本文選題：地下水　切入點(diǎn)：過度開采　出處：《節(jié)水灌溉》2016年12期 　論文類型：期刊論文

【摘要】：在無地表鉻污染源的情況下,研究區(qū)從1997年到2010年間地下水中六價(jià)鉻的檢出率不斷增大,超標(biāo)率逐年升高,本次研究針對(duì)此現(xiàn)象進(jìn)行了探討。根據(jù)研究區(qū)近年來對(duì)地下水開發(fā)利用強(qiáng)度加大的實(shí)況,在分析歷年水位及水質(zhì)資料,通過試驗(yàn)研究非飽和帶與飽和帶松散沉積層土壤中六價(jià)鉻的含量及其平面、剖面的分布特征的基礎(chǔ)上,進(jìn)行了地下水位動(dòng)態(tài)特征與六價(jià)鉻濃度變化規(guī)律之間在時(shí)空演變上的相關(guān)性分析。并通過回歸分析建立回歸模型,明確了地下水水位降低與六價(jià)鉻濃度增加之間的非線性相關(guān)關(guān)系,探明了地下水過度開采引起六價(jià)鉻污染的形成演化規(guī)律,并對(duì)地下水環(huán)境中六價(jià)鉻的修復(fù)提供相關(guān)依據(jù)。
[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.
【作者單位】： 太原理工大學(xué)水利科學(xué)與工程學(xué)院;
【分類號(hào)】：X523

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