Digital Drainage Network Model of Ebinur Lake Basin of Bortala Mongol Autonomous Prefecture Based on DEM Data

Abstract:

In order to study steam network of Ebinur Lake Basin of Bortala Mongol Autonomous Prefecture, SRTM-4 DEM data and ASTER-2 GDEM data were used as the basic topographic data and ArcGIS HydroTools was utilized for extension module so as to study on extracting digital drainage network of watershed based on surface runoff model, as well as to compare the two extraction results. The result showed that ASTER-2 GDEM data is more suitable for stream network extraction with large and medium scales than SRTM-4 DEM data. Simulate digital network method by correlation analysis of choosing an appropriate flow accumulation threshold will make the generated network match up to the factual drainage network on 1:250000 scale topographic map much better. Meanwhile, the veracity of simulation results has also been ensured for further hydrological analysis.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 1161-1165
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.1161
• Online since: February 2014
• Authors: Xiao Li Liu*, Jing Gang Li, Xue Li, Qiu Liang Wang, Li Fen Zhang, Wu Lin Liao
• Keywords: ArcGIS, Digital Elevation Model (DEM), Ebinur Lake Basin, Flow Accumulation Threshold, Stream Networks

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