Water Resources Planning In The Urban Area Of Changchun City

In order to meet the water demand for water resources in the future urbanization development in the urban area of Changchun city,this article takes“Water Resources Planning Regulations”as a guide to carry out research on water resources planning in the urban area of Changchun city.The paper mainly adopts runoff coefficient method,runoff deep method,recharge method,water quota method,RBF neural network model,and water resources optimization configuration model to carry out plans for water demand forecasting,water supply planning,water saving planning,water resources allocation,and water resources protection planning.The main research results are as follows:(1)Based on the full investigation of the meteorological and hydrological characteristics of the study area,this paper analyzes the evaluation of water resources and the development and utilization of water resources in the study area.In this paper,runoff coefficient method and runoff depth method are used to calculate the amount of surface water resources and the recharge method is used to calculate the amount of groundwater resources.Finally,the total water resources in the study area was 3.81 million m~3.The total amount of water resources available is 3.04 million m~3.The spatial distribution of water resources in the study area is uneven:there are many water resources in the valley,and the water resources in the platform area and the water resources in the mountains are less distributed.The total water resources in the study area are scarce,and the degree of exploitation and utilization of water resources is relatively high,and the exploitation of water resources is relatively small,and the amount of local water resources cannot meet the demand.(2)The water quota method and the RBF neural network model were used to predict water demand in the study area.In 2020 and 2030,the water requirements in the study area were 962 million m~3 and 1259 million m~3,respectively.Based on the current status of water supply,the research area needs to increase the water supply of 203 million m~3 and 500million m~3,respectively,to meet the water demand.(3)According to the existing water supply situation in the study area,plan the water supply in the study area.Construction of a water supply project for the central urban agglomeration to provide water for the research area;expansion of the Changde water purification plant,establishment of a new logistics park water purification plant and an airport water purification plant,which will increase the water supply capacity of the water purification plant in the study area;in the near future(2016-2020y)Expansion of a sewage treatment plant with reclaimed water equipment.In the long-term(2021-2030y),the entire wastewater treatment plant will be reconstructed.They will be equipped with reclaimed water equipment.This will increase the water supply in the study area.After the water supply planning,in 2020y,the research area can add 181 million m~3 of water supply.In 2030,the research area could add 427 million m~3 of water.According to the results of water demand forecast,the water shortages in the study area were 21.705 million m~3(2020y)and 72.958million m~3(2030y),respectively.In the planning year,the water supply in the study area still cannot meet the demand,and the study area needs to consider strengthening water conservation.(4)In order to meet the water demand in the study area,a water-saving plan was formulated by analyzing the current water-saving potential of the study area.The research area mainly carries out water conservation in life,agriculture and industry:life-saving water mainly aims at the transformation of water supply pipe network and the popularization of water-saving equipment;the water-saving irrigation project is mainly popularized for agricultural water-saving,and advanced water-saving technology is promoted;industrial water-saving focus on the promotion of advanced industrial processes,the popularization of water-saving equipment,and increasing of the reuse of industrial water.After the water-saving plan,in 2020,the research area will save 50.10 million m~3 of water.In 2030,the study area could save 78.91 million m~3 of water.According to the results of the water supply plan,the remaining water volume in the study area was 28.395 million m~3(2020y)and 5.952million m~3(2030y),respectively.In the planning year,water supply in research area can meet water demand.(5)Formulate water resources allocation plans based on the water requirements of each administrative region.This can provide a basis for the rational use of water resources in various administrative regions.This article presents five water allocation options for the study area.Plan 1:On the basis of strengthening water conservation in the entire region,the water resources allocation plan is formulated by analyzing the water demand of each district,analyzing the water demand of each district;On the basis of the amount of water provided by the water supply plan,the economic,social,ecological,and integrated benefits are to be optimized.An optimal allocation model of water resources will be constructed to formulate a water resources allocation plan 2,3,4,and 5.After comparing and analyzing each plan,the best plan was selected.When all administrative districts achieve the water saving goal,Plan 1 is the best option,and it has the least amount of water and can meet the water demand of each district;When the water saving plans of various administrative regions cannot be completed according to the objectives,Plan 5 is a more feasible solution.(6)In order to provide quality water resources for the study area,the water resources protection project in the research area is planned.It mainly includes the protection of surface water resources,the ecological protection for rivers and lakes and protection of groundwater resources.It focuses on the protection of Shitoukoumen Reservoir and Xinlicheng Reservoir,as well as the planning and construction of pollution control projects,water body compliance and control projects,river-lake connectivity projects,and constructed wetland projects,and measures to prevent groundwater resources pollution.