基于河流冲淤平衡理论的库区疏浚方案分析研究——以交口水库为例

Study on dredging program in reservoir area based on balance theory of river erosion and deposition:Taking Jiaokou Reservoir as an example

陕西石川河交口水库疏浚工程量较大,水库蓄水运用后,能否确保疏浚库区不淤积是该工程成败的关键。本文根据河流冲淤平衡原理,分析论证了水库终极库容形成后的库区横断面形态,按照该横断面轮廓线以下的范围将被淤积物覆盖的原则,对原疏浚方案进行了优化,使疏浚工程量明显减少。

The volume of dredging works of the Jiaokou Reservoir on Shichuan River in Shaanxi is very large,whether the sedimentation calculation will occur in the reservoir area or not after its impoundment is the key to success of the project.This paper analyzed and demonstrated the cross section shape in the reservoir area after the ultimate capacity formed based on the balance principle of silting and scoring,optimized the original dredge program in accordance with the principle of the range covered by sediments under the cross section contour of the ultimate capacity and reduced the amount of dredging significantly.