Assessing Coupling Coordination Degree of Protection and Utilization of Waterfront Resources Along Cascade Reservoirs in the Upper Yangtze River——Take the Three Gorges Reservoir as an Example
The operation of large cascade reservoirs in the upper Yangtze River has significantly improved the capacities of flood controlling,power generation and shipping of the Yangtze River,which in turn,promoted the regional socio-economic development.This is specially the case for the Three Gorges Reservoir(TGR).The TGR is one of the strategic reserves of freshwater resources in China.Protection and utiliza-tion of its waterfront resources in a scientific and effective way are of great significance for ecological environment protection and social eco-nomic development around reservoir areas.However,too little attention has been paid to coupling coordination of protection and utilization of waterfront resources along large reservoirs in the upper Yangtze River.Therefore,taking the TGR as an example,firstly,an array of assess-ment indexes has been carefully established for assessing the protection and utilization of the waterfront resources in the TGR.It consists of eight indicators which can be quantitatively evaluated.Secondly,with the help of remote sensing images and field sampling data of 34 sec-tions in the TGR,a coupling coordination degree model is applied to the assessment indexes for assessing the coupling coordination of protec-tion and utilization in the TGR.The results show that:① The shoreline utilization level and comprehensive level of the TGR show a decreas-ing trend from the upstream to the downstream of the reservoir,and the average shoreline protection level is 0.523,which is much higher than the shoreline utilization and comprehensive level.② The coupling coordination degree of the protection and utilization of the waterfront is mainly distributed in the range of 0.161～0.879,and 44%of the shoreline is located in the running-in development area,and the coordina-tion development level is at a primary level.③ The coupling coordination degree shows a"high in west and low in the east"distribution pattern,indicating that there is a certain linkage with the level of social and economic development.Therefore,we suggest that waterfront protection should be focused on in the future,as well as the waterfront utilization efficiency.The results are expected to provide a reference for the coordinated development of protection and utilization of waterfront resources in the TGR and to help the sustainable operation of the upper Yangtze River cascading reservoirs.
Three Gorges Reservoirhydro-fluctuation zonewaterfront protectionwaterfront utilizationcoupling coordination degree
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