【摘要】 本文选取兰州市(涵盖五区三县)作为研究对象,利用层次分析法和专家咨询方法优化生态环境状况评价指标体系和评价标准,选取其中1986、1995、2000和2007年这四年作为代表年,在GIS和RS平台下利用遥感影像、基础地理数据、及其他相关数据,对兰州市二十年来生态环境质量进行评价。计算得出兰州市生态环境质量指数在41.589 9-41.732 0之间,表明兰州市生态环境质量整体为一般,植被覆盖度中等,生物多样性为一般水平,较适合人类的生存。并系统分析了造成兰州市生态环境质量偏低的自然因素和人为的因素。基于以上,本文提出一些针对性的建议和对策,为兰州市未来生态环境建设提供参考。更多还原

【Abstract】 The index system and evaluation criteria published by Technical Criterion for Eco -environmental Status Evaluation is optimized by using analytic hierarchy process and expert consulting method,which is more suitable for Lanzhou.Eco-environmental quality in the recent 20 years of Lanzhou is assessed based on the index system,and the data of 1986,1995,2000 and 2007 are selected to represent the trend about the variety of eco-environmental quality.Using the platform of GIS and RS,the data of the index system are gained from remote sensing images,basic geographic data,yearbooks and other published materials.It is calculated that the eco-environmental quality index of Lanzhou city is between 41.589 9 and 41.732 0,which indicates that the eco-environmental quality of lanzhou city is general on the whole,vegetation coverage is medium,the biodiversity is at the general level,relatively suitable for human survival.The article analyzes the causes for the low eco-environmental quality of Lanzhou city systematacially,including natural factors and human factors.The paper also provides suggestions and strategies as references for further eco-environmental construction of Lanzhou.更多还原