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为了计算保定地区生态需水量,建立了地下水模拟模型.模拟结果表明,研究范围每年需要消耗0.64亿m3左右地下水,水位呈持续下降趋势.为了调控潜水地下水位,达到生态恢复的目的,模拟了减少开采量和扩大白洋淀面积到1975年水平的情况,结果表明当地下水开采量减少1.47亿m3时,每年补给地下水贮存量的水量约0.8亿m3,使得地下水水位大面积恢复,很大范围达到了潜水生态标准.根据此水位计算的生态亏空量约为15亿m3.该研究成果对我国的半湿润半干旱地区地下水生态环境恢复有借鉴意义.
In order to calculate the ecological water requirement in Baoding area, a groundwater simulation model was established.The simulation results show that the study area needs to consume about 64 million m3 of groundwater each year, and the water level shows a continuous downward trend.In order to control the diving groundwater level and achieve ecological restoration, Mining and expanding the area of Baiyangdian to the level of 1975, the results show that when the amount of groundwater exploitation is reduced by 147 million m3, the annual recharge of groundwater is about 80 million m3, which results in a large area of groundwater level recovery and a great deal of diving According to this level, the ecological deficit amount is estimated to be about 1.5 billion m3, which is of significance for the restoration of groundwater eco-environment in semi-humid and semi-arid areas in China.