The aim of thepaper is to construct a holistic framework of digital watershed model system.
本文的研究目标就是建立全流域的数字流域模型框架。
With the digital earth notion coming into being and the development of the technology system, construction of digital watershed has more technic support.
数字地球的产生及其技术体系的完善，为建立数字流域提供坚实的技术支撑。
The watershed topography is a key factor for extraction of the drainage, and it is also a very important topic in the study of digital watershed and the distributed hydrological models.
流域地形是决定水系生成的一个关键性因素，是数字流域和分布式水文模型研究的主要内容。
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