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本文介绍了河口闸下泥沙淤积原理并作出了对策。河口治理,指的是为改善河口航运、排洪等,所进行的改造、加固、治理或稳定河流的工程[1]。包括疏浚和修建整治建筑物。河口的冲淤演变是水流、泥沙与河床相互作用的结果。河口泥沙有不同来源,可以由上游径流或口外沿岸流挟带而来,泥沙的粒径与浓度也不同,河口的河床演变常常复杂多变。因此河口河床的自然演变往往不能符合人类开发利用河口的要求,如河口淤积将影响排洪或航运,需要进行治理,扩大过水断面,加深河槽,才能满足排洪和航运的要求。本文将重点讲述河口闸下泥沙淤积原理及对策。
This paper introduces the principle of sediment deposition under the river mouth and makes some countermeasures. Estuary governance refers to the project of rebuilding, reinforcing, controlling or stabilizing the rivers in order to improve estuary shipping and flood discharge [1]. Including dredging and construction of rehabilitated buildings. The estuarine erosion and siltation evolution is the result of the interaction of water flow, sediment and riverbed. Estuaries have different sources of sediment, which can be entrained by upstream runoff or off-shore coastal flows. The sediment size and concentration are also different, and the river bed evolution is often complicated and changeable. Therefore, the natural evolution of estuarine riverbed often can not meet the requirements of mankind’s development and utilization of estuaries. For example, siltation of estuaries will affect flood discharge or shipping, which requires treatment, expansion of cross-sections and deepening of river channels to meet the requirements of flood discharge and shipping. This article will focus on the sediment deposition principle and countermeasures under the gate.