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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...
Census operations are very important events in the history of a nation. These operations cover every bit of land and property of the country and its citizens. The publication of census based on spatial units is one of the important problems of national statistical organizations, which requires determination of small statistical areas (SSAs) or so called census geography. Since 2006, Turkey aims to...
Alien plant invasion has become one of the most devascating disturbances threatening economy, environment, resources, human health, food safety, and energy. Natural factors (e.g., climate, vegetation, geomorphology) and social conditions (e.g. tourism, transportation, human population, industrial output) make the problem of alien plant invasion more complicated in number, frequency and the expansion...
Land use is the mirror of the society, there is corresponding relation between land use structure and social-economic structure in the certain period. The paper applied principal component analysis (PCA) and technique for order preference by similarity to ideal solution (TOPSIS) method to evaluate the coordination between land use and regional development. Firstly, the index system of coordination...
The regional eco-environment quality is the base of the sustainable development. This paper developed an eco-environmental vulnerability evaluation model using spatial principle component analysis (SPCA) and eco-environment vulnerability index method. This method was carried out in a case study of Hubei Province, China. The vulnerability was classified into six levels: potential, slight, light, medial,...
The research on assessing the eco-environment vulnerability contributes to ecological environmental conservation and development. Taking Jiangxi Province as a case study, this research has developed the index system of eco-vulnerability from the perspective of the meaning and the cause of eco-vulnerability and in accordance with the eco-environment situation of Jiangxi Province. The indicators were...
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...
With the original data as basis, evaluation of cultivated land quality was carried out in Yidu County with the aid of GIS and the fuzzy matter-element proximity cluster model. The procedure of the evaluation goes:(1)Use the principal component analysis method to determine factors which affecting cultivated land quality;(2) extract correlatographs through vectorization with the aid of ArcGIS, put them...
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