| Research on generating high resolution hydrologically correct DEMs in eroded topographic area |
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| DOI：10.7606/j.issn.1000-7601.2008.03.49 |
| Key Words: DEM ANUDEM resolution undulated hilly region in northeast China steep hilly region in southern China |
| Author Name | Affiliation | | GUO Weiling | College of Resources and Environment Northwestern A ＆ F University,Yangling, Shaanxi 712100,China；Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100, China | | YANG Qinke | College of Resources and Environment Northwestern A ＆ F University,Yangling, Shaanxi 712100,China；Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100, China | | WANG Cuiying | College of Resources and Environment Northwestern A ＆ F University,Yangling, Shaanxi 712100,China；Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100, China | | LI Wenfeng | College of Resources and Environment Northwestern A ＆ F University,Yangling, Shaanxi 712100,China；Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100, China |
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| Abstract: |
| Research was conducted to generate hydrologically correct DEM of large-scale in the undulated hilly region in Northeast China and in steep hilly region in South China with 1∶10000 digital topographic maps including contours spot heights streams and lakes and using the ANUDEM software．The derived contours the representation of topography and river networks were selected to evaluate the quality of the DEM．Result showed that using digital map and ANUDEM software can generate hydrologically correct DEM of large-scale in these two sample regions．For generating the DEM three main parameters of ANUDEM including resolution iteration number and2nd roughness were1m 40 and0．5in the undulated hilly region in Northeast China and 5 m 40 and 0．6 in the steepy hilly region in South China．The derived contours and river networks were highly up to the input data．The DEM generated can correctly describe the topography characteristics and the relationship of physiognomy and hydrology. |
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