Study On The Quality Of Geological Environment Of Gilong Basin

Geological environment is the most important part in the natural environment system which influence on living and development of human being;The quality of geological environment is the degree of adaption to development of the society-economy activity in the specific geology space. With the development of the national economy and implementation of the Western Development strategy, Tibet Autonomous Region's infrastructure construction is developing rapidly. In the course of Large-scale project construction, not only the weak ecological environment but also the fragile geology environment in Tibetan areas all suffered great challenge. This paper seeks to make a beneficial exploration in this field on how to evaluate the quality of regional geological environmental to serve the planning of construction.This paper takes Gilong basin which Gilong port locates in as the research object, and elaborate the physical geography as well as geological environmental conditions of the study area, i.e. meteorology, hydrology, topography and geomorphology, geological structure, stratum lithology, glaciers and human activities on the basis of field investigation and the analysis of existing data. The paper , based on the analysis of topography geomorphology and stratum lithology, combined with the geological background of Tibetan Plateau and capitalizing on geological analytical methods of present being a key to past, expounds and analyzes geological history .The paper also elaborates the environment geology condition and problems of Geelong basin.Based on the above analysis, this paper established assessment index system of geological environment, for the quality of geological environment as target layer , for the background conditions of geological environment and the problems of environmental geological as structural layer, for the seven factors which including landforms as program layer. The method of fuzzy comprehensive evaluation and analytic hierarchy process are applied to the quality of geological environment division of Gilong basin. The results of division corresponded to the actual survey basically. According to this kind of division result,and combined with the planning assumptions of Gilong port, the rationality of the plan of the building site layout as well as construction suitability are analyzed and evaluated. The appraisal method and research results have the significance of reference for the later similar planning and construction.