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GIS-based Integrated Assessment of Environment Vulnerability in Yangtze River Delta China

Author: XuQingYong
Tutor: TongXiaoJuan；HuangMei
School: Beijing Forestry University
Course: Ecology
Keywords: Environment Vulnerability Geographic Information Systems Yangtze River Delta
CLC: X820.2
Type: Master's thesis
Year: 2011
Downloads: 106
Quote: 0
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Abstract


The environment is the material basis of human survival and development. But in recent years, a series of environmental problems such as soil erosion, drought, floods, and reduced biodiversity sustained environment for human survival increasingly fragile trend showing. The Yangtze River Delta as a remarkable rapid economic development region in the context of global climate change, along with the process of industrialization and urbanization, the environment of the region showing the characteristics of vulnerability, has become China's new environmentally fragile zone. Select Evaluation Based on environmental issues in the Yangtze River Delta and the vulnerability characteristics from the two lead to environmental vulnerability of natural and human factors, principal component analysis of the use of space to build the evaluation index system, using AHP to determine the index weight in geography information system software support, a comprehensive evaluation of the environmental vulnerability of the Yangtze River Delta, and the causes of the vulnerability analysis. The results showed that the extreme and severe fragile areas of the Yangtze River Delta environment are mainly distributed in which the Ministry of Taihu Lake Basin and Zhejiang Midwest, accounting for 20.10% of the entire study area; mild and moderate vulnerability zone throughout the entire study area, accounting for 55.25%; micro The degree of vulnerability is mainly distributed in the northern part of Jiangsu and Zhejiang in eastern, accounting for 24.65%. Overall, most of the area of ??the environment of the Yangtze River Delta are vulnerable to mild and moderate. Influencing the environment of the Yangtze River Delta, the vulnerability of natural factors indicators have ≥ 35 ° C days, droughts and distribution Altitude: human factors indicators per capita arable land, water resources per capita, the wastewater emissions per capita, per capita waste gas emissions. The vulnerability classification using geographic information system software support natural breakpoint law environmental vulnerability index Ascending divided into five categories, respectively, on behalf of the slight, mild, moderate, severe and extreme fragility 5 Level of vulnerability . The main features of the fragile area of ??extreme and severe environment is frequency, lack of resources, pollution intensity, serious soil erosion and biodiversity of natural disasters. In order to promote the region's balanced development, environmental vulnerability comprehensive evaluation of the results and the vulnerability zoning, and vulnerability characteristics mentioning the region to improve the environment of the recommendations, in order to provide a theoretical basis for local protection and building environment for the comprehensive management and recovery fragile environment to provide a basis for decision making.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > General issues > Comprehensive evaluation of the quality of the environment
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