流域降雨径流路径的数字模拟技术

Numerical simulation technique for routing precipitation-runoff in watershed

流域内降雨径流流动过程的水文分析具有重要意义。此文基于地理信息系统的栅格系统 ,利用数字高程模型 ( DEM)提供地形特征的能力 ,通过一系列相连的数据集 ,用计算机对流域降雨径流路径进行了数字模拟 ,其可以实现以正确的水文顺序跟踪地表径流在流域空间范围内的流动路径 ,并确定地表径流在流域空间内流动路径的水文计算等级 ,为基于流域降雨径流关系的建模研究提供了空间分析基础。最后把该项研究成果应用于黄家二岔小流域 。

Hydrological analysis of precipitation runoff routing process in watershed is of very importance. Based on the grid system in GIS, the precipitation runoff routing was numerically simulated with the computer through a series of related data sets making use of DEM's function to provide topographic features. It makes overland flow in the spatial range of a watershed be traced with the correct hydrological sequence and the hydrological computation rank of the runoff path in the watershed be determined of a spatial range. This provides spatial analysis basis for the modeling research based on the precipitation runoff relation in the watershed. Finally the research achievement was applied in the Huangjiaercha small watershed, the simulation technique was verified to have a definite reliability and practicability.