| Feicheng basin is an independent geological unit which is formed from the northernplains and the surrounding mountains as the main body, and located in the central andsouthern mountainous area of Shandong Province and the western of Mount Tai. The deepgroundwater has become the main water supply source and the only drinking water sources inFeicheng basin. In recent years, with continuous mining of deep groundwater and deepgroundwater pollution emissions increased year by year at the same time, the regionalgroundwater environment worsening. Therefore, using the scientific method to study the lawof space-time change, the countermeasures of reasonable exploitation and protection ofgroundwater in Feicheng basin, which above is particularly important to achieving sustainableutilization of groundwater resources and the sustainable development of regional economy ofthe Feicheng basinThe concrete research content and main research results are as follows:1. The groundwater dynamic analysis of Feicheng basinThis paper analyzed the year and the annual dynamic change of underground waterlevel in the study area and mastered the groundwater flow field distribution in detail of thisbasin which based on the environmental hydrogeologic condition of Feicheng basin. Thefollowing conclusions were concluded:(1) The hydraulic connection between the phreaticwater and deep water is small.(2) The karst groundwater level has trended down hastrended down.(3) The groundwater flow field have changed by the effect of human activity.2. The groundwater numerical simulation research of Feicheng basin.Groundwater dynamic simulation is the vital research of this paper. The knowledge ofhydrogeology, groundwater dynamics, geographic information systems and other relatedprofessional theory have been taken to establish the hydrogeological conceptual model andnumerical model after determining the scope of the study area, the structure of the aquifer andthe boundary of study area, using the software of Visual MODFLOW to solve the models ofthe study area. The groundwater numerical model which has already been recognized andvalidated can used in forecasting groundwater flow field of Feicheng basin in the future.(1) The identification and validation phase. Select the phase from January1,2008toDecember31,2009as this model identification phase, and the phase from January1,2010toDecember31,2011for this model validation phase. Combined hydrologic geology conditionsand topography with the character of the aquifer, the confined aquifer of the whole study isdivided into5permeability coefficient areas. At first, operates the model, identifies parameters of the model through measured and calculated water level fitting, at last validatethe model. The groundwater numerical simulation model established by verification is reliable,so it can simulate the present situation and predict the trend of future changes of groundwaterin Feicheng basin.(2) The predictive phase. At last, through forecast of the model, we drew the conclusionsof this study: level of water-table declines over the next six years under original conditions orgroundwater exploitation increase, however, if we reduce exploitation, the exploitation beganto rise again. Therefore, further control and mitigation of the water-table declines we shoulddevelop people consciousness of saving water,and rational decreasing of groundwaterexploitation.This paper analyzed the year and the annual dynamic change of underground water levelin the study area which based on the environmental hydrogeologic condition of Feichengbasin. Simulating and predicting the groundwater in Feicheng basin, then divide the citydrinking water resources to First-class nature reserve, Second-class nature reserve andProspective reserve. At last, put forward some measures of groundwater protection andmanagement and provide the scientific basis for the groundwater-sustained utilization tosupply water steadily. |
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