【摘要】 采用地理信息系统方法,对流域的地形地貌特征进行分析,模拟水质点在流域上的运动轨迹,并根据水质点汇流时间与汇流路径、坡度、坡长的关系,建立了流域汇流等流时线模型.经实例验证,效果较好.更多还原

【Abstract】 After analysing the watershed landform with the method of Geography Information System(GIS), the movement of a water particle can be conveniently traced in the process of watershed flow concentration. Its flow concentration time, which is from the starting point to the watershed outlet, is connected with the length and gradient along the flow pathway. According to the method, the flow concentration time of a water particle can be computed, which makes it possible that creates the model of equivalent flow duration con-tour aided by computer. The simulation method is proved effective by examing Huangshan runoff experiment basin.更多还原