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《Research of Soil and Water Conservation》 2005-03
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Study and Use on the 4D Technology to Construct Digital Watershed Frame

YAN Hui-min~1,LI Bi-cheng~(2,3),LI Shi-hua~4(1.Institute of Geographical Sciences and Natural Resource Research of CAS,Beijing 100101,China;2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resource;3.Northwest Sci-tech University of Agriculture and Forestry,Yangling,Shaanxi 712100,China;4.The State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101,China)  
The first step of constructing digital watershed is deciding the structure of watershed's spatial data frame and its building method, so as to make sure the digital watershed including enough and easy spatial data to process.4D technology shows predominance by its products,and the method which 4D products are used as basic frame of digital watershed has been spread in Loess Plateau watershed.4D products'roles and significations in digital watershed,the flow of building digital watershed by 4D technology suitable to watershed and the factors which influence precision and efficiency are all presented,and the feasibility and practice are discussed.
【Fund】: 国家“十五”重大科技攻关课题(2001BA606A-4)
【CateGory Index】: P208
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