摘要
以地统计学理论和焉耆盆地绿洲区浅层地下水矿化度不同时期(1960年和2005年)的实测数据为基础,对取得的实测数据进行了半方差函数分析,结果表明:焉耆盆地绿洲区地下水矿化度和埋深在时间和空间上都存在明显的时空变异性。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大的趋势;在时间尺度上,地下水随时间推移向盐化加重方向发展。近50年水盐动态表明焉耆盆地一直处于积盐过程,而绿洲区则处于脱盐过程,盐分都积累在博斯腾湖区,在1982年后转移至孔雀河流域。焉耆盆地地下水盐化态势表明,近年来地下水各项离子质量浓度都在积聚。绿洲区水土资源开发不仅改变了水盐分布,而且也深刻影响了地下水水体。
Based on classic theory of geo-statistics, this paper analyses the variation characteristic of groundwater TDS and depth in time and space, and reveals the rule of groundwater content salt spatiotemporal variation. According to the observed data of shallow groundwater TDS and depth in different periods （1960 and 2005） in the oasis area of Yanqi Basin, Xinjiang, semi-variance function analysis is made afterwards on the data obtained by the application of geo-statistics. The results indicate that the TDS and depth of groundwater varies both temporally and spatially in the area. In the spatial scale, the TDS of groundwater tends to increase in the medium-lower reaches of Kaidu River Basin and its bank irrigation area, while in the time scale, the groundwater salinity aggravates from top to bottom, or as a whole, aggravating with the elapse of time. The water and salt dynamics in recent 50 years show that abundant salt is accumulated in Yanqi Basin, while desalination happens in the oasis area of Yanqi, with the salt accumulated in the Bosten Lake, which has been transferred to oasis areas of Kongque River since 1982. the analysis of the eveolution characteristics of groundwater water indicates that each hydronium of groundwater is concentrated. The study confirms that the development of water and land resources has not only changed the distribution of water and salt, but exerted a profound impact on the groundwater.
出处
《地质科技情报》
CAS
CSCD
北大核心
2009年第5期101-108,共8页
Geological Science and Technology Information
基金
国家973前期研究专项"干旱内陆盆地绿洲区水盐演化规律研究"(2007CB416604)
水利部科技创新项目"新疆地下水资源可持续利用及保护的技术开发与应用"(200802050)
关键词
地统计学
水盐演变
时空变异
焉耆盆地
geo-statistic
water and salt evolution
spatio-temporal variation
Yanqi Basin
