{"id":2396,"date":"2026-10-19T08:53:38","date_gmt":"2026-10-19T06:53:38","guid":{"rendered":"https:\/\/geospector.de\/depth-measurement-of-water-bodies-with-drones\/"},"modified":"2026-10-19T13:27:00","modified_gmt":"2026-10-19T11:27:00","slug":"water-depth-measurement-drones","status":"publish","type":"page","link":"https:\/\/geospector.de\/en\/water-depth-measurement-drones\/","title":{"rendered":"Depth Measurement of Water Bodies with Drones"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2396\" class=\"elementor elementor-2396 elementor-2352\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9f511a5 e-flex e-con-boxed e-con e-parent\" data-id=\"9f511a5\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;shape_divider_bottom&quot;:&quot;waves&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-shape elementor-shape-bottom\" aria-hidden=\"true\" data-negative=\"false\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1000 100\" preserveAspectRatio=\"none\">\n\t<path class=\"elementor-shape-fill\" d=\"M421.9,6.5c22.6-2.5,51.5,0.4,75.5,5.3c23.6,4.9,70.9,23.5,100.5,35.7c75.8,32.2,133.7,44.5,192.6,49.7\n\tc23.6,2.1,48.7,3.5,103.4-2.5c54.7-6,106.2-25.6,106.2-25.6V0H0v30.3c0,0,72,32.6,158.4,30.5c39.2-0.7,92.8-6.7,134-22.4\n\tc21.2-8.1,52.2-18.2,79.7-24.2C399.3,7.9,411.6,7.5,421.9,6.5z\"\/>\n<\/svg>\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-465d014 elementor-widget elementor-widget-heading\" data-id=\"465d014\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Technical article<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76f1d26 elementor-widget__width-inherit elementor-widget elementor-widget-heading\" data-id=\"76f1d26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Depth Measurement of Water Bodies with Drones<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9d1ea6a elementor-widget elementor-widget-button\" data-id=\"9d1ea6a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/geospector.de\/en\/kontakt\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Arrange a consultation<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b980091 e-flex e-con-boxed e-con e-parent\" data-id=\"b980091\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-72aaeeb elementor-widget elementor-widget-text-editor\" data-id=\"72aaeeb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Dipl.-Ing. David Mauro, Geospector Munich \u00b7 First published in the special issue \u201cMesstechnik im Bauwesen 2023\u201d (Ernst &#038; Sohn Special 2023, pp. 31\u201333)<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4720491 elementor-widget elementor-widget-text-editor\" data-id=\"4720491\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The use of remotely controlled sensors in the air, on the water and on the ground promises to become extremely exciting in the coming years \u2013 not only as an alternative to conventional surveying, but also by opening up entirely new fields of application. Efficient depth measurement of natural and artificial small water bodies is finally possible as well: ponds, lakes and basins can now be surveyed and inspected within a very short time using innovative drone sensors. This is particularly important for critical and dynamic water bodies with heavy sediment and sludge inflow. Municipalities, operators and maintenance managers as well as hydraulic engineers in particular have a growing and often urgent, but repeatedly postponed need here.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f99a62a e-con-full e-flex e-con e-child\" data-id=\"f99a62a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-264b5ae elementor-widget elementor-widget-heading\" data-id=\"264b5ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Key facts at a glance<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-875768e elementor-widget elementor-widget-text-editor\" data-id=\"875768e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Ponds, lakes and basins are surveyed area-wide by drone \u2013 without jetties, cranes or boats.<\/li><li>An average small water body is captured in around one hour; with RTK GNSS, accuracy is in the centimeter range down to a water depth of 25 m.<\/li><li>The deposit surface and the bed are measured separately \u2013 the difference gives the sludge or sediment thickness.<\/li><li>Result: a depth model plus sediment volume, empty volume and remaining storage capacity as a basis for decisions on rehabilitation and sediment removal.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-def49f8 elementor-widget elementor-widget-heading\" data-id=\"def49f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The DTS Acqua measuring method<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e0fcd9c elementor-widget elementor-widget-text-editor\" data-id=\"e0fcd9c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Until now there was no simple solution: sounding required jetties to be built or cranes to be set up, and boats often could not be used because there was no access. Even under optimal conditions, measurements were only possible at individual points \u2013 ideally the critical ones \u2013 and accurate documentation had to be prepared manually.<\/p><p>This is where the DTS Acqua measuring method, developed by the drone specialist Geospector, offers a solution that is available as a service: Geospector\u2019s drone laser mapper has been extended with additional sensors such as sonar, an efficient sounding system and an underwater camera to form DTS Acqua.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b968bc6 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"b968bc6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1054\" height=\"692\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Drohne_DTS_Acqua_Bild1.jpg\" class=\"attachment-full size-full wp-image-2329\" alt=\"Drone with sonar above a stormwater retention basin, below it a colored depth model of the basin bed\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Drohne_DTS_Acqua_Bild1.jpg 1054w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Drohne_DTS_Acqua_Bild1-300x197.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Drohne_DTS_Acqua_Bild1-1024x672.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Drohne_DTS_Acqua_Bild1-768x504.jpg 768w\" sizes=\"(max-width: 1054px) 100vw, 1054px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 1: Schematic representation of depth measurement by drone<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b97e26 elementor-widget elementor-widget-text-editor\" data-id=\"0b97e26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Without any further preparatory work, area-wide depth models can thus be surveyed within a very short time \u2013 in contrast to spot soundings. Using RTK GNSS, accuracy is in the centimeter range at water depths of up to 25 m. The measurement data are processed and documented during the survey and immediately visualized on a map, so that critical areas, for example, can be examined in more detail.<\/p><p>This measuring method therefore offers a completely new approach to bathymetric surveys: it has never been so easy \u2013 and at such low cost \u2013 to produce exact, area-wide depth models. The measurement data can be further processed into point clouds and CAD models and used for comparisons with the design profile and for volume calculations.<\/p><p>The depth model of an average small water body can be captured over its entire area within one hour. The subsequent comparison with the design profiles (geometric basins or near-natural ponds) yields the loss of storage capacity from the area-wide distribution of sludge and sediment thicknesses.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0e460ef e-con-full e-flex e-con e-child\" data-id=\"0e460ef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-c9db58d e-con-full e-flex e-con e-child\" data-id=\"c9db58d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3826597 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"3826597\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1058\" height=\"617\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild2_Ablagerung_Sedimente.jpg\" class=\"attachment-full size-full wp-image-2331\" alt=\"3D model of a stormwater retention basin with sediment and sludge deposits on the bottom\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild2_Ablagerung_Sedimente.jpg 1058w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild2_Ablagerung_Sedimente-300x175.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild2_Ablagerung_Sedimente-1024x597.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild2_Ablagerung_Sedimente-768x448.jpg 768w\" sizes=\"(max-width: 1058px) 100vw, 1058px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 2: Deposition of inflowing sediment and sludge on the basin bottom<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f3243f8 e-con-full e-flex e-con e-child\" data-id=\"f3243f8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f37ec26 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"f37ec26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1058\" height=\"617\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild3_Beckensohle.jpg\" class=\"attachment-full size-full wp-image-2333\" alt=\"Colored depth model of the bed of a stormwater retention basin\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild3_Beckensohle.jpg 1058w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild3_Beckensohle-300x175.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild3_Beckensohle-1024x597.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild3_Beckensohle-768x448.jpg 768w\" sizes=\"(max-width: 1058px) 100vw, 1058px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 3: Depth measurement of the basin bed<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bf942e elementor-widget elementor-widget-heading\" data-id=\"2bf942e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Explanation of the method using a stormwater retention basin (RRB) as an example<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7894622 elementor-widget elementor-widget-heading\" data-id=\"7894622\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Determining sludge thickness and loss of storage capacity<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b70849f elementor-widget elementor-widget-text-editor\" data-id=\"b70849f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Stormwater retention facilities require a minimum storage capacity for safe operation, which decreases over time due to the inflow of sludge and sediment. Continuous monitoring is therefore necessary. For facilities with a permanent pool, this has so far been very laborious (sounding from inflatable boats or jetties) and has therefore usually been carried out \u2013 if at all \u2013 only at a few individual points.<\/p><p>Many facilities were built decades ago, and there is great uncertainty about the bed profile because exact plans are missing, modifications have not been adequately documented and no baseline surveys were carried out. DTS Acqua can therefore also determine the bed profile, make up for missing baseline surveys and update inaccurate plans. With this reliable basis for decisions, the costs of rehabilitation and desludging measures can be minimized and ideally even avoided altogether.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9733526 elementor-widget elementor-widget-heading\" data-id=\"9733526\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Conventional approach: sounding<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec1ea6c elementor-widget elementor-widget-text-editor\" data-id=\"ec1ea6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Until now, sounding was the only option. A sounding rod is pushed vertically through the deposits down to the bed at selected points from the bank, a jetty or a boat; after the rod has been pulled out, the deposit thickness D is determined directly from the material adhering to it. With gravel or similar material this method fails, and one can try to estimate the thickness from the water level read off when the rod touches the deposit surface. There is no automatic documentation of position and thickness, and the procedure is usually limited to a few spot samples.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90d9885 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"90d9885\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"300\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild4_Sondierung.jpg\" class=\"attachment-full size-full wp-image-2335\" alt=\"Schematic cross-section: conventional sounding with a sounding rod through the sludge layer\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild4_Sondierung.jpg 1067w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild4_Sondierung-300x84.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild4_Sondierung-1024x288.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild4_Sondierung-768x216.jpg 768w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 4: Conventional sounding<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15a1c6f elementor-widget elementor-widget-heading\" data-id=\"15a1c6f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Approach with DTS Acqua<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4d17ea elementor-widget elementor-widget-text-editor\" data-id=\"d4d17ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In contrast to conventional sounding, the deposit surface and the bed level are measured separately. Depending on local conditions, a wide range of drone-based and manual methods (laser scanning, sonar, automatic sounding, etc.) is available for efficient, area-wide data capture. In addition to the vertical distances h, all methods uniformly record the centimeter-accurate position coordinates X using RTK GNSS and transmit them to a server in real time for further processing.<\/p><p>The deposit thickness D is then obtained as the difference between the absolute heights of the top of the deposit and the bed (equation 1):<\/p><p style=\"text-align: center;\"><strong>D = h<sub>O<\/sub> \u2013 h<sub>S<\/sub> = h<sub>O-GNSS<\/sub> \u2013 d<sub>O<\/sub> \u2013 (h<sub>S-GNSS<\/sub> \u2013 d<sub>S<\/sub>)<\/strong>&nbsp;&nbsp;&nbsp;(1)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-365df78 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"365df78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"408\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild5_Ablagerungsdicke.jpg\" class=\"attachment-full size-full wp-image-2337\" alt=\"Schematic cross-section: determining deposit thickness D from GNSS heights of the deposit surface and the bed\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild5_Ablagerungsdicke.jpg 1067w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild5_Ablagerungsdicke-300x115.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild5_Ablagerungsdicke-1024x392.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild5_Ablagerungsdicke-768x294.jpg 768w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 5: Deposit thickness D<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7bc1f91 elementor-widget elementor-widget-text-editor\" data-id=\"7bc1f91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In practice, CAD plans or hand sketches of the water body geometry are usually available, so only a few measurements of the bed profile are needed to check the plausibility of the plans and correct them if necessary. In this case, the procedure is as follows:<\/p><ol><li>Spot measurement of the bed profile<\/li><li>Area-wide measurement of the deposit surface<\/li><li>Definition of the height and geo-reference for matching the CAD data with the GNSS measurements<\/li><li>Modeling of the bed, including a plausibility check using step 1 and corrections if necessary<\/li><li>Determination of the deposit thicknesses by calculating the difference<\/li><li>Further evaluations such as volume calculations<\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6c3d061 elementor-widget elementor-widget-heading\" data-id=\"6c3d061\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Spot measurement of the bed profile<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-84431c3 elementor-widget elementor-widget-text-editor\" data-id=\"84431c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Several cross-sections and longitudinal profiles are recorded with the sounding drone. If the bed geometry is unknown or natural, existing CAD plans can be dispensed with by densifying the measurements accordingly, and the bed geometry can be determined solely from the automated soundings.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0696412 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"0696412\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"242\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild6_Sohlverlauf.jpg\" class=\"attachment-full size-full wp-image-2339\" alt=\"Schematic cross-section: spot measurement of the bed profile with the sounding drone\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild6_Sohlverlauf.jpg 1067w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild6_Sohlverlauf-300x68.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild6_Sohlverlauf-1024x232.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild6_Sohlverlauf-768x174.jpg 768w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 6: Spot measurement of the bed profile<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65d3da9 elementor-widget elementor-widget-heading\" data-id=\"65d3da9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Area-wide measurement of the deposit surface<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d755d08 elementor-widget elementor-widget-text-editor\" data-id=\"d755d08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The entire deposit area is captured densely by sonar or bathymetric laser scanning, so that local accumulations or scour can also be identified in detail.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f3e8ff elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"3f3e8ff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"221\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild7_Ablagerungsoberflaeche.jpg\" class=\"attachment-full size-full wp-image-2341\" alt=\"Schematic cross-section: area-wide measurement of the deposit surface by sonar\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild7_Ablagerungsoberflaeche.jpg 1067w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild7_Ablagerungsoberflaeche-300x62.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild7_Ablagerungsoberflaeche-1024x212.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild7_Ablagerungsoberflaeche-768x159.jpg 768w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 7: Measurement of the deposit surface<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a172968 elementor-widget elementor-widget-heading\" data-id=\"a172968\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Definition of the height and geo-reference<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6006f04 elementor-widget elementor-widget-text-editor\" data-id=\"6006f04\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Several ground points for which the CAD plans contain height information (e.g. the bottom edge of the inlet) are surveyed using RTK GNSS. After a plausibility check, the transformation parameters from the CAD plan to the current GNSS system are determined.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32c34fe elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"32c34fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1067\" height=\"269\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild8_Georeferenz.jpg\" class=\"attachment-full size-full wp-image-2343\" alt=\"Schematic cross-section: defining the height and geo-reference by GNSS measurement at the inlet\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild8_Georeferenz.jpg 1067w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild8_Georeferenz-300x76.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild8_Georeferenz-1024x258.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild8_Georeferenz-768x194.jpg 768w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 8: Definition of the height and geo-reference<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8cf907d elementor-widget elementor-widget-heading\" data-id=\"8cf907d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Modeling the bed<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e51668 elementor-widget elementor-widget-text-editor\" data-id=\"6e51668\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The CAD plans are transformed and checked for plausibility using the bed soundings, any deviations are corrected, and a 3D depth model of the bed is created.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1cebca elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"f1cebca\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1063\" height=\"221\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild9_Modell_Sohle.jpg\" class=\"attachment-full size-full wp-image-2345\" alt=\"Schematic cross-section: modeled bed beneath the deposits\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild9_Modell_Sohle.jpg 1063w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild9_Modell_Sohle-300x62.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild9_Modell_Sohle-1024x213.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild9_Modell_Sohle-768x160.jpg 768w\" sizes=\"(max-width: 1063px) 100vw, 1063px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 9: Modeling the bed<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dfbf17d elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"dfbf17d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1054\" height=\"617\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild10_Beckengeometrie.jpg\" class=\"attachment-full size-full wp-image-2347\" alt=\"3D model of the geometry of an empty stormwater retention basin after construction\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild10_Beckengeometrie.jpg 1054w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild10_Beckengeometrie-300x176.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild10_Beckengeometrie-1024x599.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild10_Beckengeometrie-768x450.jpg 768w\" sizes=\"(max-width: 1054px) 100vw, 1054px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 10: The geometry of the retention basin after construction, in its empty state<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54db627 elementor-widget elementor-widget-heading\" data-id=\"54db627\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">5. Determining the deposit thicknesses D<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5941e70 elementor-widget elementor-widget-text-editor\" data-id=\"5941e70\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The corresponding height values of the bed model are subtracted from the height values h<sub>O<\/sub> of all surface measurements; this gives the respective value of the deposit thickness D. Since the position coordinates P<sub>O<\/sub> are known at the same time, the result is an area-wide representation of the deposit heights over the entire bed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf704f8 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"cf704f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1054\" height=\"242\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild11_Ablagerungsdicken.jpg\" class=\"attachment-full size-full wp-image-2349\" alt=\"Schematic cross-section: determining deposit thicknesses D as the difference between surface and bed\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild11_Ablagerungsdicken.jpg 1054w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild11_Ablagerungsdicken-300x69.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild11_Ablagerungsdicken-1024x235.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild11_Ablagerungsdicken-768x176.jpg 768w\" sizes=\"(max-width: 1054px) 100vw, 1054px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 11: Determining the deposit thicknesses D<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed5f208 elementor-widget elementor-widget-heading\" data-id=\"ed5f208\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">6. Further possible evaluations<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d7d195f elementor-widget elementor-widget-text-editor\" data-id=\"d7d195f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This completes the basic evaluation of the measurements up to the area-wide determination of the deposit heights. Depending on the task, further evaluation steps are useful:<\/p><ul><li><strong>Sediment volume:<\/strong> The individual deposit thicknesses D are rasterized over the area of the bed (e.g. 1 m \u00d7 1 m) and summed. This gives the total volume of the deposits in m\u00b3. Areas that were not surveyed (e.g. because of vegetation) can usually be estimated plausibly and taken into account in the volume calculation.<\/li><li><strong>Empty volume:<\/strong> The bed model can be used to determine the empty volume of the basin without deposits (at normal or maximum water level).<\/li><li><strong>Remaining storage capacity:<\/strong> The remaining storage capacity can be derived from the empty volume or the sediment volume and stated in absolute terms in m\u00b3 or as a percentage.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f0c6d2 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"5f0c6d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1058\" height=\"617\" src=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild12_Ablagerungsvolumen.jpg\" class=\"attachment-full size-full wp-image-2351\" alt=\"Color map of deposit thicknesses in a stormwater retention basin from the comparison with the design profile\" srcset=\"https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild12_Ablagerungsvolumen.jpg 1058w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild12_Ablagerungsvolumen-300x175.jpg 300w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild12_Ablagerungsvolumen-1024x597.jpg 1024w, https:\/\/geospector.de\/wp-content\/uploads\/2026\/10\/Tiefenmessung_Bild12_Ablagerungsvolumen-768x448.jpg 768w\" sizes=\"(max-width: 1058px) 100vw, 1058px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Figure 12: Comparison with the design geometry yields deposit thickness and volume<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a812ab6 e-con-full e-flex e-con e-child\" data-id=\"a812ab6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f0ae87b elementor-widget elementor-widget-heading\" data-id=\"f0ae87b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">First publication<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1b6fa8 elementor-widget elementor-widget-text-editor\" data-id=\"f1b6fa8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This article was first published in the special issue <strong>\u201cMesstechnik im Bauwesen 2023\u201d<\/strong> (Ernst &#038; Sohn Special 2023, section \u201cGeopositionierung &#038; Digitale Welt im Bauwesen\u201d, pp. 31\u201333). The special issue (in German) can be ordered from the publisher Ernst &#038; Sohn: <a href=\"https:\/\/www.ernst-und-sohn.de\/sonderhefte\/messtechnik-im-bauwesen-2023\" target=\"_blank\" rel=\"noopener\">Messtechnik im Bauwesen 2023 at Ernst &#038; Sohn<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-db2fb06 e-con-full e-flex e-con e-child\" data-id=\"db2fb06\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-660f2dc elementor-widget elementor-widget-heading\" data-id=\"660f2dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Further technical articles<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc8640f elementor-widget elementor-widget-text-editor\" data-id=\"cc8640f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"https:\/\/geospector.de\/en\/stormwater-retention-highways\/\">Stormwater retention facilities on highways: design, function and maintenance<\/a><\/li><li><a href=\"https:\/\/geospector.de\/en\/sediment-measurement-retention-basins\/\">Sediment measurement in stormwater retention basins: measurement challenges<\/a><\/li><li><a href=\"https:\/\/geospector.de\/en\/sludge-depth-retention-basins\/\">How silted up are stormwater retention basins? Results from drone surveys across Germany<\/a><\/li><li><a href=\"https:\/\/geospector.de\/en\/sediment-volume-determination\/\">Determining sediment volume in settling basins correctly: pitfalls of spot sampling<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8e7873b e-con-full e-flex e-con e-child\" data-id=\"8e7873b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-44c9897 elementor-widget elementor-widget-heading\" data-id=\"44c9897\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Have the sludge depth in your facilities measured?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-58511e4 elementor-widget elementor-widget-text-editor\" data-id=\"58511e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>With the <a style=\"color:#FFFFFF;text-decoration:underline\" href=\"https:\/\/geospector.de\/en\/sedimentbestimmung\/\">Geospector Sludge Check<\/a>, we survey the sediment surface and bed of your stormwater retention facilities area-wide by drone \u2013 without a boat and without the need for an existing baseline survey.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54a5dc0 elementor-widget elementor-widget-button\" data-id=\"54a5dc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/geospector.de\/en\/kontakt\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Arrange a consultation<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5af556e e-con-full e-flex e-con e-child\" data-id=\"5af556e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1f6fcbe elementor-widget__width-inherit elementor-widget elementor-widget-heading\" data-id=\"1f6fcbe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">The full article is also available as a PDF download (in German).<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4ce7124 e-flex e-con-boxed e-con e-child\" data-id=\"4ce7124\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<a class=\"elementor-element elementor-element-34e6736 e-con-full e-flex e-con e-child\" data-id=\"34e6736\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\" href=\"https:\/\/geospector.de\/wp-content\/uploads\/2024\/06\/Artikel_Geospector_Acqua_.pdf\" target=\"_blank\">\n\t\t\t\t<div class=\"elementor-element elementor-element-985c7ba elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"985c7ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"40\" height=\"41\" viewBox=\"0 0 40 41\" fill=\"none\"><g clip-path=\"url(#clip0_131_932)\"><path d=\"M35.848 14.808H34.82L34.874 11.028C34.8675 10.8071 34.7824 10.5958 34.634 10.432L25.802 0.768C25.7311 0.686925 25.6442 0.621299 25.5468 0.575196C25.4495 0.529094 25.3437 0.503498 25.236 0.5H6.75599C6.34165 0.506652 5.94605 0.673802 5.65247 0.966265C5.35889 1.25873 5.19023 1.65369 5.18199 2.068V14.808H4.15199C3.58199 14.808 3.03199 15.044 2.63199 15.464C2.22387 15.8909 1.9973 16.4594 1.99999 17.05V28.71C1.99999 29.946 2.96399 30.95 4.15199 30.95H5.18199V38.93C5.18974 39.3453 5.35873 39.7414 5.65322 40.0344C5.94771 40.3274 6.34461 40.4944 6.75999 40.5H33.316C34.146 40.5 34.876 39.796 34.876 38.932V30.952H35.85C37.038 30.952 38.002 29.946 38.002 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fill=\"#CA3728\"><\/path><\/g><defs><clipPath id=\"clip0_131_932\"><rect width=\"40\" height=\"40\" fill=\"white\" transform=\"translate(0 0.5)\"><\/rect><\/clipPath><\/defs><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d9d90c3 elementor-widget elementor-widget-heading\" data-id=\"d9d90c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">Tiefenmessung von Gew\u00e4ssern mit Drohnen (PDF in German, Ernst &amp; Sohn Special 2023)<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Drone-based depth measurement of ponds, lakes and basins: the DTS Acqua measuring method, a comparison with conventional sounding, and the workflow using a stormwater retention basin as an example.<\/p>\n","protected":false},"author":2,"featured_media":2329,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-2396","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Depth Measurement of Water Bodies with Drones - Geospector<\/title>\n<meta name=\"description\" content=\"Drone-based depth measurement of ponds, lakes and basins: the DTS Acqua method compared with manual sounding, sludge thickness and volume, using a stormwater retention basin as an example.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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