黑龙江杜尔伯特县节水增粮行动项目地下水资源分析与预测

在对节水增粮行动项目区的地质、水文地质条件进行研究的基础上,进一步分析了杜尔伯特蒙古族自治县节水增粮行动项目区地下水的补给条件和动态特征,对潜水和承压水资源量分别进行计算,对2015年进行供需平衡分析,采用开采强度法对地下水开采进行预测分析计算,采用水位恢复法预测地下水状况。计算结果表明:论证单元区地下水补给资源量为12 320.25万m3/a,可开采资源量为10 472.26万m3,总需水量为8 719.4万m3,需水量小于可开采量,各论证区可开采量均有剩余。采用开采强度法对水源地进行水位降深预测,在无补给且连续24天开采情况下,最大水位降深为1.82m,平均水位降深1.37m。从停止开采的24小时内动水位恢复迅速,从第10天以后水位回升缓慢,到第120天基本回复至初始状态。

Analysis on groundwater resources of the districts of Saving Water and Increasing Grain Yield in Dorbod Mongol Autonomous County of Heilongjiang Province

Based on the geological and hydrological conditions of the districts of Saving Water and Increasing Grain Yield the groundwater recharge condition and dynamic characteristics are analyzed in Dorbod Mongol Autonomous County. The groundwater resources are calculated, and meanwhile the balance between supply and demand in 2015 is also discussed. The groundwater exploitation is analyzed using the method of exploitation intensity and the condition of groundwater is predicted by water recovery method. The results show that the groundwater resources are 12 320.25×10^4 cubic meters per year, and the exploitable resources is 10 472.26×10^4 cubic meters. The total water demand in 2015 is 8 719.4×10^4 cubic meters, which is lower than the exploitable resources. In the 24-day mining condition without supply, the maximum drawdown is 1.82 m and the average drawdown is 1.37 m. The groundwater level recovers quickly within 24 hours. After 10 days, the groundwater level recovers slowly. And the groundwater is restoring the original basic level after stopping exploitation 120 days.