Flood control risk assessment method for left bank area of engineering area in water diversion engineering

Abstract

The invention relates to a flood control risk assessment method for a left bank area of an engineering area in a water transfer project, which takes a catchment basin corresponding to a hydraulic structure involved in the water transfer project as an assessment unit, and comprises the steps of original flood control design condition change assessment, analysis of influence of basin underlying surface change on design flood, and evaluation of the flood control risk of the engineering area; wherein calculation is carried out to obtain a flooding area, a flooding water level and a flooding water depth by aiming at the units with flood control design conditions changed compared with the original design and influence of basin underlying surface condition change on the design flood, and the flood economic loss and population influence consequences are evaluated. The method has the beneficial effects that by adopting a systematic and scientific risk assessment method, flood control influence risks of catchment basins corresponding to various types of buildings involved in a water diversion project can be quantitatively assessed. The method comprises analyzing and evaluating the change degree of an existing actual flood discharge condition compared with an original flood control design condition, the change of design flood, the submerged depth and the submerged range of an evaluation unit which influences the watershed design flood due to the change of the original flood control design condition and the change of an underlying surface, and the influence of corresponding social economy, population and the like; therefore, scientific and technical support is provided for flood control and disaster reduction and planning and construction of hydraulic engineering.

Description

technical field [0001] The invention relates to the technical field of flood control of water diversion projects, in particular to a method for assessing flood control risks of water diversion projects on the left bank of the engineering area. Background technique [0002] After the construction of the inter-basin water diversion project, some areas with original slope flow were changed to concentrated outflow, and some small rivers were merged and diverted, which cut off or changed the discharge channel of the natural flood of the water diversion project, and changed the conditions of river production and confluence. Leading to river closure, Yonggao and other situations. In the preliminary design of water diversion projects, the assessment of local flood control impacts has been carried out, and corresponding measures have been taken to deal with the flood control impacts of buildings. Conditions and local social and economic conditions have undergone some changes, especi...

AI Technical Summary

Problems solved by technology

In the preliminary design of water diversion projects, the assessment of local flood control impacts has been carried out, and corresponding measures have been taken to deal with the flood control impacts of buildings. Conditions and local social and economic conditions have undergone some changes, especially in the northern region, where the underlying surface of the river and the work conditions have changed greatly

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