Estimation of excess pumping of shallow groundwater aquifer in Haihe Plain
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Abstract:
By collecting groundwater table data of shallow aquifer of each province in Haihe plain and applying ARCGIS technique, the groundwater table contours in the end of year 1959, 1984, 2005 to 2013 were plotted. The results were checked by independent data sources and proved reliable. Then the quantity of the excess pumping of groundwater was estimated according to the depression cone and specific yield of aquifer. The results showed that cumulative over-exploitation of shallow groundwater aquifer of the Haihe plain was 979.45×108 m3 in 1959~2013，the average water table lowered by 10.99 m. Temporally, the annual over-exploitation was 16.34×108 m3 and the cumulative average water table lowered by totally 3.93 m, the annual average water table lowered by 0.141 m in 1959~1984; and 21.21×108 m3 and 6.28 m, 0.299 m respectively in 1984~2005; 15.67×108 m3 and 1.05 m, 0.131 m in 2005~2013. It should be noted that over-exploitation of groundwater in Haihe plain mainly occurred in the period from 1984 to 2005, and the over-pumping has been controlled effectively in recent years. Spatially, the depression cone was located mainly in cities which are in sub mountain region and consume relatively more groundwater, especially in Shijiazhuang city and Xingtai city in the west of the Ziyahe plane.
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