Comparison of depression removal methods implemented in open-source software

• Autorzy: Šamanović Sanja , Markovinović Danko , Cetl Vlado , Đurin Bojan

Identyfikatory

DOI

10.57599/gisoj.2022.2.1.85

• Języki publikacji: EN

Abstrakty

EN

Modern tools for hydrological analysis are based on data derived from DEM. Hydrological methods that create a stream network by overland flow simulation require to remove depression (pit or sink) on DEM first. Depression occurs when a cell or group of cells is surrounded by adjacent cells at higher altitudes. Even though their removal creates an incorrect DEM, it is common practice to remove all topographic depressions (real, artificial, or combined) not to interrupt the creation of stream networks. There are two basic methods of depression removal: the filling method and the carving or breaching. Combined methods contain good characteristics of both procedures. GIS software includes a depression removal algorithm within its hydrological analysis module. The paper investigates which methods are implemented within individual open-source software SAGA and GRASS. A comparison of DEM before and after depression removal for each method is given. The methods were tested on a DEM, resolution 5x5 meter for a hilly area intersected by a significant number of watercourses.

Słowa kluczowe

EN

DEM; depression removal; open-source software; stream network; filling method; carving method

PL

DEM; usuwanie depresji; oprogramowanie open source; sieć rzeczna; metoda wypełniania; metoda rzeźbienia

• Wydawca: SILGIS Association ; Croatian-Polish Scientific Network
• Czasopismo: GIS Odyssey Journal
• Rocznik: 2022
• Tom: Vol. 2, no. 1
• Strony: 85--97
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

Šamanović Sanja

• University North, Department of Geodesy and Geomatics, Croatia

• https://orcid.org/0000-0003-1212-5583

autor

Markovinović Danko

• University North, Department of Geodesy and Geomatics, Croatia

• https://orcid.org/0000-0001-6435-9790

autor

Cetl Vlado

• University North, Department of Geodesy and Geomatics, Croatia

• https://orcid.org/0000-0003-1835-5777

autor

Đurin Bojan

• University North, Department of Civil Engineering, Croatia

• https://orcid.org/0000-0002-2361-8036

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).