基于GMS鄱阳湖拟建枢纽对地下水影响探讨

针对拟建鄱阳湖水利枢纽工程对地下水影响问题,选择赣江三角洲为代表区,采用资料收集、野外调查、统计分析和数值模拟等方法进行研究。依据地质钻探资料、地下水与河流动态关系、区域数字高程模型,结合鄱阳湖历史形成与演化过程确定研究区边界条件,运用GMS模拟软件建立了研究区地下水三维运动模型。依据推荐的枢纽调度方案,利用数值模型计算枢纽运行后对地下水运动影响的时空变化规律。结果表明:枯水年份影响大,距离河流、坝址近的地方影响大,反之亦然。影响幅度范围0~2m,地下水径流交替因此减弱,丰水年份土壤潜育化面积增加9.3%。

Discussion on Effects of Proposed Water Structure on Poyang Lake Groundwater Using GMS

In this paper, the historical data,field survey, statistical analysis, numerical simulation were adapted, and Canjiang River Delta wasselected as typical researeh area to aim at the efects of a water stucture on the groundwater in the Poyang Lake Basin.The boundary conditionswere determined based on regional geological and hydrogeologicaldata, dynamic relationship befween groundwater and river,regional digital ele-vation model, and historical formation and evolution of the Poyang Lake. A three-dimensional groundwater flow model for the study area was er-tablished using CMS software. Then, the flow model was used to simulate the structure impact on the groundwater aceording to the schedulingscheme of thestructure. The results show that there are big impact in dry years,large effect on the places near the river and dam, and vice versa.Thegroundwater level raised -2m, groundwater runoff altermately decreased, and soilgleization area increased by9.3% in wet year.