The Study Of Groundwater Flow Simulation And Management Model In The Arid Area Of Inner Mongolia

With the development of Northwest China, the groundwater resources have played a very important role in safeguarding the residents daily life, supporting the development of society and economy, keeping the ecological balance, etc. Water shortage problems are also becoming a bottleneck restricting the regional development. Groundwater of Zhandanzhao water source site in Dalate Banner, Ordos City, Inner Mongolia, is the main water source for urban life, therefore, reasonable water resources evaluation and an efficient development model is particularly important. For these reasons, this paper took Zhandanzhao water source site as the study area, carried out the following work:First, reviewed research status and history in the numerical simulation of groundwater flow and management model, clarified the problems and deficiencies , and prospected the trend, laid a good foundation for scientific, objective and accurate evaluation of groundwater resources and modeling reasonably.Second, in order to determine hydro-geological parameters in study area accurately, used nuclear magnetic resonance studying the water system, did nuclear magnetic resonance imaging tests; and carried out a pumping test of non-steady flow and the geological formation test by drilling hydro-geological holes; combined existing hydro-geological holes information, used different methods to determine the hydro-geological parameters of water source.Third, based on analyzed the geological and hydro-geological conditions of the study area closely, evaluated the recharge, discharge resources under the status quo conditions of exploitation of the study area. In accordance with mining scheme, the program group will be well over into rectangular regions, made use of exploitation intensity formula, accorded to the mining intensity and exploitation time, forecasted water level drawdown of cone of depression, determined the exploitable volume indirectly not to exceed allowable drawdown.Fourth, established hydro-geological conceptual model and groundwater flow simulation model of the study area by GMS6.0, used nuclear magnetic resonance, pumping test data and data of long viewed holes to identify parameters in the numerical model, achieved good results. In addition, this study also used a simulation model of groundwater flow, analyzed groundwater regime and resource composition under the conditions of fixed mining scheme. According to simulation results, provided technical supports and scientific bases for groundwater resources sustainable development.Finally, the study took groundwater flow simulation model as background, take Zhandanzhao water source site and Shulinzhao town as key study area, based on the comprehensive analysis of development plan in Shulinzhao town, considered coordinated development of development and utilization of groundwater resources system and society, economy and environment, exploited the maximum benefit of limited groundwater resources, established objective function based on maximal economic benefit with exploitation quantity, capacity of well, groundwater level, water demand and other constraints, solved by software, determined maximum allowable exploitation quantity of groundwater in study area, proposed optimal exploitation Schemes of Groundwater, by substitution of the optimization results into the mathematical model, forecasted the dynamic change trend of groundwater under the conditions of maximum allowable exploitation quantity.The application of the organic coupling between management model and simulation model, achieved the organic integration of time and space in the management of water resources, made the complicated groundwater flow problems more realistic, flexible, simple and easy to modified, the progress of the research, advanced the development of interactive program analysis research to some extent, and also expanded the development direction of water resources management in the future indirectly.