On Berlin street corners you often see colored pipes winding along the pavements. Inside these pipes is groundwater pumped during the excavation from construction projects, and all these pipes lead to government designated groundwater recharging areas where the water is returned underground. At the same time the government keeps track of changing groundwater levels via a widespread system of monitoring wells.
柏林街頭常見蜿蜒人行道上的彩色管子，裡面裝的就是建築工地開挖時抽出的地下水，而這些管子都通到政府指定的地下水補注區，重新灌入地下；同時政府以滿佈各地的監測井追蹤地下水位變化。