Influence Of Seasonal Changes Of Rainfall On Groundwater Table In Yingshan Village Daoliu River Basin

Rainfallhas always been a focus of academic research in the field of hydrology and water resources?It is not only an important input parameter in hydrological model, but also an important consideration for the issue of flood control, disaster mitigation, runoff forecast, irrigation, etc.The Daoliu River basin is located in the WuMengShan District. It's belongs to the old revolutionary base areas. It's underdevelopment. The average rainfall of a year in the area is more than 1000 mm. It'sabundant.And yet,the local residents are facing water resources shortage. Local severe drought in 2011.For lack of perfect information and monitoring network of groundwater system, and it brings to more business. It's currently an urgent need to solve the problem to looking for good source of water for local people.To reveal the local groundwater dynamic change characteristics, and promote the development of groundwater resources combining with the field survey data, statistical analysis of data, and using the numerical simulation to predict the groundwater table.The geologic condition has carried on the detailed investigation.It'srevealed the areas of groundwater chemical type.The groundwater chemical typesare mainly of bedrock fissure water.Divided the water-bearing rock groups,we find T3 x under the main aquifer in the Jurassic sandstone and middle shaximiao group under paragraph(J2s1) sandstone.We found that the runoff discharge conditions of groundwater in the study area which are mainly accept atmospheric rainfall recharge. The works we'd done provides an important basis to establish a perfect groundwater monitoring system.We concluded that the seasonal changes of the local rainfall patterns based on a hydrological monitoring data of annual rainfall in the study area, and compared with years of average rainfall data. We set up a statistical model of rainfall infiltration coefficient changing with depth, and have carried on the fitting inspection, through the statistical analysis of rainfall infiltration coefficient. The above work provide important parameter basis for establishing hydro-geological conceptual model.Based on the geological conditions and the hydro-geological conditions of study area, we established the model in the study area.The boundary conditions and the source items are simplified.By use of numerical simulation software,wehas carried on the generalized, groundwater flow model, which to forecast the groundwater table under the seasonal rainfall condition.