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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 ,证实该模拟技术具有一定的可靠性和实用性
Hydrological analysis of the process of rainfall runoff in the basin is of great significance. In this paper, based on the grid system of GIS, the digital elevation model (DEM) is used to provide the topographic features. Through a series of connected datasets, the computer simulates the rainfall and runoff path in the river basin, Hydrological sequence to track the flow path of surface runoff in the basin space and to determine the hydrological level of the surface runoff in the catchment space provides the basis for spatial analysis based on the modeling of rainfall runoff in the basin. Finally, the research result is applied to the Huangjia Ercha Small Watershed, which proves that the simulation technology has certain reliability and practicability