Groundwater is being withdrawn, no longer as a buffer over the year, but in a structural way, mainly because water is seen as a free good.

地下水被消耗，不再像往年那样作为补偿用水，从结构方式上来看，主要是因为水资源被认为是免费商品。

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From the survey data, Berg's team created the first three-dimensional groundwater map, using statistical modelling to show levels that are relatively arsenic-free.

从调查数据中，研究团队制成了第一张三维地下水地图，用统计模拟的方式显示了与不含砷相关的水平。

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Seepage free surface issue exists in analysis of the seepage concerning geotechnical slope, earth dam, underground cave and groundwater movement.

在岩土边坡、土坝、地下洞室及地下水运动等渗流分析中，均存在有渗流自由面问题。

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