北京是一个以地下水为主要供水水源的大城市,目前总供水量已超过40亿米~3/年。其中地表水的取水量仅占三分之一;地下水开发已近最大限度。随着水资源的进一步开发,地表水资源的比例将相应提高,同时地表水和地下水必将联合使用。但是由于目前水利部门专管地表水,而地质部门只管地下水,所以本区水资源尚处于地表水和地下水各自独立的开发状 Beijing is a big city where groundwater is the main water supply source. At present, the total water supply has exceeded 4 billion m 3 / year. Among them, surface water takes up only about one third of the water and groundwater has been developed to its maximum extent. With the further development of water resources, the proportion of surface water resources will be correspondingly increased, meanwhile the surface water and groundwater will be combined. However, due to the fact that the water conservancy department specializes in surface water and the geology department is only for groundwater, the water resources in this area are still in a separate development status of surface water and groundwater