Abstract:

Nowadays water resource is relatively lacking in China and water pollution becomes serious gradually，though economic progress has been made by the past thirty years.Thus， it is the time to solve these problems for a wonderful tomorrow.The basin integrity and the administrative separation have made it possible that water pollution shifts from the upstream administrative region to the downstream administrative region.As a result of that,transboundary water pollution conflicts in basin may appear.In China,traditional extensive economic patterns often don’t take care of environment.Transboundary water pollution conflicts usually occur between different regions in basin.The graph model for conflict resolution is a method of conflict analysis on the basis of noncooperative game theory.The method analyzes the behaviors of the players involved certain conflicts at the strategic level,so that the equilibrium or resolution of the conflict can be achieved by the graph model.The graph model analysis process considers the decision participants,their decision options,and their relative preferences on the feasible states when modeling and analyzing the conflict.All feasible states and states transitions including unilateral improvements for every player must be picked out before stability analysis.Then assessing the stability of every state for every decisionmaker under various stability definitions is necessary so that the potential equilibrium states can be achieved.There are five usual stability concepts in the graph model:Nash stability,General metarationality,Symmetric metarationality,Sequential stability and Limited move stability.Different stability concepts are based on different hypothesis.In this study,the graph model for conflict resolution was applied to the transboundary water pollution conflict in the Taihu Lake Basin as a case,and an actual example of water pollution conflict between Jiangsu Province and Zhejiang Province and another example in Jiangsu province were picked up to prove the effect of the graph model for conflict resolution in analyzing the transboundary water pollution conflict.Firstly,players and their options should be identified from the conflict.Then their relative preference on the feasible states could be gained.Lastly,stability analysis was carried out.After the analysis,the potential equilibrium states of the conflict were worked out.The results showed that there was not only one potential equilibrium state.One was actual existing state before the given time.The other equilibrium state was such a condition in which the central government carried out incentive strategies and control strategies at the same time and Jiangsu Province adopted the strategy that pollution emission was partially reduced and Zhejiang Province resorted to communication and coordination strategy.The similar result could be gained in the transboundary water pollution conflict between Hangzhou and Shaoxing.With the help of case study,some further discussion on the graph model for conflict resolution was carried out.Generally speaking, the graph model for conflict resolution is an easyto use and flexible method to study strategic conflict,because the method need not so much information when modeling and analyzing conflicts.It turns out that the graph model for conflict resolution works efficiently on the transbounday water pollution conflicts.〖