基于SALTMOD模型的灌溉水矿化度对土壤盐分的影响  

Effect of Irrigation Water Mineralization on Soil Salinity Based on SALTMOD Model

作　　者：陈艳梅[1,2] 王少丽[1,2] 高占义[1,2] 管孝艳[1,2] 

机构地区：[1]国家节水灌溉工程技术研究中心,北京100048 [2]中国水利水电科学研究院水利研究所,北京100048

出　　处：《灌溉排水学报》2012年第3期11-16,共6页Journal of Irrigation and Drainage

基　　金：中美国际科技合作项目(2009DFA71850);水利部948项目(201119);国家自然科学基金项目(51079162;51009152)

摘　　要：以河套灌区沙壕渠灌域为例,运用SALTMOD模型探讨了区域尺度灌溉水矿化度对根层土壤盐分的影响。结果表明,根层土壤盐分随灌溉水矿化度的增大而增加,加大排水沟深度和提高渠道衬砌水平可缓解高矿化度灌溉水对土壤积盐的影响;采用地下微咸水和黄河水混合灌溉可有效控制盐渍化的发展,混合比在1∶1范围内时,根层土壤处于脱盐状态,最高脱盐率为23%,脱盐率高于引用黄河水灌溉的脱盐率(4%)。因此,适度利用地下微咸水灌溉,可有效的控制地下水位,节约淡水资源。Taking Shahaoqu irrigation district of Hetao irrigation district as an example,in this paper,the effect of irrigation water salinity on root zone soil salinity was discussed based on SALTMOD model on regional scale.The results showed that root zone soil salinity increased with the increase of irrigation water mineralization,deepening the depth of the drain and increasing canal lining could relieve the effect of high mineralization irrigation water on soil salinity;blending underground brackish water with Yellow River water could effectively control the development of soil salinization.When brackish-fresh water ratio was in 1∶1,root-zone soil was desalinated,the desalination rate was as highest as 23% and above Yellow River water irrigation＇s 4%.Moderate use of underground brackish water could effectively control groundwater depth and save water resources.

关 键 词：SALTMOD模型 微咸水灌溉 土壤盐分 矿化度 渠道衬砌 

分 类 号：S156.4[农业科学—土壤学]