关键词: 水土流失, 滑坡, 沟蚀

Abstract: The dry river valleies of Wen Chuan aud Mao county in the upper course of Ming Jiang are the main regions for apple Production and the important protective areas of ecology of Ming Jiang valley. Now the soil and water loss is serious in the (areas).There are strong gully erosion, often sheet erosion, very common slip and sometimes block glacier. Winding erosion gives rise to serious sandification in parts of the valleies. The causes of the above are rare. plant cover, bad protective land surface, deep river valley, loose structure, weak risistance to erosion, over cutting of forest and planting of steep slopes.

Key words: SOIL AND WATER LOSS, LANDSLIDE, CULLY EROSION