Research On The Value Dispatching Of Reservoir Ecological Services Based On The Improved Firefly Algorithm

With the rapid development of social urbanization,human activities have threatened the normal operation of natural rivers,resulting in the destruction of ecosystems in the river basin,which in turn affects the normal functioning of ecological services.The sustainable development of river health will be impossible.The quantification of ecological service function value is a hot topic in current ecological economics and socioeconomic research.The realization of river ecological service value is also a positive evaluation of river health.Therefore,in the context of the increasingly prominent river ecological health issues,it is very important to correctly and rationally evaluate the value of its ecosystem services.Based on the functions of river reservoirs,this paper classifies the functions that are beneficial to humans,establishes a reservoir ecological service value and emergy evaluation system,uses an improved firefly algorithm to solve the mathematical model of reservoir ecological scheduling,and calculates various service functions value and emergy,and finally,by analyzing the total statistics,the sensitivity of ecological flow influencing factors,the weight of each service function value,and the correlation between the degree of ecological change and the value of ecological services,to determine the trend of value changes.The main research contents and results of this article are as follows:(1)On the basis of summarizing the ecological service functions of rivers,establish a classification system based on the five major service values of freshwater supply,material production,ecological support,ecological regulation,culture,education and entertainment;(2)Adopt the basic ideas of value analysis method and emergy analysis method,combined with the classification of river ecological service function value,establish a basic framework of service function value analysis and emergy analysis,and provide analysis ideas for river ecological value and emergy calculation;(3)The firefly algorithm in the bionics intelligent algorithm is introduced,and the algorithm is appropriately improved to solve the mathematical model of reservoir ecological scheduling.In contrast,the improved firefly algorithm has better global search capabilities,and to a large extent,avoids the shortcomings of firefly individuals falling into local optimality,and improves the efficiency and correctness of the algorithm;(4)This article takes Xinfengjiang Reservoir as an example to analyze and apply the value and emergy assessment methods.The results show that: first of all,from the perspective of the total ecological value of the reservoir,with the decrease of the regulation flow in different typical years,the total value of the service function and the total value of the energy show a downward trend overall;from the perspective of ecological and economic benefits,The result of the two evaluation methods is that the proportion of ecological benefits is too large,and the result of emergy evaluation is even more so.Furthermore,through the calculation of the sensitivity of ecological flow factors and the weight of each service function,and through the analysis of objective and subjective coupling methods,it was found that the value of flood storage function,storage water resource function,socio-economic water supply function value and biodiversity protection.The sensitivity of sexual function value is strong,that is,it is greatly affected by the proportion of ecological flow leakage,and these services have the largest weight,which has a greater impact on the total value.In addition,when the ecological flow is 70% to 75% of the regulated flow,it is a reasonable percentage of ecological flow leakage.Finally,by analyzing the correlation between the degree of ecological change and the value of ecological services,it is found that when the degree of ecological change increases,the corresponding value of ecological services or energy value tends to decrease,and there is an obvious competitive relationship during the dry season.