基于GIS的山西省矿产资源规划环境影响评价

基于目前我国矿产资源规划编制过程中的环境评价,提出了一种基于GIS(Geographic Information System)技术,实现矿产资源规划环境影响定量评价方法。在对规划区环境现状进行大尺度综合评价的基础上,利用GIS的空间分析功能,有针对性的实现规划区敏感环境保护目标的筛选、环境影响范围的确定和矿产资源开发对环境保护目标影响程度的定量表达。结合山西省矿产资源规划方案,根据山西省各区域资源开发对敏感保护目标的影响特征,在定量计算各区域环境现状综合评价分级的基础上,分别对其生态环境、水环境、地质环境等方面的影响进行评价和预测,结果显示:山西省矿产资源规划空间布局总体合理,不会对敏感环境保护目标造成严重破坏,但部分矿产资源开采区距离保护目标较近,需要在矿产资源规划实施中加以保护。提出的评价方法较好地兼顾矿产资源开发与区域环境保护,可以有效地提高矿产资源规划环境评价结果的准确性和科学性;该方法可以综合地、定量地评价矿产资源规划对不同环境保护目标的影响程度和范围,为矿产资源规划方案的修订提供有价值的参考。

A method of environment assessment of mineral resources planning for shanxi provinces base on GIS

With the rapid development of economy in demand for mineral resources, it is becoming more and more important to coordinate the relationship between mineral exploration and environmental protection. To abate the environmental impact on the mineral exploitation, one of the most important means is to assess the environmental impact of mineral resources planning. The ultimate objective of plan environmental impact assessment is to ensure that assessing conclusions and environmental consequences are combined into strategic decision-making process. Planning environmental impact assessment is the only type of strategic environmental assessment that is required to be conducted in plans by Chinese Environmental Impact Assessment Act. Mineral resources planning have just issued in China, and are still on the exploratory stage. Those studies are mainly focused on improving the evaluation system, exploring the evaluation methods and so on. Quantitative analysis of environmental effects and processing of spatial information are the most difficult procedures which have no generalized evaluation approaches at present. The commonly applicable methods falls into several catalogues in previous studies of environmental impact assessment on mineral resources planning. Analytic hierarchy process (AHP), multi-objective analysis and expert judgment method are often used to select assessment indicators. Those methods can be applied to identify, forecast, and analyze potential environment impact when mineral resource planning is brought into effect. However, it is difficult to evaluate the impact of the changes of mineral development structure for their deficiencies in processing of the regional spatial information and synthetic analysis of multiple attribute information. The deficient methodologies have become a restriction to the actual impacts evaluation of mineral resources planning.According to the current situation of environment impact assessment for mineral resources planning, this paper proposes the quantitative assessment method for environmental impact of mineral resources planning based on GIS. The present situation of environmental evaluation process in the study area is established firstly, mainly includes: the division of evaluation unit, the establishment of evaluation index and evaluation classification, and the selection of evaluation model. Using the above indicators and models, large scale of quantitative evaluation for the present situation of environment in the study area is presented. Based on the results of the study area mineral resources planning large-scale comprehensive quantitative assessment, the identification and selection of environmental impact factors are introduced, the model and system for environmental assessment is set up in this research. In this paper, taking the environmental assessment of mineral resources planning in Shanxi Province as example, the approach is introduced in detail. Through spatial analysis methods provided by the GIS technology, the environmental impact of mineral resources planning to ecological environment, water environment, geological environment and atmospheric environment are given quantitatively. Based on the results of the environmental assessment of mineral resources planning in Shanxi Province, some valuable suggestions are proposed in this research. The example shows that the GIS are a very efficient and practical method for environmental assessment of mineral resources planning. It cans provide reasonable analysis processes, quantitative and visual results, which makes the environmental assessment more accurate and scientific.