Study on Synergistic Mechanism of Water Environment Governance in Dongting Lake Basin Based on Evolutionary Game

Abstract

Watershed water environment governance has always been a research hotspot in the field of transboundary governance. Based on evolutionary game theory, the regional governments of East Dongting Lake, West Dongting Lake and South Dongting Lake were taken as participants to construct a tripartite game model, and the game evolution strategies under unconstrained and constrained conditions were explored respectively, so as to analyze the influencing factors of the construction of synergistic mechanism of water environment governance in Dongting Lake Basin. The results show that: (1) Under the unconstrained condition, the stable strategy of the evolutionary game is “two parties govern, one party does not govern”. However, without intervention of external restraint measures for a long time, the players keep learning and improving according to the game results, and the final synergy mechanism cannot be achieved. (2) Under constraint conditions, the composition of synergistic mechanism mainly depends on the size of ecological compensation and punishment given by the superior government and the duration of constraint by the superior government.