【作者】 向友珍； 王双银； 程冬玲； 刘俊民；

【Author】 Xiang Youzhen,Wang Shuangyin,Cheng Dongling,Liu Junmin (College of Water Resources and Architectural Engineering,Northwest Agriculture and Forestry University,Yangling 712100,China)

【机构】 西北农林科技大学水利与建筑工程学院；

【摘要】 渭北黄土塬灌区既是陕西省经济最发达的地区,也是主要的粮食主产区,对该区域黄土渗透性动态变化的研究具有重要的意义。本文以渭北黄土塬灌区黄土的渗透系数作为研究对象,利用50多年的降水资料和灌溉用水调查统计资料,对黄土塬灌区含水层渗透系数的演化规律进行了分析评价。结果表明,灌区的灌溉入渗和降雨补给在时间上互补,在强度上互有加强,使得灌溉水入渗效应十分明显,灌溉水的入渗使包气带发生变化,导致黄土塬灌区黄土渗透系数变大;分析认为气候的变化和长期的灌溉是导致黄土渗透系数变化的主要因素。更多还原

【Abstract】 Irrigation area of the Loess Plateau in Shaanxi Province is the most economically developed regions,and is also a major grain producing areas.So studying the permeability of loess in the region of dynamic change is significant.In this paper,using 50 years of precipitation and irrigation water use survey data on the Loess Plateau Irrigation District and the hydraulic conductivity evolution of analyzed and evaluated by the studying the Loess Plateau loess penetration coefficient irrigation.The results showed that in the irrigation area the irrigation and rainfall’s infiltration recharge complementally in time each other,strengthen each other in intensity.It making very clear effect of irrigation water,irrigation water s infiltration changing in unsaturated zone,it resulted in the permeability of Loess Plateau Irrigation District larger.The climate change and long-term irrigation are the Loess major factor of leading to permeability changes.更多还原