T/CI 058-2023 Composite pollution river treatment and restoration technology guideline

Scope

Scope: This document provides treatment and restoration technologies for composite polluted rivers, mainly including general requirements, exogenous pollution control technologies, riverbed sediment treatment technologies, water quality improvement technologies, ecological restoration technologies, and guidance and suggestions on operation and management. This document is applicable to the treatment and restoration of composite polluted rivers, and other polluted rivers can refer to and use it for reference. Main technical content: General requirements 4.1 Design principles 4.1.1 Safety and rationality principle. The treatment measures shall not affect the original functions of the river, such as flood control, drainage, water supply, and navigation. 4.1.2 Ecological priority principle. Maximally reduce damage to the ecological environment and occupation of land resources, and adopt ecological methods to reduce and intercept pollutants in the river water body, maintain the ecological niche of the river, and restore its ecological function. 4.1.3 Site-specific principle. Make full use of the existing morphology, topography, and hydrology of the river to select suitable treatment technologies, and prioritize the selection and configuration of plant species with local species. 4.1.4 Functional coordination principle. The river treatment shall fully consider the ecological, environmental, landscape, recreational, and water conservancy functions of the river, promote the integrated management of the river system, and achieve co-governance of water and banks. 4.1.5 Economic feasibility principle. Coordinate pre-construction and post-maintenance to minimize pre-construction costs and post-maintenance fees, and achieve the unification of ecological and environmental benefits and economic benefits of river treatment. 4.1.6 Environmental friendliness principle. The materials, organisms, and processes used in river treatment shall not cause secondary pollut

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