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前言随着首都工农业生产的飞速发展,地下水的开发利用量也不断增长。尤其在城区及近郊区,目前地下水已过量开采。开采过额部份以消耗地下水储存量作为补偿,并导致地下水位不断下降。根据1956年～1974年地下水动态资料,地下水位平均每年下降0.5～1.0米,集中开采区为0.8～1.2米,同时生产井平均出水量也在逐年衰减,机井动力耗电逐年增加。所有现象均反映区域地下水的过量开采,造成地下水入不敷出。为了
Preface With the rapid development of industrial and agricultural production in the capital, the amount of exploitation and utilization of groundwater has also been on the rise. Especially in the urban areas and the suburbs, groundwater has been over-exploited at present. Excess mining takes the consumption of groundwater reserves as a compensation and leads to the continuous decline of groundwater table. According to the groundwater dynamic data from 1956 to 1974, the average groundwater level will drop 0.5-1.0 meters per year on average, and the centralized mining area will be 0.8-1.2 meters. At the same time, the average water discharge of production wells also declines year by year, and the power consumption of hydroelectric wells increases year by year. All phenomena reflect the over-exploitation of groundwater in the area, resulting in insufficient groundwater. in order to