Numerical Simulation Of Groundwater System

1. The main work of this paperThe QianJin groundwater source is in DaQing of HeiLongJiang province, in the west of QianJin village, about one kilometer to QianJin village, southeast to RangHuLuPao, north to RangHuLu groundwater, south to DuLiTun groundwater, the area is 24.96 km2. This paper researches the QianJin groundwater source. The main work:(1) Researching and analyzing the geology and hydrology of the QianJin groundwater;(2) Analyzing and processing the static data of the QianJin groundwater, including well distribution, geologic and hydrographic conditions;(3) Investigating the dynamic data about well, including exploitation number, water level, the relationship between the exploitation number and the water level. Selecting the optimal scheme of exploitation;(4) Building three-dimensional mathematical model of the QianJin groundwater source, simulating and forecasting the situation of exploitation;(5) Proposing the best scheme of exploitation.Main work done:(1) Collecting, processing, analyzing and researching the data of the QianJin groundwater source;(2) Building the mathematical model of the area which is researched, and designing the optimal scheme;(3) Collecting the data of the QianJin groundwater source, solving the mathematical model, test the result;(4) Proposing the best scheme of exploitation.Key technologies:(1) Under the condition that the groundwater of several regions disturbs each other, we only research the groundwater of a certain region, including its borderland and the selection of a reasonable scheme of exploitation.(2) Using advanced international study result to obtain the hydrographic and circular conditions of the area which is researched.Creative point:(1) Some of the corresponding research of groundwater in QianJin area is stagnant;(2) The in-depth research about QianJin groundwater is needful;(3) How to obtain the relationship between geology and requirement, and the selection of the optimal scheme of exploitation is difficult.2. BackgroundAt present, there is about 100 groundwater source in DaQing, the total capacity is about 150×104m /d. How to exploit groundwater reasonably is a practical problem. 3Through the research, make the reasonable scheme of exploitation, avoid environmental and geological problem because of unreasonable exploitation. Use the limited groundwater scientificly and reasonably.Reasonable exploitation avoid water level falling suddenly. According to the research result, adopt effective measure to prevent groundwater environment to be bad.1) Adjust the original scheme of exploitation in the arearesearched; 2) Adjust the spatio-temporal distribution of exploitation, change the single scheme of exploitation;3)Uniform programming and management make groundwater continuable.3. Build and solve model3.1 The three-dimensional mathematical model of groundwaterAccording to hydrographic conditions and Darcy Theorem, we get the mathematical model: 3.3 Numerical solutionUse SOR subroutine package of MODFLOW (simulation software of groundwater) to solve, analysis and test the model.3.4 Test the modelUse monitoring data (2003.6.20-2003.12.20) to test the mathematical model. The results are very close to real data, so the mathematical model can forecast the situation of exploitation.4. ConclusionThis paper build the mathematical model of QianJin groundwater source, according to the model we can select reasonable scheme of exploitation and avoid excessive exploitation.