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剔除流域输入端降水的因素,流域水文特征与流域面积大小、形状、流域坡度、河道坡度以及河网密度等地貌特征关系紧密。本文利用数字高程模型,按照流域几何特征测量方法,进行分区分水系流域几何特征测算,并分析同水系内特征参数随面积变化规律,基此研究流域之间相似性识别,成果可直接为设计洪水计算提供参考,是无资料地区面积比拟、产汇流参数移植、流域水文模型参数调试的基本依据。
Excluding the precipitation at the input end of the basin, the hydrological characteristics of the basin are closely related to the features of the basin area, such as the size and shape of the basin, the slope of the basin, the slope of the river and the density of the river network. In this paper, the digital elevation model is used to calculate the geometrical characteristics of watershed watershed according to the geometric characteristics of watershed, and the variation of characteristic parameters with area is analyzed. Based on this, the similarities between watersheds can be studied. The results can be directly used to design flood The calculation provides a reference, which is the basic basis for the comparison of the area without data, the transplantation of production and sink parameters, and the commissioning of hydrological model parameters.