呼和浩特市平原区地下水水位动态与降水量及开采量的互馈效应

Interaction between Groundwater Level Dynamic with Precipitation and Exploitation Quantity in Hohhot Plain

通过研究呼和浩特市平原区内降水量,开采量,地下水位动态变化过程及特征,运用数理统计方法分析影响区域地下水水位动态变化的影响要素,进而揭示三者之间的互馈效应。结果表明,降水量对地下水位直接影响并不明显,它通过影响农业地下水开采量从而影响地下水位变化;开采量时增时减,水位却不断降低,其原因是开采量大大超出了地下水资源可利用量;通过对32年内降水量、开采量与地下水位之间的简单相关分析和回归分析,量化了降水量和开采量对地下水位的影响程度,得出开采量对地下水影响是显著的,远大于降水量的影响。

By a thorough research on the interaction between precipitation characteristics, changes in precipitation and water level dy- namic, mathematical statistical methods are used to identify the key elements of the influence of regional groundwater variation, and the mutual interaction effect among the three is revealed. We can conclude that the direct effects of precipitation on the groundwater level is not obvious, it can affect the groundwater level by affecting agricultural exploitation. Exploitation decreases or increases, the groundwater level continues to decrease, the reason is that the exploitation greatly exceeds the available amount of groundwater re sources. Through correlation analysis and regression analysis between rainfalls, exploitation and groundwater level in the 32 years, this quantifies the effects of precipitation and exploitation on groundwater level. The effect of exploitation on groundwater is signifi- cant, which is far greater than precipitation.