1 Entin A.L.
2 Samsonov T.E.
3 Lurie I.K.

Lomonosov Moscow State University (MSU)

The development of digital elevation models (DEM) and methods of its analysis expanded its application in various geographical researches, and for hydrological modeling in particular. In this paper we present a procedure of harmonizing DEM and hydrographic network for automated basin delineation at a small scale. It is shown that the harmonization procedure is a necessary step of hydrological modeling, the requirements to the harmonization procedure are defined, as well as minimum data set needed for reliable harmonization. This data set includes: water courses (linear objects), water bodies (polygonal objects), marks in endorheic basins (point objects). A special harmonization procedure is proposed; this procedure includes DEM elevation decreasing along hydrographic objects, creating artificial DEM edges and closed local depression removing. The proposed procedure was used to harmonize GMTED2010 data with the vector hydrographic network from VSEGEI basemaps. The applicability of matching procedure was evaluated through basin delineation and further visual comparison with elevation, hydrographic objects, and HydroBASINS data. Visual examination shows high reliability of the computation result (more than 90 % basins are delineated correctly), which allows us to conclude that the matching technique is suitable for low-resolution DEMs.
The study was supported by the grant of the Russian geographical society № 21/2016-P, updated and clarified under RFBR grant № 17-05-41030 RGO_а.
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Entin A.L., 
Samsonov T.E., 
Lurie I.K., 
(2019) Harmonization of digital elevation models and hydrographic network for basin delineation. Geodesy and cartography = Geodezia i Kartografia, 943(1), pp. 94-101. (In Russian). DOI: 10.22389/0016-7126-2019-943-1-94-101
Publication History
Received: 27.07.2018
Accepted: 05.10.2018
Published: 20.02.2019


2019 January DOI:

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