Plain river network water environment bearing capacity evaluation and early warning index system construction method

Abstract

The invention discloses a plain river network water environment bearing capacity evaluation and early warning index system construction method, and relates to the technical field of water environmentbearing capacity evaluation, and the method comprises the following steps: 1, constructing a plain river network water environment bearing capacity evaluation and early warning index system frame structure; 2, constructing an index database; 3, calculating water environment bearing capacity evaluation index data; 4, determining the weight of the water environment bearing capacity evaluation index;step 5, establishing a comprehensive index evaluation model for representing the relative size of the regional water environment bearing capacity; 6, evaluating and calculating a comprehensive indexevaluation value of the water environment bearing capacity; step 7, determining a value and grading; and step 8, comparing the comprehensive index evaluation value with the value division grade of thewater environment bearing capacity, determining the regional water environment bearing capacity state, and carrying out corresponding early warning report according to the value division grade. The method is easy to operate and use, and response measures are provided after prediction and analysis through evaluation and early warning of the environmental bearing capacity.

Description

technical field [0001] This application relates to the technical field of water environment carrying capacity assessment, in particular to a method for assessing the water environment carrying capacity of plain river networks and constructing an early warning index system. Background technique [0002] The problem of urban water environment in the plain river network area is very prominent, and it is difficult to control it. The main manifestations are: first, the rapid development of the city caused the encroachment of the river course and the high pollution load in the river; second, the severe division of the water system, poor connectivity, and weak hydrodynamic force; third, the prominent problems of black and odorous water and eutrophication. The compliance rate of water function areas is low. These problems have become a major bottleneck for sustainable urban development. As a basic element affecting social and economic development, the water environment plays a vit...

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Problems solved by technology

[0004] my country's river basin pollution control has experienced more than 30 years of development history. The water environment management of the river basin is mainly based on the water quality target management model of the administrative area, which artificially splits the transmission process of pollutants from source to sink, and increases the environment of the upstream and downstream administrative areas. Difficulty in management, failing to conduct overall management of rivers from the basin level; the goal of water quality management is a single water pollutant, and there is no sufficient understanding of water ecological functions

At the same time, as an important means of river basin water quality target management, the total amount control is based on the total amount control of pollutant discharge administrative targets, without considering the total amount control and water quality response, resulting in a disconnect between total amount control and water quality improvement results

[0005] Since the current research on water environmental carrying capacity is mainly concentrated on large-scale research at the provincial level or a certain river basin, there are very few studies at the county level, and there are few reports on county-level water environmental carrying capacity in river network areas.

Moreover, the existing water environment carrying capacity evaluation index system overlaps with the narrow concept of water environment capacity, without considering the economic benefits of limited water environment capacity resources, which is in line with the current national level of high-level protection of the ecological environment to promote high-quality economic development. Out of touch, in need of improvement

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