On the basis of field-fixing-spot survey and field investigation,water erosion of rural settlements built,deserting soil erosion during constructing new caves(or houses) and the soil erosion caused by cave collapsing are studied in the loess hilly area of north Shaanxi.It concludes that:(a) From June of 2004 to October of 2004,the average water erosion intensity of rural settlements is annually 5 434.3 t/km~2.The average water erosion intensity per year of roads(between houses),open space(between houses) an...