森林植被通过林冠层、枯落物层和根系土壤层的分层拦截吸收，起到突出的减洪减沙作用。
Through the roles of interception and absorption of the canopy layer, litter layer, and root and soil layer, the benefits of flood and sediment reduction of forest vegetation are prominent.
我国许多河流通航不仅受到洪、枯季水位变化的影响，还受到其它因素的影响，尤其是河道上修建水电站。
Many navigable channels in our country are affected not only the mutation of water level of flood and dry weather, but also other factors. For example, the hydroelectric power station in upstream.
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