Research On Water Resources Carrying Capacity Of Taiyuan City

In recent years,the water resources situation in Taiyuan City has been improved to a certain extent,but with the development of social economy,there is still a lot of room for improvement in the carrying capacity of water resources in Taiyuan City.Carrying out the research on the carrying capacity of water resources in Taiyuan City can provide targeted suggestions for the management of water resources in Taiyuan City.This paper takes Taiyuan City,which has serious water shortages in the North China Plain as the research area,and takes 2011 to 2019 as the research time.Based on the original DPSIR(driving force-pressure-state-impact-response)model,M(management)is introduced.The subsystem builds the DPSIRM model.According to the connotation of each subsystem,combined with the current situation of water resources in Taiyuan City,15 evaluation indicators are selected to construct the evaluation system of water resources carrying capacity in Taiyuan City.The entropy weight method in the objective confirmation method is used to determine Taiyuan City There are 15 index weights of water resources carrying capacity.Based on the calculation of entropy weight method,the TOPSIS method strengthens the full use of the normative matrix,evaluates the water resources carrying capacity of Taiyuan City from 2011 to 2019,and proposes Taiyuan water resources Carrying capacity allocation proposal.The study found:(1)Analyze the relationship and meaning of each subsystem in the DPSIRM model.According to the principles of representativeness,rationality,quantification,and dynamics,combined with the general situation of the research area and the meaning of each subsystem,15 indicators are used to construct Taiyuan Water Resource carrying capacity index system.Each index is graded according to five grades of I(severe overload),II(overload),III(critical overload),IV(weak load),and V(bearable),and the classification thresholds are determined,and the four classification thresholds are regarded as four The calculation of the water resources carrying capacity is added to the virtual year,and the critical value of the closeness of the water resources carrying capacity of Taiyuan is obtained.(2)From 2011 to 2019,the overall water resources carrying capacity of Taiyuan showed an upward trend,which was mainly divided into two stages.The first stage was from 2011 to 2015,the stable development stage.The closeness value was divided into overload and critical overload.fluctuates near the boundary.At this stage,the state S subsystem shows a downward trend,and the rest of the subsystems show a stable trend.The second stage is from 2016 to 2019,the rapid development stage of Taiyuan's water resources carrying capacity.The rapid development of this stage from 2015 to 2016 is mainly because 2016 is a wet year,and the water volume is relatively abundant.The closeness of the S subsystem The value rises linearly.The main reason for the rapid development of water resources carrying capacity from 2016 to 2018 is the substantial improvement of the management M subsystem.The reason for the increase in water resources carrying capacity from 2018 to 2019 is mainly due to the improvement of the response R subsystem.(3)From 2011 to 2012,the most important obstacle factor for water resources carrying in Taiyuan City was the forest coverage.From 2016 to 2019,the top three obstacle factors in the ranking for four consecutive years are the three indicators of population density,urban per capita domestic water and groundwater exploitation coefficient.The three indicators of population density,urban per capita domestic water and groundwater exploitation coefficient will be the main obstacles in the future.The two indicators of urban per capita domestic water and groundwater exploitation coefficient have great potential for improvement.