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《Advances In Water Science》 2000-04
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A Review of the Digital Elevation Model Extraction and Digital Hydrological Modeling

REN Li liang, LIU Xin ren (College of Water Resources and Environment, Hohai University,Nanjing 210098,China)  
In this paper, the methodology of drainage network extraction from grid based the digital elevation model (DEM) is reviewed. Then the current situation of application of information extracted from a DEM data in the field of hydrology and water resources are remarked. It is shown that the digital model plays a great role in data mining in hydrology and water resources. Water related data measured at gauged stations could be assimilated to areal information over a catchment by the digital model, so as to serve for all trades and professions of national economy. Finally the position and the perspective of the digital hydrology (DH)in digital earth are discussed. The DH is an important component of digital earth. It needs further research.
【Fund】： 国家重点基础研究专项经费资助项目!( G19990 4 34 0 0 );; 国家自然科学基金资助项目!( 4 9794 0 30 )&&
【CateGory Index】： P333.9
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