Journal
ECOLOGICAL MODELLING
Volume 368, Issue -, Pages 180-190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecolmodel.2017.11.019
Keywords
Constructed wetland; Ecosystem protection; FRS-based NSAA; Fuzzy random variable; Optimization model
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Funding
- National Natural Science Foundation of China [70831005]
- Research Foundation of Ministry of Education [20130181110063]
- Social Science Foundation of Anhui Province [AHSKY2017D83]
- Quality Engineering Project of Hefei University [2017jyxm016]
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The two major aims of watershed management are regional economic development and watershed ecosystem protection. In this paper, constructed wetland (CW) technology is employed to examine watershed ecosystem protection under a certain regional economic load. The Chaohu Lake watershed in China was chosen as the target study area and fuzzy random variables used to describe the uncertainties. Then, a bi-level optimization model for watershed-scale CW planning was developed and applied to the Chaohu Lake watershed with the aim of protecting ecosystem health. To solve the model, a fuzzy random simulation-based nested simulated annealing algorithm was designed. The results showed that there was a finite sum game relationship between economic development and ecosystem health within the Chaohu Lake watershed. Under a probability and possibility of 0.9, to achieve the ecological goal F-1 = 70, it was estimated that a 348.19 (ha) ON needed to be constructed. The impacts of environmental policies and economic development on the watershed ecosystem were found to be significant. One of the key practical results indicated that: in the Chaohu Lake watershed, the water environmental treatment of rivers should take precedence over that of lakes; a result which could be of assistance to local government policy making. (C) 2017 Elsevier B.V. All rights reserved.
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