本文選題：地下水 + 補(bǔ)給來源與演化　； 參考：《干旱區(qū)地理》2017年01期

【摘要】：針對石油河流域所包含的赤金盆地與花海盆地,綜合利用地下水水化學(xué)指標(biāo)與穩(wěn)定同位素技術(shù)系統(tǒng)地研究了地下水的補(bǔ)給來源與演化規(guī)律。其中赤金盆地地下水化學(xué)演化受控于溶濾作用,方解石、白云石、石膏等不斷地溶解進(jìn)入低礦化度的地下水中導(dǎo)致Mg2++Ca2+與HCO3-+SO42-沿1∶1等量線分布;而花海盆地高礦化度地下水中的Na+與SO42-、Na+與Cl-均有較好線性關(guān)系且多數(shù)礦物飽和指數(shù)1,表明芒硝溶解控制了地下水中主要離子成分且地下水演化過程轉(zhuǎn)由蒸發(fā)濃縮作用主導(dǎo)。赤金、花海盆地地下水氫氧同位素沿祁連山大氣降水線分布或于右下方,二者特征相似,但后者更為富集重同位素,反映研究區(qū)地下水主要補(bǔ)給來源為祁連山大氣降水或石油河河水;此外,兩盆地間水力聯(lián)系緊密,前者補(bǔ)給后者,因此在水資源開發(fā)利用時應(yīng)將兩盆地作為整體進(jìn)行統(tǒng)籌管理,避免不合理開采造成環(huán)境地質(zhì)問題。
[Abstract]:Aiming at the Chijin basin and Huahai basin contained in the oil river basin, the recharge source and evolution law of groundwater were systematically studied by using the hydrochemical index of groundwater and the stable isotope technique. The chemical evolution of groundwater in Chijin basin is controlled by leachate, calcite, dolomite, gypsum, and so on, which leads to the distribution of Mg2 Ca2 and HCO3- SO42- along the 1:1 isobaric line. However, there is a good linear relationship between Na and so _ 42-N _ (Na) and Cl _ (-) in high salinity groundwater in Huahai Basin, and the saturation index of most minerals is 1, which indicates that the dissolution of glauberite controls the main ionic components in groundwater and the evolution of groundwater is dominated by evaporation and concentration. The hydrogen and oxygen isotopes of groundwater in Chijin and Huahai basins are distributed along the precipitation line of Qilian Mountains or on the lower right. The characteristics of them are similar, but the latter are more enriched in heavy isotopes. It reflects that the main source of groundwater recharge in the study area is the precipitation of Qilian Mountains or the oil river water, in addition, the hydraulic relationship between the two basins is close and the former recharge the latter. Therefore, the two basins should be managed as a whole in the development and utilization of water resources. Avoid environmental geological problems caused by unreasonable mining.
【作者單位】： 中國科學(xué)院地質(zhì)與地球物理研究所中國科學(xué)院頁巖氣與地質(zhì)工程重點實驗室;中國科學(xué)院大學(xué);
【基金】：中國博士后科學(xué)基金資助項目(2016M591247)
【分類號】：P641.6

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