公路建设中不同因素变化对湿地水系连通性的影响

发布时间：2018-06-07 23:18

本文选题：公路建设 + 湿地　；参考：《北京师范大学学报(自然科学版)》2017年02期

【摘要】：水系连通性对于湿地生态系统的重要性主要表现在生态系统完整性、水流状况、水质及生物多样性等方面,湿地水系连通性状况越好,湿地的自净能力和纳污能力就越强.本研究以吉林省延边地区珲乌高速公路八家子路段作为研究区,结合影响湿地水系连通性的因素,利用Visual Modflow建立了基于数值模拟的地下水水流模型和地下水溶质迁移模型,模拟并预测不同因素的变化对湿地水系连通性产生的影响.依据模拟结果,对比分析公路与水流方向的夹角变化、路基填筑方式的不同、区域地层分布特征的不同对湿地水系连通性的影响大小,以识别公路建设中影响湿地水系连通性的关键因素;并从保障水系连通性和路基稳定性的双重目的出发,针对不同要素,提出公路建设中湿地水系连通性的保护技术.
[Abstract]:The importance of water system connectivity to wetland ecosystem is mainly reflected in ecosystem integrity, water flow status, water quality and biodiversity, etc. The better the connectivity of wetland water system is, the stronger the self-purification ability and the ability to absorb pollution of wetland are. In this study, a numerical simulation model of groundwater flow and groundwater solute transport model was established based on Visual Modflow, taking Bajiazi section of Huibian Expressway in Yanbian area, Jilin Province, as the study area, and combined with the factors affecting the connectivity of wetland water system. The influence of different factors on wetland water connectivity was simulated and predicted. According to the simulation results, the changes of the angle between the highway and the flow direction, the different filling methods of the subgrade and the influence of the regional stratigraphic distribution characteristics on the connectivity of the wetland water system are compared and analyzed. In order to identify the key factors that affect the connectivity of wetland water system in highway construction and to guarantee the connectivity of water system and the stability of roadbed, the protection technology of wetland water system connectivity in highway construction is put forward in the light of different factors.
【作者单位】：广西师范大学环境与资源学院;北京师范大学水科学研究院;
【基金】：西部交通科技建设资金资助项目(20113186701290) 广西师范大学重点科学研究计划资助项目(2014ZD007)
【分类号】：U415

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