Bed Evolution Processes after Falling Works Removal

通过实验研究了降尘系统部分拆除后上下游床层的演变过程。本文还建立了二维非结构化网格的床面演变数值模拟模型，并将其应用于试验和现场数据。床层结构的初始设置、床层的移出形状和床层物料的分布等参数对床层结构的平衡形态及其发展过程都有影响。结果表明，复杂的三维水流特性和泥沙运动，包括其分选后，去除诱导的关键问题是应用到真实的河流。

Bed evolution processes in both the upstream and downstream of a falling works after its partial removal were investigated experimentally. Numerical simulation model for bed evolution with a 2-D unstructured mesh was also developed and applied to the datasets obtained in the experiments and the field. Equilibrium bed configurations and their developing processes are influenced by several parameters such as initial setup of the structure, its removal shape and bed material distributions. The results indicate that complex 3-D flow behavior and resultant sediment motions including their sorting induced after the removal are the crucial issues for application to real rivers.