今年全国不少地区遭到暴雨和洪水的袭击。发生洪水的最基本原因是特大暴雨,但是,气象因素所能造成洪害的灾情和损失大小,还同自然植被覆盖率、植被类型、树种组成、地质构造、水土保持、水利工程质量和农业耕作制度等直接有关.森林在其中起着极其重要的作用。 In many parts of the country this year, there have been rains and floods. The most basic reason for the flood is heavy rainfall. However, the meteorological factors can cause flood damage and the size of the loss, but also with the natural vegetation coverage, vegetation types, tree species composition, geological structure, soil and water conservation, water quality and agricultural farming System etc. The forest plays an extremely important role in it.