洛惠渠灌区典型样区地下水位与电导率关系研究  

Variations of Groundwater Level and Electrical Conductivity in Luohui Irrigation Scheme

作　　者：刘海波[1] 李占斌[1,2] 李鹏[1] 秦学谦[3] 张霞 

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]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 [3]黄河水利委员会三门峡库区水文水资源局,河南三门峡472000 [4]陕西省环境科学研究设计院,陕西西安710061

出　　处：《水土保持通报》2011年第2期27-30,共4页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目"基于小流域淤积信息的侵蚀产沙与侵蚀环境变化响应研究"(40971161);国家"十一五"科技支撑项目"黄土高原水土流失综合治理工程关键支撑技术研究"(2006BAD09B02)

摘　　要：洛惠渠灌区位于陕西省关中平原东部,由于不同区域的积盐过程不完全相同,针对洛惠渠灌区地下水的盐分变化情况,采用Morlet小波分析了灌区76#井的电导率和水位周期变化规律。结果表明,电导率变化和水位变化有很好的相关关系。小尺度上,水位变化周期和电导率的基本相同;大尺度上,水位约为电导率变化周期的2倍。两者变化存在明显的逆向位。该地区含有大量可溶性盐层,地下水电导率本底值较高。由于大气降水补给,电导率值随水位变化在一定的范围内波动。研究结果可为该灌区地表生态环境的改善提供依据。Luohui irrigation area,located in the east of Guan-zhong plains,exhibits distinct salt accumulation processes in different regions.This study aimed at providing scientific basis for the improvement of ecological environment of the Luohuiqu irrigation district by exploring the variations of groundwater salinity.Periodical variations of groundwater level and electrical conductivity has been analyzed at well 76# using Morlet analysis.It is shown that the two variables were significantly closely correlated.The period of groundwater level on small scale was similar to that of electrical conductivity,but approximately two times longer on large scale,with a reverse phase.The electrical conductivity background of the groundwater was relatively high,because of the large amount of soluble salt layers found in this area.Due to indirect water supply from precipitation,electrical conductivity values fluctuated with groundwater levels within a certain range.

关 键 词：洛惠渠 地下水位 电导率 MORLET小波 

分 类 号：S19[农业科学—农业基础科学] P342[天文地球—水文科学]