Study On Water Resources Allocation In Zhengzhou Metropolitan Area Based On Secondary Distribution

As the provincial capital of Henan Province,Zhengzhou is the high concentration area of population and production.With the accelerated construction of Zhengzhou metropolitan area,the demand of water will continue to grow which leads to increasingly intensified supply and demand.Based on the water resources of Zhengzhou city which is taken as the research object,according to the characteristics of city water supply process,water plant was chosen as a key node of the introduction of water resources allocation category,two levels of water resources allocation model was established which basically realizes the actual water supply configuration of the water resources in the whole process and provides theoretical support for the reasonable planning and layout of water and water plant in Zhengzhou metropolitan area.The main contents and research results are as follows:(1)From the perspective of the system,the structure and function of water supply system and urban water supply system were analyzed,the relationship between the two was explored.The network of hydraulic connection between water sources and users,water sources and water plants was drawn in Zhengzhou.On this basis,the two-level water resources allocation framework of Zhengzhou urban area was constructed considering these factors.(2)According to the actual situation of water supply and utilization in Zhengzhou,the water supply and water users were classified.From the perspective of water supply,the available water supply was analyzed in the planning year,and the water demand of Zhengzhou in the planning year was predicted by using the quota method.The above results provide the basic data for the water resources allocation of Zhengzhou metropolitan area.(3)The optimal allocation model of macro water resources in Zhengzhou was successfully constructed.The objective function included three aspects,which were the social benefits,economic benefits and ecological benefits.To solve the objective function,the structural evaluation function method was used which transformed the multi-objective into a single target.Aiming at the balance of supply and demand,the allocation scheme was set up by adopting the idea of gradually increasing control measures,and the water shortage degree of each water user in each district is analyzed,which is the basis for increasing control measures.The results show that,water shortage in Zhengzhou City has a greater degree of alleviation after increasing the water supply project of Zhaokou Irrigation District,water lifting works of Niukouyu and water supply expansion project of Mangshan Irrigation Pumping Station on the basis of the basic scheme.(4)Based on the optimal allocation of water resources in Zhengzhou city,in order to analyze the distribution and scale of water,The target of water consumption of urban water users is analyzed,constructs the multi resources and water resources in Zhengzhou urban area two distribution model,the metropolitan area with two distribution configuration of water users.The secondary water resources allocation model of multi-water and multi was constructed waterworks in Zhengzhou metropolitan area,which achieves the secondary allocation of water allocation for urban households.The results show that the water and waterworks layout in the main city area,the Eastern New City,the Western New City and Xinzheng Group are basic reasonable,and is basically able to meet the regional water demand.Other partitions exist different degrees of problems,such as the size of waterworks is too small in Aviation City,Southern New City and Xinmi Group,and water supply source is single in Southern New City and Dengfeng Group.