宜昌长江南岸岩溶流域典型区三维地质建模

3D Geological Modeling in Typical Area of Karst Basin on the South Bank of the Yangtze River in Yichang City

宜昌长江南岸岩溶流域过河口地区存在库岸崩塌、工程性缺水、旱涝灾害、地下水污染、石漠化等水文环境问题,在地质资料匮乏的情况下,如何直观、立体、可视地表达水文地质结构特征,成为该地区地质灾害防治和环境保护等水文地质研究的难点。以宜昌长江南岸岩溶流域过河口地区作为主要研究区域,在分析研究区域地质环境概况与已有地质资料的基础上,基于QuantyView 3D平台,提出了一种以平面水文地质图数据为主的三维地质建模方法,构建了研究区的三维地质结构模型和水文地质结构模型,并依据地下水类型为水文地质结构模型赋值属性,以此划分了7个地下水类型。在此模型的基础上,通过对模型进行数据量算分析和模型空间结构分析等应用,为过河口地区水文地质研究提供了空间信息支持,揭示了地下水赋存空间和运动场所的基本结构特征,对地下水资源保护与利用具有重要的意义。

Hydrological environmental problems exist in the estuary area of the karst basin on the South Bank of the Yangtze River in Yichang City,such as bank collapse,engineering water shortage,drought and flood disasters,groundwater pollution and rocky desertification.In the case of lack of geological data,how to visually,stereoscopically and visually express the characteristics of the geological structure of water quality becomes a difficult point in the prevention and control of geological disasters,environmental protection and other hydrogeology research in this area.Taking the estuary area as the research area,this paper analyzes the geological environment of the existing geological data.Then,based on the QuantyView 3D platform,the paper proposes a three-dimensional geological modeling method based on planar hydrogeological map data,and constructs the hydrogeological structure model of the research area.According to groundwater types,the paper assigns attributes to the structural model and classifies groundwater into seven types.Finally,on the basis of the calculation of the model data and analysis of the model spatial structure,the paper provides spatial information support for hydrogeological study in the estuary area and reveals the basic structural characteristics of groundwater storage space and movement site,which is of great significance for the protection and utilization of groundwater resources.