摘要
以地统计学经典理论分析了开孔河流域不同时期和不同地貌单元地下水矿化度在时间和空间的变异特征,揭示其浅层地下水含盐量的时空变异规律。对流域平原区约9 725 km2面积浅层地下水矿化度不同时期(1999、2003和2005年)的实测数据为基础,应用地质统计学方法,对取得的实测数据进行了半方差函数分析,得出该地区地下水矿化度在时间和空间上都存在明显的变异性。在空间尺度上,地下水矿化度在开都河中下游地区及其两岸灌区有增加的趋势,在孔雀河灌区沿流域方向自上而下逐渐加重,整体上看,孔雀河流域的地下水盐化要比开都河流域严重。在时间尺度上,研究区地下水随时间推移正向盐渍化加重方向发展。利用地学统计VARI-WIN2.2和MAPGIS6.5软件绘制了地下水矿化度时空分布图,为该地区地下水盐分的管理以及今后防止土壤盐渍化提供理论依据,也为干旱区地下水水质时空演变研究探索新方法。
Based on classic theory of geo-statistics,the authors analyze the variation characteristic of groundwater mineralization degree in time and space in view of different periods and different geomorphie units in Kaikong river basin, and reveal the rule of groundwater content salt spario-temporal variation. According to the observed data of shallow groundwater mineralization degree in different periods （1999, 2003 and 2005） in the 9 725 km^2 of Kaikong River basin, Xinjiang and semi-variance function analysis is made afterwards on the data obtained by the application of geo-statistics. Results show that the mineralization degree varies both temporally and spatially in the area. In the spatial scale, the mineralization degree of groundwater tends to increase in the medium-lower reaches of Kaidu River basin and its bank irrigation area, while the groundwater salinity is aggravation from top to bottom and as a whole, the groundwater salinity in Kongque River basin is more serious than in Kaidu River basin. And the groundwater salinity is aggravating with the elapse of time. VARIWIN2.2 and MAPGIS6.5 software are used to work out a spatio-temporai distributing map of groundwater mineralization degree, thus providing theory basis for make on groundwater-salt management and salinization prevention in this area.
出处
《水土保持研究》
CSCD
北大核心
2007年第2期293-296,共4页
Research of Soil and Water Conservation
基金
国家自然科学基金资助项目(40261008)
世界银行贷款项目(TBZJ-005)
关键词
地统计学
地下水矿化度
时空变异
半方差函数
开孔河流域
geo-statistic
degree mineralization of groundwater
spario-temporal variation
semi-variograms function
KaiKong River basin
