Methodology And Validation Of Water Ecological Environment Carrying Capacity Monitoring Based On The Control Unit

The problem of water ecological environment in watershed is one of the important factors restricting the development of regional economy.With the rapid development of China’s economy,the research on the carrying capacity of water ecological environment in watershed has gradually become an important basis for planning regional industrial structure and balancing the distribution of resources.The traditional water ecological environment carrying capacity assessment technology focuses on the overall assessment of watershed carrying capacity,thus neglecting the functional differences of control units.Based on the improvement of water ecological environment in Liaohe River basin and the construction of complex water environment management system,this paper constructs the method of dividing control unit type based on functional characteristics and the monitoring index of water ecological environment carrying capacity with functional difference system,and select the control unit with significant pollution characteristics in Liaohe River Basin to carry out verification research.Based on the evaluation results of water ecological environment carrying capacity of Liaohe River system,the paper explores the optimization method of monitoring section and index monitoring frequency.To improve the current water ecological assessment monitoring program to provide theoretical and technical support.Based on the location theory,the control unit is divided into urban type,industrial type and agricultural type according to the characteristic function type.The optimal selection of alternative factors is realized by principal component analysis,and the index system of functional type division accords with the development characteristics of Liaoning Province is obtained.Using multivariate statistical analysis,21 control units of Liaohe River system were divided into 4 industrial control units,5 urban control units and 12 agricultural control units.The reliability of the control unit partition results is verified.Based on the evaluation index system of water ecological environment carrying capacity of Liaohe River basin,which includes water environment,water resources,water ecology and social economy,the evaluation index system is transformed into monitoring index system according to the functional characteristic type of control unit,which includes yearbook retrieval,sampling and inspection,and supervision and investigation.In the Liaohe River basin,the control unit of Yujiafang,Panjin and Puhe along Shenyang are selected,and the reliability and accuracy of unit type division technology and monitoring index system of water ecological environment carrying capacity are verified.Through the investigation and analysis of the pollution sources and land use in the control unit and the detection results of the specific pollutants in the river,the rationality and accuracy of the monitoring index system of the water ecological environment carrying capacity are verified by the characteristic function type division technology of the control unit and the function difference.It provides a new method and technique for monitoring the water ecological environment carrying capacity Technical support.In order to improve the monitoring efficiency of water ecological environment bearing capacity evaluation index,the monitoring section and index monitoring frequency in Liaohe River system.The optimization of monitoring section of water ecological environment carrying capacity of Liaohe River system was reduced by 33% by systematic clustering method,and the F-test and T-test method were used to verify that there was no significant difference in the data samples of monitoring section index before and after optimization.Combined with the water quality characteristics of Liaohe River system,the ammonia nitrogen monitoring index in Sanhetun monitoring section is taken as an example,and the coefficient of variation method is adopted The original index monitoring frequency is reduced by 67%.The optimization results show that the method of section layout and index monitoring frequency optimization can ensure the integrity and accuracy of monitoring results and data acquisition on the basis of saving input.It can provide method support for the operational operation of water ecological environment carrying capacity monitoring scheme.