Pedosphere 15(4): 456--464, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Integrated evaluation of ecological security at different scales using remote sensing: A case study of Zhongxian County, the Three Gorges area, China
ZUO Wei1,2, ZHOU Hui-Zhen2, ZHU Xiao-Hua3, WANG Qiao4, WANG Wen-Jie4 and WU Xiu-Qin5
1 SinoMaps Press, Beijing 100054 (China). E-mail: zuowei@sinomaps.com
2 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)
3 Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101 (China)
4 China National Environmental Information Center, Beijing 100029 (China)
5 Department of Resource and Environmental Geo-Sciences, Beijing University, Beijing 100871 (China)
ABSTRACT
      Based on related literature and this research, an ecological security evaluation from the pixel scale to the small watershed or county scale was presented using remote sensing data and related models. With the driver-pressure, state and exposure to pollution-response (DPSER) model as a basis, a conceptual framework of regional ecological evaluation and an index system were established. The extraction and standardization of evaluation indices were carried out with GIS techniques, an information extraction model and a data standardization model. The conversion of regional ecological security results from the pixel scale to a small watershed or county scale was obtained with an evaluation model and a scaling model. Two conceptual scale conversion models of regional ecological security from the pixel scale to the county scale were proposed: 1) scale conversion of ecological security regime results from pixel to small watershed; and 2) scale conversion from pixel to county. These research results could provide useful ideas for regional ecological security evaluation as well as ecological and environmental management.
Key Words:  ecological security, integrated evaluation, models, remote sensing, scaling
Citation: Zuo, W., Zhou, H. Z., Zhu, X. H., Wang, Q., Wang, W. J. and Wu, X. Q. 2005. Integrated evaluation of ecological security at different scales using remote sensing: A case study of Zhongxian County, the Three Gorges area, China. Pedosphere. 15(4): 456-464.
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