title: Assessment of water ecological carrying capacity under the two policies in Tieling City on the basis of the integrated system dynamics model.
abstract: Considering the limitation of the traditional method to assess the ecological carrying capacity and the complexity of the water ecological system, we used system dynamics, ANN, and CA-Markov to model a water ecological system. The social component was modeled according to Granger causality test by system dynamics. The natural component consists of the water resource and water environmental capacity, which were forecasted through the prediction of precipitation and change in land use cover. The interaction of the social component and the natural component mainly reflected environmental policies, such as the imposition of an environmental fee and environmental tax based on their values. Simulation results showed the different assessments on water ecological carrying capacity under the two policies. The population grew (2.9 million), and less pollution (86,632.37 t COD and 2854.5 t NH4N) was observed with the imposition of environmental tax compared with the imposition of an environmental fee (2.85 million population, 10,8381 t COD and 3543 t NH4N) at the same GDP level of 585 billion CNY in 2030. According to the causality loop, we discussed the different states under the policies and the reasons that caused the differences in water ecological carrying capacity state. According to game theory, we explained the limitation of the environmental fee policy on the basis of marginal benefit and cost. The externality was cleared up by the environmental tax policy.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (China Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
authors.forename: Shuo
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (China Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China.
authors.forename: Ling
authors.initials: L
authors.lastname: Xu
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering (China Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China. Electronic address: yfl6666@yeah.net.
authors.forename: Fenglin
authors.initials: F
authors.lastname: Yang
authors.affiliation: Liaoning Province Key Laboratory of Basin Pollution Control, Liaoning Academy of Environmental Sciences, Shenyang 110031, PR China.
authors.forename: He
authors.initials: H
authors.lastname: Wang
mesh_terms: D002947:Cities; D003247:Conservation of Natural Resources / Q000379:methods; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D058735:Environmental Policy; D008962:Models, Theoretical; D062066:Water Resources; D014881:Water Supply
keywords: Carrying capacity; Environmental tax; LULC; System dynamics; Tieling City; Water resource