Groundwater Resources Evaluation Of Shawang Well-field In Pingdingshan, Henan Province

The study area is located in the ShaWang Village, BeiDu Town, Which in the southeast of Pingdingshan City 3.5Kms.The source area of water is east of JinShan,west of QuZhang,south of NiuLou,North of Zhang Village,the surface area of it is 2.9km~2.Being the semi-arid continental monsoon climate, the average annual precipitation 734.59mm, with the average temperature of 15.1℃, WuJiang rivers - Cham River from the northwest to southeast through the region, there is Shahe, North Channel, East channel surface water。 The source area of water depth of 420 m within the main aquifer for Tertiary conglomerate, marl and Quaternary gravel bottom gravel layer. Purpose of the study is to Pingdingshan three hot and limited liability companies The proposed total installed capacity of 2 × 25 MW cogeneration project 1.5 × 10~4m~3/d water supply study. The study was based on the geology and mineral resources in Henan Non-ferrous Metals Geological Bureau 2nd Battalion of the sand Wangshuiyuan-water exploration above the foundation. Analysis of water through the aquifer to the distribution, lithology, thickness and water, water features and groundwater recharge, runoff, excretion conditions. Single-well pumping test taken more test wells and pumping wells pumping test group of three, use steady and non-steady flow for Senate. In the study area hydrogeological conditions of reasonable probability ... Established a two-dimensional groundwater flow steady flow mathematical model for numerical calculation, the model is solved, identification and testing, tested the use of a numerical model of water flow and groundwater exploitation vision simulation evaluation,argumentation groundwater mining conditions and guarantees;Sexual exploitation of the pumping test under the conditions of simulated changes in thegroundwater level is forecast during the exploitation of groundwater resources change. An evaluation of the existing water and the impact of agriculture, water and used a balanced method of comparative analysis. Numerical Calculation of mining conditions at the supply capacity of 828.25 × 104m~3/a, Excretion of 232.5 × 104m~3/a, have industrial and domestic consumption of 48.5 × 104m~3/a, recoverable resources of 547.5 × 104m~3/a. Prepared by the mining groundwater forecast program has decreased, the water level down deep in planning the largest mining wells Department, Planning for the center of production wells to form a funnel, the water level of five years ago. larger deceleration, the average deceleration 0.8m/a. After the reduced year by year, the fifth year to the end of the tenth year the average velocity 0.17m/a level, thirty years since the end of the funnel center of the water level drawdown 80.56m. water level within the maximum drawdown values remain deep in allowable value. Although the unit of production wells which the water level was continuing downward trend But to win groundwater outflow downstream and upstream interception of groundwater inflow, the water level downward trend is getting smaller and smaller, Finally moving toward stability, shows the full water supply to the water plant exploitation is guaranteed.