Exploitation and Utilization Planning of the Groundwater Resources in Dongdagang Area

The area of Dongdagang of Nanyang city, Henan province is 2 761km~2, of which 23%, 55% and 22% area is mountain, hillock and plain respectively. Annual recoverable mining groundwater is 9 877.66×10~4m~3 within Dongdagang. Shallow groundwater is 9 184.87×10~4m~3, of which 42.0%, 22.5% and 28.4% is distributed in mountain, hillock and plain areas, respectively, and the deep groundwater is (692.79×10~4m~3). The distribution of groundwater is not uniform. Overall groundwater exploitation amount is (6 639.68×10~4m~3) in 2000 and 66% shallow groundwater (22% in plain area and 44% in hillock )and 34% deep groundwater are exploited. The groundwater is so serious shortage in the rock and hillock area that the questions of geological circumstance (eg. water level fallen seriously and the water quality changed badly in the hillock) have happened. With the large increase of population and the development of industry and agriculture at the Dongdagang region in Nanyang, the amount of groundwater exploitation has rapidly increased and serious environment issues have occurred. To obtain the aim of environmental protection, sustainable exploitation and utilization of the groundwater, exploitation and utilization planning of the groundwater are established on the base of analysis of actual and potential amount of groundwater resource. First, the exploitation potential is analyzed to gross of shallow and deep groundwater of hydro-geological unit. Second, the planning is constituted by the early or late sequence of drinking water for human and livestock, agriculture irrigation water requirement and industrial water consumption. The planning of shallow groundwater is plotted four regions and four sites by the gross, five regions by the drinking water for human and livestock and five regions and four sites by agriculture irrigation water requirement. The added exploitative springs are distributed in Heilong, warm, Dasongzhuang and Yaowan springs. But the deep groundwater is plotted five regions by the gross and can not be abused except the drinking water for human and livestock. It suggests that groundwater in plain area (abundant groundwater) be exploited and used in sustainable perspective and the groundwater of rock and hillock areas (seriously shortage groundwater) are filled by artificial recharge of groundwater.