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世界各国经济的发展使工农业的需水量增加很快,一些地区感到水量不足;有些地方用地下坝拦截地下水,效果很好。如法国马赛的米乌港附近和意大利的阿尔坎塔尔河流域等。在印度克腊拉州刮季风的雨季,地下水位可能上升3—4米。为了满足旱季需水,除采取水库蓄水外,还用地下坝拦截雨季地下径流。地下坝应建在狭窄河谷地带,挡水墙高出含水层,并深埋至岩基。土层应具有较高的出水率,当地有足够的雨量保证提供丰富的地下水及冲洗岩石中的盐。地下坝只是一个不透水
The economic development in various countries in the world has led to a rapid increase in water demand for agriculture and industry, insufficient water supply in some areas, and groundwater damming in some places, which works well. Such as the French Miu Miu port in the vicinity of Italy and the Al Cantal River basin. During the monsoon rainy season in Kerala, India, groundwater levels may rise 3-4 meters. In order to meet the water demand during the dry season, in addition to the reservoir water storage, but also with the underground dam to intercept rainy season underground runoff. Underground dam should be built in the narrow valley, retaining wall above the aquifer, and buried deep to the rock foundation. The soil layer should have a high rate of effluent, and there is enough rainfall in the area to provide abundant groundwater and flush the salt in the rock. The underground dam is just a watertight