宁夏青铜峡河西灌区水文及水文地质参数研究

Study on hydrologic and hydrogeologic parameters for west irrigated areas of Qingtong Gorge of Ningxia

对宁夏青铜峡河西灌区几个主要的水文及水文地质参数 ,如给水系数、降雨入渗补给系数、灌溉入渗补给系数、灌溉回归系数、潜水蒸发系数、渗透系数进行较深入的探讨 ,重点分析这些参数的定义及其变化机理 ,特别是变值给水度、次降雨入渗补给系数等与传统概念的差别 ,并简要说明这些参数的确定方法 ,最后还分别给出研究区不同分区的参数数值。

A discussion is made on some main hydrologic and hydrogeologic parameters for the west irrigated areas of Qingtong Gorge, including the specific yield, the coefficient of recharge by rainfall penetration, the coefficient of recharge by irrigation penetration, the regression coefficient of irrigation, the coefficient of groundwater evaporation, and the coefficient of permeability, with emphasis placed on the definition of the parameters and the mechanism of their variations, especially the differences between the present definitions of variable specific yield and coefficient of recharge by secondary rainfall penetration and their conventional concepts. Besides, methods for determination of the parameters are briefly introduced, and the values of the parameters are given for different sections of the studied region.