研究的主要内容包括：（1） 地表漫流系统对污染河水的处理效果及能力；
The main research contents include: (1) The efficiency and ability of overland flow systems in treating polluted river water;
介绍基于地表径流漫流模型从数字高程模型(dem)提取水系的一系列算法。
A set of algorithms for extracting drainage network from digital elevation model (DEM) based on ground water overflow model is introduced.
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