Research on Methods of Ecological Security Assessment of the Middle and Lower Reaches of Liaohe River Based on GIS |
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| Authors: | Wang Geng Nie Baochi Wang Lin Wu Wei |
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| Affiliation: | 1. School of Environmental and Biological Science and Technology, Dalian University of Technology , Dalian , 116024 , China;2. Urban and Environmental School, Liaoning Normal University , Dalian , 116029 , China;3. Shenyang Buraue of Water Resources , Shenyang , 110013 , China;4. School of Environmental and Biological Science and Technology, Dalian University of Technology , Dalian , 116024 , China |
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| Abstract: | Abstract Ecological security assessment and early warning research possess the attributes of spatiality, non-linearity and randomicity, so we must process much spatial information. Spatial analysis and data management are the advantages of GIS, which can define distribution trend and spatial relations of environmental factors, and show ecological security pattern graphically. Spatial differences of ecological security assessment based on GIS are discussed in this paper, of which the middle and lower reaches of the Liaohe River is taken as a study case. First, to work out pressure-state-response (P-S-R) assessment indicators system, and investigate in person and gather information; second, to digitize the watershed; third, to quantize and calculate by the fuzzy method; last, to construct GIS grid database, and expound spatial differences of ecological security by GIS interpolation and assembly analysis. |
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| Keywords: | the middle and lower reaches of the Liaohe River ecological security assessment indicators system GIS spatial differences |
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