摘要
黄河下游为著名的地上悬河,河道两岸湿地分布广泛,研究截渗墙对悬河段地表水、地下水转化的影响,对于区域水资源开发利用、土壤次生盐碱化的治理以及沿岸湿地生态系统保护具有重要意义。根据黄河悬河段实际水文地质条件,通过识别典型断面黄河地表水、地下水、湿地水量交互机理及影响因素,在此基础上建立相应的水文地质概念模型及数学模型,利用Feflow软件模拟计算典型断面截渗墙深度对地表水、地下水、湿地相互作用的影响。结果表明,截渗墙使地表水、地下水转化量以及地下水、湿地水的转化量均减小,当截渗墙深度为25 m时,地表水、地下水转化量由原来的55.252 m^(3)/d减少为52.814 m^(3)/d,地下水、湿地水转化量由原来的25.286 m^(3)/d减少为21.981 m^(3)/d。并且截渗墙加深了地下水流路径的穿透深度,增大了地下水径流时间和地下水年龄,当截渗墙深度为25 m时,地下水年龄由1200~1600 d增大到1600~2000 d。研究结果可加强对黄河影响带内地表水、地下水转化机理认识。
The lower reaches of the Yellow River are famous aboveground suspended rivers,and wetlands are widely distributed on both sides of the river.It is of great importance to study the influence of cut-off wall on surface water-groundwater interaction in the perched section for the development and utilization of regional water resources,the treatment of secondary salinization of soil and the protection of wetland ecosystem.In this paper,based on the actual hydrogeological conditions of the Yellow River perched section,the interaction mechanism and influencing factors of the surface water-groundwater-wetland water volume of the Yellow River in typical sections were identified.On this basis,the corresponding conceptual model and mathematical model of hydrogeology were established,and Feflow software was used to simulate and calculate the influence of the seepage wall depth of typical sections on the surface water-groundwater-wetland interaction.The results show that the cut-off wall reduces the flux of water discharged from surface water to groundwater and from groundwater to wetland.When the depth of cut-off wall is 25 m,the conversion of surface water to groundwater decreases from 55.252 m^(3)/d to 52.814 m^(3)/d and that of groundwater to wetland decreases from 25.286 m^(3)/d to 21.981 m^(3)/d.In addition,the cut-off wall deepens the penetration depth of the groundwater flow path and increases the travel times and age of groundwater.Groundwater age increases from 1200~1600 d to 1600~2000 d when the cut-off wall is 25 m deep.The results of this study can strengthen the understanding of the interaction mechanism of surface water and groundwater in the Yellow River influence zone.
作者
张丽娟
袁子成
张盛艳
张阳
陈丹璐
Zhang Lijuan;Yuan Zicheng;Zhang Shengyan;Zhang Yang;Chen Danlu(Ecological Environment Geo-Service Center of Henan Geological Bureau,Zhengzhou 450053,China;Technology Research Center for Mine Environment Ecological Restoration Engineering of Henan,Zhengzhou 450053,China)
出处
《能源与环保》
2023年第6期13-18,25,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家自然科学基金(42102286)
河南省自然资源厅2020年度新立项目(2020-4)。
