| China's water resources per capita is low,and regional distribution is uneven.The shortage of water resources in the northern region is particularly serious,and it has become one of the main factors restricting the sustainable development of the economy and society.The same problem exists in Henan Province,one of the northern provinces.In order to solve the problem of water shortage,the Party Central Committee and the State Council timely proposed the most stringent water resources management system,implemented the water rights trading system,and tried to promote regional water conservation through water rights trading and resolve regional water use conflicts.At present,there are relatively few large-scale water rights transactions in the cross-regional cross-basin with administrative districts.In this context,the research on cross-regional water rights trading model is carried out,which can be used for reference in the development of water rights trading in China.This paper selects the water receiving area of the South-to-North Water Diversion Project of Henan Province and the water abstraction area along the Yellow River as the research area.The water main channel of the South-to-North Water Diversion Middle Route and the Yellow River mainstream flow channel can be used as water transport channels for water rights trading,and there are different areas where water rights cannot be freely The characteristics of the transaction,therefore,the multi-objective optimization model of water rights trading based on the“single-double water source mutual feeding mechanism”of the South-to-North Water Transfer and the Yellow River water source was constructed,And carry out research in the study area's water use examples in 2015,Finally,for the water source upstream water risk of water rights trading,the water rights trading plan in the typical situation is formulated.The actual needs to solve the regional water use contradiction in Henan Province.The main research contents are as follows:1.A set of methods for evaluating the potential of water rights trading after efficient water saving is proposed.The method includes the water quantity allocation by the water user and the water demand calculation method after the water saving,and the water saving amount of the water user is calculated by calculating the available water quantity of the water user and the water demand after the water saving,and then calculating the water rights trading potential of each city.According to the accounting results,the total annual water rights trading potential of the 16cities in the study area is-66 million m~3,of which 1.33 billion m~3 is available for sale and 1.396 billion m~3 is required for water purchase.2.Aiming at the characteristics of the water source of the South-to-North Water Transfer Project and the Yellow River water source in the Research Area of Henan Province,a multi-objective optimization model for water rights trading based on the“single-double water source mutual feedback mechanism”was developed.The model takes the economic benefit and the ecological benefit as the objective function.After the single water source water rights transaction,the model conducts the dual water source water rights trading to realize the water mutual feedback of the single water source city and the dual water source city.The improved genetic algorithm NSGA-II algorithm was used to generate scheme set.(The NSGA-II algorithm is a non-dominated sorting genetic algorithm,which is an improvement of the traditional genetic algorithm)and adopting The Young Conflict Resolution Theory(hereinafter referred to as YCRT)The method optimizes the set of programs to arrive at the best deal.The transaction results show that under the current average water supply of the South-to-North Water Transfer Project and the Yellow River water source,the model can achieve considerable economic and ecological benefits under the current accounting level of 2015,Among them,the economic benefit increased by 5.17%,and Sewage treatment costs representing ecological benefits decreased by 2.17%3.Combining the water data of the South-North Water Transfer Project and the Yellow River water source in the study area for many years,the supply and demand gaps in the study areas of the two major water sources in the wet year,the normal year of the water and the dry year were calculated,and Then select two typical encounter scenarios:the pingku-type(the Yellow River normal water year,the South-to-North Water Transfer Progect water source dry year)and the Kufeng-type(the Yellow River dry year,the South-to-North Water Transfer Progect water source wet year),calculate the tradable water rights of each city,Finally,using the established water rights trading model,the water rights trading risk plan under the typical wet and dry encounter scenarios of the two major water sources is formulated. |
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