水正在成为罕见的商品。人们已拥有在雨季尽可能多的保存水的手段和方法,把过多的水蓄存起来,当需要时可以利用。 为了保存和蓄存水,正像在地面上建筑水坝一样,建立地下水坝能够阻止水的流动,并把水就近蓄在土壤内。 Water is becoming a rare commodity. People already have the means and methods of preserving water as much as possible during the rainy season, storing too much water and using it when needed. In order to conserve and store water, just as the building of a dam on the ground, the establishment of an underground dam can stop the flow of water and store the water near to the soil.