同位素揭示的洛惠渠灌区地下水盐运动规律  

Study on the Transfer of Groundwater and Salt by Stable Isotope in Luo-hui Irrigation Scheme

作　　者：杜中[1,2] 李占斌[1,3] 李鹏[1,3] 宁有丰[1] 鲁克新[1] 邹兵华[1] 朱冰冰[1] 于国强[1] 张霞[1,4] 刘海波[1] 

机构地区：[1]西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048 [2]辽宁省水文水资源勘测局丹东分局,辽宁丹东118001 [3]中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100 [4]陕西环境科学研究设计院,陕西西安710061

出　　处：《西北农业学报》2008年第6期343-347,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家重点基础研究发展计划项目(2007CB407206);国家科技支撑项目(2006BAD09B02);陕西省教育厅科研项目(06JK215);中日合作项目(SBS-329)资助项目

摘　　要：对洛惠渠灌区地下井水和补给源水的氢和氧同位素值进行监测,分析灌区地下水补给情况及其对盐分运动的影响。结果显示灌区地下水从三级阶地流向二级阶地和一级阶地,洛河、黄河水也补给一级阶地东南部分,该区域由于开采低盐的地下井水灌溉形成降落漏斗。盐分资料显示地下水盐分和地表土壤盐量呈正相关关系,三级阶地地下水盐分大部分来自地质沉积物中可溶盐溶解,而一级阶地除地质沉积物中可溶盐溶解外,还有三级阶地的流入盐分和河水盐分。Luo-hui irrigation scheme, located in the east of Guanzhong plain of Shaanxi Province, was the terrace of Weihe river and Luohe river. Analysis the recharges and it＇s effect to salt movement, monitoring the values of hydrogen and oxygen＇s stable isotopes, the results showed that the groundwater of the third terrace flows to the first terrace, and the water of the Luohe river and the Yellow river recharges to the southeast of the first terrace by pumping for irrigation. There is a positive correlation between the salinity of groundwater and the salinity of surface soil in the same wells, all the area＇s salt mainly dissolved from the sediment, but the first terrace have some parts from the up-terrace and rivers. It is very useful for the irrigation and the prevention for salinity.

关 键 词：稳定同位素 示踪 地下水补给 盐运动 洛惠灌区 

分 类 号：P641[天文地球—地质矿产勘探]