The Research On The Simulation With Prediction Of The Groundwater Level And The Rational Utilization Of The Water Resource In Panjin Area

The thesis was put forward from the item of Groundwater Environment Investigation in Liaohe Oil Field, which was charged by Prof. Tangjie. It was systematically summed up that the groundwater background, hydrogeology characteristic, utilization of water resources and the main environmental problems. On the basis of the regional geology and hydrology, it was numerical simulated and predicted that the groundwater level of Panjin area. The thesis was written to protect and reasonably exploit the groundwater resources, to analyze and evaluate the space-time rules and the groundwater movement trend, which provided scientific foundation to government in constituting relative policy, and served for the sustainable exploitation and utilization of groundwater, city economy and social sustainable in Panjin Area. The cross application of sciences domain was involved in the study content of the thesis that the geology, hydrology, environmental science, modern applied math and computer technology. Based on the analysis to the study states of groundwater system and groundwater numerical modeling at home and abroad, Visual Modflow3.10 was originally adopted to build up the groundwater level numerical simulation model of deep groundwater in double layers, which achieved the visible of the groundwater, predicted the change of the groundwater level in the area in the next 15 years, and the groundwater optimize exploitation projects was established at last. The accomplishment of the thesis could impulse the water resource management in Panjin area, and it could be popularized to the research and production in other similar area that the achievement in the thesis, which was theoretic valuable and reference significant to the management and proper exploitation of the water resources. The thesis was composed with introduction, general situation, hydrogeology conditions, building up of groundwater level numerical modeling, prediction of groundwater level, analyzing of depression cone, forecast of supply and need, and the study on exploitation project in reason. The thesis mainly introduced the subject evidences, meanings, status quo of research at home and abroad, and research technique route as well. It was nailed down that the study intention and the written thought in this part, which was the guide of next parts. The geography of Panjin area was described in the general situation part in the study area, such as position, district, weather and hydrology, terrain, soil, physiognomy, and so on. It was analyzed in emphasis that the geological conformation and stratum lithology of Panjin. Under the largely deep sediment of the Quaternary stratum in the area, it was the later Tertiary stratum that included Minghuazhen Group and Guantao Group. The groundwater mainly enriched in pore of the Quaternary relax-rocks and the fissure-pore in Later Tertiary fragmentary rock. To describe the hydrogeology conditions, it was analyzed that the hydrology condition of recharge, flow and drainage, and summed up the groundwater enriched character of hydrogeology, groundwater dynamic and hydrochemistry, which was the basic of the numerical simulation model. It was the most important part that the groundwater level modeling, which divided into three parts. The first part was the concept model of hydrogeology. Under the analysis to the groundwater hydrodynamic character and the boundary of the account area, hydrogeology condition was generalized, and it was brought forward that the hydrogeology conceptual model ingroundwater system. Account area was generalized into three stratums, from upper to down, they were Minghuazhen Group aquifer, middle aquifuge and Guangtao Group aquifer, which were all generalized to be heterosphere, differ thick and anisotropy. The groundwater movement in multiplayer medium aquifer system was accorded with the Darcy's Law, and the flow was planar and transient flow. The second part was the build up and the solution to the numerical simulation model. Using the software of Visual Modflow, analyzed and divided the account area, imported the text of surface and bottom elevations of the stratums, added 203 wells in Minghuazhen Group and 233 wells in Guantao Group, fixed on conductivity in 23 and Storage in 37 subareas, assigned the boundary, and built up the groundwater numerical simulation model. Then Finite Different Method was chosen to solute the equation. The third part was the identification and validation of the model. The numerical simulation model of the groundwater level was credible after identification, and could be used to predict the water level. It was the application of the model that the water level prediction and the analysis of the depression cone. According to the programming under actual exploitation and using the model, the water level prediction and the analysis of the funnel descent trend was done to predict the water level change instance of the Panjin area in next 15 years, and analysis the spread speed and water level changing range of the regional decent funnel of two aquifers. Then the results were educed that under the condition of actual exploitation, the area of the Pandong funnel in Minghuazhen Group was spreading at the speed of 2.68km2/a, and it would be 290.15 km2 at the end of 2019. The area of Xinglongtai funnel in Guantao Group would be 1107.634 km2 by 2019, and the spread speed was 4.73 km2/a. The exploitation distribution programming was done by analysis of the results. The exploitation programs for different regions in Panjin area provided the foundation to the institution of the...