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Focus on major eco-environment problems in Dongjiangyuan area, the paper selected twelve evaluation indexes (including terrain, climate, soil, vegetation index, land use type, socio-economic data) were set up based on RS and GIS technology. Using 100 m×100 m real area as basic unit, the spatial principal components analysis method is apply to calculate the eco-environment synthesis exponent according...
The purpose of this paper is to develop a framework of ecological vulnerability assessment, and to assess the ecological vulnerability by this framework in the middle and lower reaches of the Hanjiang River Basin. Based on the theory of cause - and - consequence, we proposed an indicator system of ecological vulnerability assessment at basin scale. Twelve indicators are selected to constitute the...
Soil erosion seriously threatens the ecological environment across the world, and much attention has also been devoted to this problem in recent years. The objective of this study was to assess soil erosion sensitivity under its environment background on large scale. Supported with GIS and remote sensing technologies, the relationship of soil erosion intensity status and its environment background...
The eco-environmental regionalization is a comprehensive division process based on the geographical differences of regional eco-environment status. Compared to the traditional method, spatial analysis is more and more used to get the main characteristic of the eco-environment before regionalization. In this paper, TM, SPOT and QuickBird images of 2000-2008 are taken as data sources. And using Remote...
Land use/cover change is an important issue for global environmental research. Combined with the use of GIS, this paper explores the utilities of CBERS images to analyze the land use/cover changes in the city of Lianyungang, and analyzes the driving forces by the principal component analysis. Results show that during the past 8 years, the local land use pattern has changed greatly, especially for...
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