Eco-environmental evaluation of regions along middle route of South-to-North Water Transfer Project based on PSR model
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Abstract:
Based on the ecological index and the modified press-state-response model, approaching from the two perspectives of environmental quality and ecological security, this paper has successfully constructed a synthetic evaluation index system which can be used to evaluate the eco-environmental situation in regions along the main canal of the Middle Route Project for South-to-North Water Transfer after respectively considering the natural influence and the combined influence of nature, economy, and society. The results indicated that according to the assessment of environmental quality during the entire evaluation period, only Lushan County was "good" and Anyang City was “relatively poor” while all the other regions were “average”. Besides, according to the ecological security assessment, Xichuan County was the only one in a relatively secure state while 97.54 percent of the study area were in an early or moderate warning state, with the moderate-warning regions accounting for 16.28%. Generally speaking, the eco-environmental quality of the study area in 2004 was merely average, and the ecological security situation was worrying; therefore, the government should improve supervision to limit human activities in the study area.
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