- falling (Falls) is a fast moving down the hillside or a steep cliff. By the influence of gravity of the world may be the first freely or rolling down the hillside in. The water involved little or no involvement. So the sediment or rock collapse to the accumulated in the foothill area or that cliff. If a stone cliff and sediment falling mostly rock, called "Rock fall" (Figure 1, and 2). And if the soil and sediment has coarse grain soil, called "Debris fall." and if the sediment ที่ตกลงมา is fine grained soil is called "Earth fall."
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