多沙河道中的泥沙治理

Treatment of sand inmulti-sand river

为解决多沙河道中淤积泥沙资源化利用困难和生态景观差的问题,以嘎斯汰河泥沙治理为例,分析水沙过程及河床演变规律,采用梯级跌水沉沙和景观坝相结合的方法治理泥沙,能够在洪水期上拦粗沙以资源化利用,下排细沙以改善淤积形态;在非洪水期中下段实现清水满槽,提高了植物成活率,对水生态系统的构建有重要意义,并为后续工程提供借鉴。

To deal with the difficulty of sand resource reuse and ecological landscape problem caused by sand siltation in the multi-sand river,taking the Gasitai River’s treatment as an example,we analyze the laws of sand-water process and riverbed evolution.Blocking up the coarse sand to reuse and discharging fine sand to improve sedimentation morphology in the flood period,and filling the mid-lower channel with clean water in the non-flood period by the terraced dropping and landscape dam,we can raise the survival rate of plants and improve the construction of downstream water ecosystem,meanwhile provid reference for subsequent projects.