区域地质环境质量综合评价及应用研究

Assessment of regional geological environmental quality and its application

在地质环境质量评价研究中,地质环境分析方法的研究有待于进一步深化,需要探索一些更为具体、可操作性的方法。层次分析法是一种定性与定量相结合的多目标决策分析方法,是快速解决地质环境这种目标结构复杂问题的有效途径。文章以广东省恩平市地质环境质量评价为例,运用层次分析法对影响地质环境的因素进行分析,并利用GIS分析与层次分析法进行耦合,探讨其在地质环境质量评价中的应用。研究中选取坡度、岩土体类型、地质构造、年降雨量、人类活动等作为地质环境质量的评价因素,并提出了这些因素的提取与获得途径。通过计算机进行网络剖分及空间分析叠加,计算每个单元的质量评价指数,生成地质环境评价等值线,得出在整个研究区域内地质环境质量评价图。

It is necessary to put forward more concrete and accessible analysis methods in studying geological environment and needs concrete feasibility in the practice. Analytic Hierarchy Process is a multi-goal decision-making method with qualitative and quantitative analysis, also an effective way to resolve geological environmental problems with complicated structure. Taking Enping City in Guangdong Province as example, the paper takes advantage of AHP to analyze the factors which affect the geological environment, AHP and GIS are coupled to discuss the evaluation of suitability in the quality of geological environment. In the research, slope gradient, geological structure, rock and soil type, rainfall and human activities are selected and it gives the way how to acquire the factors. Supported by GIS in grid meshing and factors overlaying , we can get the comprehensive evaluation index to express the quality of geological environment in every unit, then get the isoline of evaluation index, the picture of geological environmental quality is completed.