Research On Joint Dispatch Of Reservoir Ecological And Economic Value Based On Emergy Analysis Method

The construction of reservoir has brought great economic and social benefits for human beings.but with the time goes by,the negative impact on the ecology system has gradually emerged.In order to reduce the impact of reservoir on the reservoir ecosystem,the research on reservoir ecological operation by incorporating ecological factors into the reservoir operation model is one of the most valuable research directions at present.However,there is a problem of single ecological goal in reservoir ecological operation,and less studies on the comprehensive benefits of the ecological and social economy of the reservoir.So the unified quantitative research on the ecological and social economic benefits of the reservoir needs to be further deepened.Based on it,emergy analysis method will be introduced into reservoir ecological operation in this paper.From the ecological,social and economic value of the river,Longkaikou,Ludila and Guanyinyan reservoirs in the middle reaches of Jinsha River are taken as the research objects,and PGSA is used to study reservoir ecological and economic value operation.The research contents and achievements of this paper are as follows:(1)In this paper,the coupling method of SPA and projection pursuit is used to classify the runoff.The characteristics and specific steps of this method are introduced in detail.Compared with the conventional mean standard deviation method,the advantages of set pair analysis projection pursuit coupling method are obtained,and on this basis,the typical years are divided.(2)The value of water resources is classified by introducing the previous research results.The definition of water resources value is introduced in detail.At the same time,combining with energy value analysis,the evaluation model of ecological and economic value of water resources is constructed,and appropriate evaluation methods are selected for each water resource value.(3)In this paper,the simulated plant growth algorithm is combined with the successive optimization method,and then the improved simulated plant growth algorithm is used to solve the emergy joint operation model of ecological economic value of reservoir group,and the results are compared with those of genetic algorithm.The results show that the calculation results of the improved PGSA in typical rainy year are 0.11% higher than that of genetic algorithm,for typical year by 0.30% and for dry year by 0.01%.The results show that the improved simulated plant growth algorithm is an effective method to solve the joint operation problem of reservoirs.(4)Taking Longkaikou,Ludila and Guanyinyan reservoirs in the middle reaches of Jinsha River as the research objects,the water resource values of the reservoirs are evaluated through the joint operation model of the reservoirs,and the optimal total energy value of the ecological value of the reservoirs is obtained.The results show that joint operation can significantly improve the ecological and economic value of the entire cascade reservoir,of which the ecological value is the most obvious.