Flood control risk identification and evaluation method for water diversion project

Abstract

The invention relates to a flood control risk identification and evaluation method for a water diversion project. The method comprises the following steps: collecting and arranging flood control dataof a water transfer project; carrying out rainfall runoff production, confluence flow capacity, channel section engineering geological characteristics and economic and social layout first-level floodcontrol risk factor identification; decomposing the first-level flood control risk factor into a second-level flood control risk factor, and constructing a flood control risk evaluation index system;performing flood control risk factor index numerical calculation and normalization processing; calculating index weights through an analytic hierarchy process; and determining and evaluating the comprehensive flood control risk level of the channel section. The invention has the beneficial effects that: starting with various risk sources and risk events involved in the whole flood disaster chain process, the system comprehensively identifies flood control risk factors of the water diversion project, constructs a corresponding evaluation index system, establishes a comprehensive flood control risk evaluation model of the water diversion project based on a risk evaluation theory, and realizes quantitative evaluation and risk grading and classification management of flood control comprehensive risks of different channel sections of the water diversion project.

Description

technical field [0001] The invention relates to a water diversion project, in particular to a flood control risk identification and evaluation method for a water diversion project, and belongs to the technical field of flood disaster risk management of water conservancy projects. Background technique [0002] With the intensification of climate change and human activities, large-scale water diversion projects play an increasingly important role in ensuring water supply security and sustainable economic and social development in water-scarce areas. As a huge engineering system, water diversion projects have long lines, often across different watersheds, river systems, and different climate zones and water receiving areas. The climate and underlying surface conditions in the project area are complex, and there are many uncertainties and risk factors. It is one of the main risks affecting the safe operation of large-scale water diversion projects. The flood control risk of the...

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Problems solved by technology

[0004] From the perspective of hydrological factors alone, heavy rain is the risk source of excessive floods, and the rise of river water level is a risk event caused by heavy rain; and for the safety of the water diversion project, the rise of river water level upstream of crossing buildings is the cause of engineering diseases. Risk source, flood damage to the project is a risk event; it may also adversely affect the local flood control on the left and right banks of the canal

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