The traditional guiding ideology and treatment on soil erosion control pay attention to ecological and economic benefits of the harnessing area,which will reduce the sediment yield.However,the reduction of sediment could lead to the decrease of water,which will aggravate the water contradiction between upstream and downstream in the water source areas of Beijing and Tianjin.Environmental effects of slope measures on water and sediment were studied by investigation and location experiment in Dadai Watershed ...
修改评论