堤防截渗墙加固对圩区地下水水质的影响

为了研究圩区堤防截渗墙封闭率对圩区内地下水水质的影响,以江西省赣抚圩区大堤为研究对象,通过野外试验分析,并运用Visual MODFLOW计算软件对大堤在截渗墙不同封闭率条件下地下水水质的变化趋势进行了数值模拟.结果表明:现状封闭率(0.75)不会造成地下水中总氮累积超标,封闭率的合理选择可以缓和堤防加固与圩区水环境之间的矛盾.

Influence of reinforcement of cut-off walls for dikes on groundwater quality of polder areas

To study the influence of the closing ratio of the cut-off walls for dikes in the polder areas on the groundwater quality,the dike of Ganfu polder area in Jiangxi Province was taken as a case.Based on the field tests,the changing trend of the groundwater quality under different closing ratios of the cut-off walls was simulated by use of the software Visual MODFLOW.The results show that the existing closing ratio(0.75) will not lead to the excessive accumulation of TN in groundwater,and the reasonable closing ratio of the cut-off walls may mitigate the contradiction between the water environment in the polder areas and the reinforcement of the dikes.