The Research On Responsibility Definition Of Ecological Compensation In Watershed

Ecological compensation mechanism of watershed is recognized as an effective way to resolve economic development and environmental protection problems of districts in the watershed.However,the determination of criteria for watershed ecological compensation is very complicated and not yet well-solved.Currently,the determination of criteria for watershed ecological compensation based on the evaluating indicator of water quality and quantity is relatively acceptable,however, one crucial problem in this determination of criteria is that the definition of responsibility among districts of the watershed is not well-established.The definition of responsibility is a relatively complicated problem,which can be categorized into responsibility definition of water quality and definition of water quantity.Currently, keeping surface water quality to surface water quality criteria typeâ…¢is widely regarded as the environmental responsibility of each district of watershed,and water quantity responsibility is that if downstream has enough water quantity for supporting their basic life water demand and ecological water use demand,upstream districts provide no water quantity to downstream districts,otherwise,upstream should satisfy downstream districts' basic life water demand and ecological water use demand. These two definitions are used as baseline of ecological compensation.However, these kinds of definitions are enforced by the government for the sake of convenient implementation,which do not consider the principle of fairness,efficiency and sustainable development.Therefore,these definitions will hinder the effective implementation of watershed ecological compensation.Considering the principle of fairness,efficiency and sustainable development,this dissertation thus establishes the definition models of water quality and water quantity responsibility.In the theories of transferable discharge permit and transferable water right,these responsibility definitions can be deemed as the initial allocations of emission permit and water right respectively.Therefore,based on the rich fruitions of researches of transferable emission permit and water right,we employ the method of environmental Gini coefficient and establish non-linear programming model to allocate the emission permit of each district,while adopting AHP(Analytic Hierarchy Process) method for the allocation of water right.Water supply in Huaihe watershed is less than the water demand,and this gap becomes larger and larger recently,Water resource in Huaihe watershed has been overexploited,Also,Huaihe river pollution is very serious.In the past few years,the length of river stretch which is measured as surface water quality criteria type V or above V has already accounts for 65%of total evaluated river length;and in this watershed,the dispute of transboundary water pollution happened frequently also. Therefore,in an effort to encourage water resource saving and emission abatement,it is essential to build a well-established ecological compensation mechanism in Huaihe watershed.Therefore,we apply our definition models to Huaihe watershed in the last chapter,and analyze the allocation results.The results show that our definition method of environmental responsibility of watershed is fairer and more efficient than the status quo one.