Forecasting And Exploitation Underground Water Resources In Shangzhi City Based On Visual MODFLOW

Shangzhi city in Heilongjiang province is as well as the other northagricultural areas that it faces many crisis，such as the shortage of fresh waterresources, water pollution and flooding, even the increasingly prominentcontradiction between supply and demand. It directly affects the local economicdevelopment and social stability. In recent years, shangzhi area production andliving has been rely on surface water and groundwater in the shallow water. Dueto the economic development and population growth, urban water demandincreased year by year, the original water supply cannot meet the needs of themining water source, water quality is also varying degrees of decline that alsoaffects the safety of water supply. Thus, this article is mainly studying for thegroundwater resources evaluation and research in the northeast of the researcharea, aiming at looking for the good groundwater source to solve the currentproblem.According to Shangzhi water supply hydrogeological detailed survey data,this paper analyze the quaternary geological structure, the hydrogeologicalcharacteristics to establish the hydrogeological conceptual model, thegeneralized aquifer structure, the boundary conditions and the selection ofhydrogeological parameters. According to pumping test and underground waterlevel dynamic data, this paper calculated the hydrogeologic parameter,delineated the rich water area, water source exploration area and miningpurpose layer, the groundwater resources in the area, and allow production iscalculated, and the evaluation of groundwater resources. Through the waterquality test results, it evaluated the domestic water and boiler water in thestudied area.The simulation was calculated by visual MODFLOW software to establishthe hydrogeological conceptual model and mathematical model. And through themodel identification and verification, we established the accuracy of thecalibration model. According to the calculated values and measured values ofgroundwater head contour in whole achieved a good fitting, it stated thegeneralized aquifer structure, the boundary conditions and the selection ofhydrogeological parameters are reasonable, the model can truly reflect the localhydrogeological conditions. In order to testify the correctness of the model, theinitial conditions and boundary conditions are the same, the precipitation datawas validated by using the measured data, the results show that the model fittingeffect is good, that is the model can truly reflect the local hydrogeologicalconditions,the underground water level can be predicted. Through theestablishment of groundwater flow numerical model and set up different miningschemes, predict the changes of groundwater flow field of the next decade trend,analysis of groundwater resources development potential, ultimately rationalmining scheme is given. And the second plan was considered the best plan.According to the groundwater resources evaluation and prediction ofgroundwater numerical simulation, we determined the reasonable mining scheme, selected mining exploration target area of groundwater, predicted andevaluated the situation of the groundwater environment in the studied area,established health protection zone, water source protection scheme is putforward. The establishment of health protection zone can prevent contaminatedgroundwater resources, reduce the negative effects on the local ecologicalenvironment.