Safety assessment system for river water environment of plain river network

Abstract

The invention discloses a safety assessment system for a river water environment of a plain river network, and belongs to the field of water environment safety assessment. By taking a DPSIR model as a theoretical basis, water environment safety assessment indexes are divided into five aspects of social and economic driving force, a pollution source and water resource development pressure, a water environment health present condition, a river service function and an environment supervision capability, and twenty assessment indexes including permanent population density, GDP per capita, a building land use proportion and the like are established. The water environment safety assessment process comprises the specific steps of obtaining a survey value for assessing an index of each layer of a river; determining an assessment standard value of the index; performing standardization processing of the survey value of the index; calculating an index score of a river water environment safety assessment index layer; calculating an index score of a river water environment safety assessment criterion layer; and calculating and assessing a river water environment safety index. According to the system, a scientific assessment method is established for the plain river network, and the water environment safety condition and problem of the plain river network can be quickly and effectively identified.

Description

technical field [0001] The invention relates to the field of water environment safety assessment, in particular to a plain river network and river water environment safety assessment system. Background technique [0002] Water environment security is defined as from the human point of view, the water environment maintains sufficient water quantity and safe water quality conditions to maintain its normal ecosystem structure and function, meet the needs of human production, life, and flood control, and enable human production and living activities in a state of sustainable development. Water environment security means that it can perform its functions normally and achieve the best service of the water environment. The issue of water environment security not only reflects the supporting capacity of the water environment itself, but more importantly, it reflects the degree of human interference with the system and the construction of the ecological environment. and protection; ...

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Problems solved by technology

Among the published patent documents, Chinese invention patent, publication number: 104915805A, publication date: 2015.9.16, discloses a river ecological restoration effect evaluation method, from the physical conditions of the river bank, water quality and hydrology, aquatic organisms and river functions. The assessment of river water ecological restoration in four aspects belongs to the category of water environment ecological health assessment, and the index structure is simple, lacking the consideration of the impact of human activities on water environment security and the response of water environment

[0004] At present, the definition of water environment safety evaluation objects mainly focuses on the evaluation of regional and urban water environment safety, and only evaluates the level of regional water environment safety. Authors: Han Yuping, Ruan Benqing, "Preliminary Research on Regional Water Safety Evaluation Index System", published in " According to the Chinese Journal of Environmental Science, there are few water environment security assessments for river basins. If the regional assessment system is used to measure the water environment security of river basins, the index system is not perfect, especially because the regional water exchange capacity is limited.

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