| Abstract: | Over the past decades, unplanning excessive exploitation gradually reduces the ground water resource in Jiaxing city where the second artesian aquifer is the main exploitation water bearing layer. As a result, a depression cone of groundwater level is formed around Jiaxing, and land subsidence has taken place. The central cumulative subsidence had been 709. 6 mm by 1994. Over the past 10 years,the average settlement exceeds 30 mm/a. The area of cumulative settlement that is more than 50 mm has been over 600 km2, which includes the total city proper and connects with county towns. The ground settlement does harm to flood control, drainage, city construction, communication and transportation around the area of Jiaxing. The preliminary estimation loss is about 1814 million yuan. Based on the dynamic monitoring data, the relations of groundwater exploitation amount, ground water table and ground settlement are established in this paper. Considering the situaion of economic development and surface water pollution, a regional planning of groundwater resouroe and reasonable exploitation quantity to 2010 are presenter. |
