【摘要】 人工湖、库和河流等将改变区域水文循环过程,特别是地表水与地下水交换关系。本文对郑州市规划的龙湖入渗水利用和龙湖周边机井布设方案进行比较分析。龙湖水体形成后,湖区与周围地下水位的2.5m落差将使湖水大量入渗补给地下水,大范围抬升湖区周围地下水位,龙湖周围低洼处将有发生盐碱化的危险,威胁到紧靠龙湖的西部国家森林公园和规划中的东北部生态回廊绿地。本文利用美国地质调查局(USGS)颁布的三维地下水数值模型(MODFLOW),模拟不同湖底防渗措施和机井开采方案下龙湖周围地下水位变化以及龙湖入渗量,对龙湖周边布井方案可行性和降低地下水效果加以分析和比较。更多还原

【Abstract】 Artificial lakes, reservoirs and rivers will lead to changes of regional hydrological cycle, especially exchanges between surface water and groundwater. Measures of infiltration water utilization and ecological environment protections nearby Longhu were analyzed in this study. Large amount of water from the lake infiltrates into aquifer because water elevation of Longhu is 2.5m higher than its surrounding groundwater table. Groundwater table around the lake will rise significantly if no infiltration reduce measures will be taken. Therefore, salinization may occur in the lower area surrounding Longhu, which will influence forest and grass covers of the National Forest Park close to Longhu in the west and planned ecological greenbelt in the northeast. A three-dimensional groundwater numerical model (MODFLOW) was adopted to simulate groundwater variations and infiltration water from the lake considering different porous properties of lake sediments with and without groundwater withdrawal. Schemes of pumping well numbers and locations for intercepting infiltration water are compared.更多还原