减洪减沙效益是其它效益的基础，经济效益是各种效益的目的。
Reducing of flood and sediment is the basis of other benefits and economical benefit is the aim of other benefits.
水土保持主要有减洪减沙效益、经济效益、社会效益和生态效益。
The benefits of soil and water conservation mainly include the economic, social and ecological benefits and the benefits of reducing flood and sediment.
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.
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