Study On The Interval Optimization Model Of Momoge Wetland Replenishment Scheme Under The Constraint Of Ecological Benefit

Momoge National Nature Reserve is China's important inland wetlands,water ecosystems and rare wetland birds nature reserves,is an important ecological pillar of Zhenlai County.However,since the 1970s,with the changes in climate conditions and human activities intensified,Momoge Nature Reserve ecosystem has been destroyed.As of 2012,Momoge Nature Reserve wetland area has been reduced by more than half,the groundwater level continues to decline,ecosystem function degradation,the ecological environment is very fragile.In 2013,Jilin Province Water Resources Department to start the implementation of the"rivers and lakes connected project",including the Momoge Nature Reserve,including the western region of Jilin Lake bubble water supply,improve the local ecological environment.The excessive amount of water diversion will have an impact on the ecological system and the hydrological situation of the river,at the same time can also cause waste of water resources.In order to reduce the impact of the water diversion project on the environment,avoid wasting resources,making scientific and reasonable water diversion scheme is the key problem of water diversion project.Based on this,this paper is based on"Jilin western water supply project",based on comparative analysis of several optimization methods,in view of the uncertainty of parameters and variables in the study area,combined with the hydrological and ecological characteristics of the study area,according to the parameter and variable value range,using the interval planning method under the condition of uncertainty,firstly,the ecological water demand of wetland suitable for mo mog nature reserve is calculated.Secondly,combining water conservation benefit,ecological benefit and economic benefit,according to the engineering design scheme and regional environmental characteristics,building the ecosystem service value index system suitable for the Momoge National Nature Reserve,calculate the ecosystem service value of the water diversion project.And then,according to the actual circumstances of the Momoge National Nature Reserve and contact the engineering practice,considering ecological benefit,aiming at reducing diverted,using interval planning method,based on the interval optimization model based on uncertainty,resulting in the least amount of water diversion optimization program.After calculation,the optimization scheme obtained in this paper is compared with the project planning scheme,total water diversion reduced 300~2220×10~4m~3,The decrease of total water diversion was between[3.69%,27.32%],reached the purpose of reducing water diversion under the condition of ensuring ecological benefits.From the results of the optimization program,the decrease of total water diversion mainly refers to the reduction of flood volume,and the normal amount of water diversion reduces very little.Therefore,in order to improve the transit water utilization rate,make full use of flood resources,according to the result of optimization model,finally,this paper re-optimization based on the optimization program.The lower limit result of the re-optimization scheme is compared with the lower limit result of the first optimization scheme.the amount of flood water has increased by 3.14 times.Re-optimization program to improve the utilization of water transit,to achieve the full use of flood resources,reducing the Mormons National Nature Reserve and the hydrological situation downstream of the river and the ecological environment,optimizing the project's diversion schedule,Which provides effective data support and scientific theoretical basis for decision-makers,and makes an important exploration on the practical application of engineering theory of river-lake connectivity.