降水和开采变化对石家庄地下水流场影响强度

为能精确识别降水和开采对石家庄地下水流场影响强度，应用小波变换和相关分析等研究方法，对区域平均地下水位、地下水降落漏斗面积及中心水位与降水和开采变化之间的互动特征进行了研究。结果表明:① 1961—1973年期间，平均地下水位随降水量增大呈幂函数递减趋势；1974—2010年期间，降水量每减小100 mm，漏斗中心水位下降速率增大7.35 m，平均地下水位下降速率增大2.15 m；② 1961—1973年期间，开采量每增加1亿m3，平均地下水位下降0.28 m，漏斗面积扩大11.74 km2，中心水位下降0.52 m，1974年以来累计超采量每增加1亿m3，漏斗面积增幅1.52 km2，中心水位降幅0.18 m；③ 降水量每减小100 mm，降水贡献度减弱3.0%，人类开采影响强度增大2.76%。

Contribution degrees of precipitation and groundwater exploitation to the groundwater flow field in Shijiazhuang

In order to accurately identify the contribution degrees of precipitation and groundwater exploitation to the groundwater flow field in shijiazhuang, interactive features between the average water level, central level and area of groundwater depression cone and the precipitation and groundwater exploitation are studied through the methods of Wavelet Transform (WT) and correlation analysis. The results indicate that: ① During the period of 1961—1973, the average water level shows a power-function declining trend with increasing precipitation; during the period of 1974—2010, every decline in precipitation by 100 mm results in a rise in drawdown of central level of groundwater depression cone by 7.35 m and a rise in drawdown of average groundwater level by 2.15 m. ② During the period of 1961—1973, every rise in groundwater exploitation by 0.1 billion cubic meters results in a decline in average groundwater level by 0.28 m, a rise of 11.74 km² in area and a decline of 0.52 m in central level of groundwater depression cone; since 1974, every rise in cumulative amount of overexploitation by 0.1 billion cubic meters results in a rise of 1.52 km² in area and a decline of 0.18 m in central level of groundwater depression cone. ③ Every rise in precipitation by 100 mm results in a decline in contribution degree of precipitation by 3.0% and a rise in contribution degree of human exploitation by 2.76%.