地下水过度开采引起的六价铬污染问题研究

发布时间：2018-03-04 17:50

本文选题：地下水　切入点：过度开采　出处：《节水灌溉》2016年12期 　论文类型：期刊论文

【摘要】：在无地表铬污染源的情况下,研究区从1997年到2010年间地下水中六价铬的检出率不断增大,超标率逐年升高,本次研究针对此现象进行了探讨。根据研究区近年来对地下水开发利用强度加大的实况,在分析历年水位及水质资料,通过试验研究非饱和带与饱和带松散沉积层土壤中六价铬的含量及其平面、剖面的分布特征的基础上,进行了地下水位动态特征与六价铬浓度变化规律之间在时空演变上的相关性分析。并通过回归分析建立回归模型,明确了地下水水位降低与六价铬浓度增加之间的非线性相关关系,探明了地下水过度开采引起六价铬污染的形成演化规律,并对地下水环境中六价铬的修复提供相关依据。
[Abstract]:In the absence of surface chromium pollution sources, the detection rate of hexavalent chromium in groundwater in the study area from 1997 to 2010 has been increasing, and the rate of exceeding the standard has been increasing year by year. According to the fact that the intensity of groundwater exploitation and utilization has increased in recent years in the study area, the water level and water quality data of the past years are analyzed. On the basis of the experimental study on the content of hexavalent chromium in the loose sediment layer of unsaturated zone and saturated zone, the distribution characteristics of hexavalent chromium in plane and section are studied. The correlation analysis between the dynamic characteristics of groundwater level and the variation law of hexavalent chromium concentration in time and space evolution is carried out, and the regression model is established by regression analysis. The nonlinear correlation between the decrease of groundwater level and the increase of hexavalent chromium concentration is clarified. The formation and evolution of hexavalent chromium pollution caused by over-exploitation of groundwater is proved, and the relevant basis for the remediation of hexavalent chromium in groundwater environment is provided.
【作者单位】：太原理工大学水利科学与工程学院;
【分类号】：X523

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