地理学报 ›› 2003, Vol. 58 ›› Issue (6): 854-860.doi: 10.11821/xb200306008

• 生态系统与地表过程 • 上一篇    下一篇

新疆渭干河流域地下水含盐量的时空变异特征

苏里坦1,2, 宋郁东1, 张展羽2   

  1. 1. 中国科学院新疆生态与地理研究所,乌鲁木齐 830011;
    2. 河海大学水利水电工程学院,南京 210098
  • 收稿日期:2003-06-10 修回日期:2003-08-18 出版日期:2003-11-25 发布日期:2003-11-25
  • 作者简介:苏里坦 (1973-), 男, 在读博士, 主要从事干旱区水资源与生态环境研究。E-mail:sultandr2000@yahoo.com.cn 或 sultan77@sina.com
  • 基金资助:

    国家重点基础研究973项目(G1999043506)

Study on the Spatio-temporal Variation of Groundwater Salt Content in Xinjiang Weigan Catchment

SU Litan1,2, SONG Yudong1, ZHANG Zhanyu2   

  1. 1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China;
    2. College of Hydropower and Water Conservancy Engineering, Hohai University, Nanjing 210098, China
  • Received:2003-06-10 Revised:2003-08-18 Online:2003-11-25 Published:2003-11-25
  • Supported by:

    National 973 Program for Basic Research, No.G1999043506

摘要:

对面积约3 408 km2的渭干河流域地下水含盐量进行取样检测,应用地质统计学方法对取得数据进行了半方差函数分析。结果表明,该地区1998、1999年地下水含盐量变异函数曲线的理论模型符合球状模型;1997年、2000年地下水含盐量变异函数曲线的理论模型符合有基台线性模型。通过对1997年、1998年、1999年及2000年水样的分析,得出该地区地下水含盐量在时间与空间上皆存在明显变异性的结论。在空间尺度上,地下水含盐量从研究区的西北向东南方向有增加的趋势。从整体上看,研究区地下水含盐量东部高于西部;南部高于北部;东南部高于西北部。在时间尺度上,研究区东南部地下水随着时间的推移正向盐渍化加重方向发展。本文利用软件Geopack与Surfer7.0软件绘制了地下水含盐量的时空分布图,为该地区地下水盐分的管理与今后的防止盐渍化提供了决策依据。

关键词: 地质统计学, 地下水, 含盐量, 半方差函数, 克立格, 时空变异

Abstract:

Sampling and testing are conducted on the salt content of the groundwater in the 3 408 km2 of Weigan watershed and semi-variograms function analysis is made afterwards based on the available data by using the geo-statistical method. Results showed that the variance curves of the groundwater salt content in the years 1998 and 1999 display a spherical model, while the curves in 1997 and 2000 exhibit a linear model. Analysis of water samples obtained from 1997 to 2000 indicates that the salt content varies both temporally and spatially in this area. The salinity increases, in the spatial scale, from northwest to southeast of the research area, with east and south higher than west and north separately, and southeast higher than northwest. And the groundwater salinity in the southeast is aggravating with the elapse of time. Geopack and Surfer 7.0 softwares are used to work out a spatio-temporal variation map of salt content, thus providing basis for the decision-making on water-soil management and salinization prevention in this area.

Key words: geo-statistics, soil content, semi-variograms function, Kriging, spatio-temporal variation