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结合内陆干旱区地下水的特点,在地下水脆弱性评价的GOD法和DRASTIC模型的基础上提出DRAV模型,对新疆塔里木盆地孔隙潜水的脆弱性进行了评价。结果表明:塔里木盆地平原区地下水脆弱性指数在2~4、4~6、6~8和>8的区域面积分别占塔里木盆地平原区总面积的10.1%、80.4%、9.2%和0.2%;地下水脆弱性相对较高区域主要位于薄土层(包气带地表土壤层厚度为20~30 cm,其下部主要为砂砾石)和粉细砂层灌区,包气带中多缺失亚砂土和亚黏土,灌溉水入渗补给量较大;地下水脆弱性相对较低区域主要位于亚砂土和亚黏土层的非灌区,基本不存在灌溉水的入渗补给,大气降水补给也极其有限。
Based on the characteristics of groundwater in inland arid regions, the DRAV model was proposed based on the GOD method and DRASTIC model for groundwater vulnerability assessment, and the vulnerability of pore diving in Tarim Basin in Xinjiang was evaluated. The results showed that the area of groundwater vulnerability index in the plain area of Tarim Basin accounted for 10.1%, 80.4%, 9.2% and 0.2% of the total area of the plain in the Tarim Basin at the areas of 2 ~ 4, 4 ~ 6, 6 ~ 8 and> 8, respectively. The areas with relatively high groundwater vulnerability are mainly located in thin soil layers (the thickness of the surface soil layer in the aeration zone is 20-30 cm, the lower part is mainly gravel) and the silty sand irrigation area, the multi-depleted sandy soil in the aeration zone and In sub-clayey soil, infiltration of irrigation water is relatively large, while that of relatively low groundwater vulnerability is mainly located in non-irrigated areas of sub-sand and sub-clayey soil. There is basically no infiltration recharge of irrigation water, and recharge of atmospheric precipitation is extremely limited.