| Issue |
E3S Web Conf.
Volume 407, 2023
Actual Problems of Ecology and Environmental Management (APEEM 2023)
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 7 | |
| Section | Environmental Geosciences | |
| DOI | https://doi.org/10.1051/e3sconf/202340702002 | |
| Published online | 02 August 2023 | |
Methodology for urbanized watersheds parameters ascertainment
1 Saint Petersburg State University, VO 10-line 33-35, 199178, St. Petersburg, Russia
2 Russian State Hydrometeorological University, Rizhsky Ave. 11, 190103 St. Petersburg, Russia
3 Palace of Child Youth Art «At the Voznesensky Bridge», Grazhdanskaya Str. 26, 190031, St. Petersburg, Russia
4 Koopman International, Distelweg 88, 1031 HH, Amsterdam, Netherlands
* Corresponding author: klubov_stepan@mail.ru
The paper presents elaborated methodology for Saint Petersburg and its outskirts watersheds parameters ascertainment. The methodology is based on usage of the digital terrain model, which was created as result of topographic maps digitalization. Usage of the most popular global digital terrain models such as SRTM, ASTER GDEM makes difficulties under the conditions of big cities. The models were processed on the base of Earth surface radar mapping. Therefore, the altitude values have distortions due to the radar signal reflection from roofs, structures, trees, scrubs, and so on. Thus, the global models include noisy data. The distortions can lead to mistakes at determination of the watersheds boundaries. Topographic maps digitalization allows elaborating of digital terrain models without distortions of the altitude values. The watersheds boundaries ascertainment was carried out by means of the ArcGIS tool Watershed. In addition, we use for the ascertainment and determination of the catchments areas structure some tools of Quantum GIS (QGIS) and SAGA.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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