太平洋西北内陆地区的陡坡冬小麦地在冬季经常产生水蚀。作物残茬和冬小麦幼苗等地被物一般很难防止径流的产生。当表层冻土融化而较深土层仍被冻结时，如有融雪径流或降雨，土壤流失尤为严重。在BengeWA地区坡度大于40％的小麦地中，深秋季节沿等高线每隔3.7m或6.0m开一条25cm或60cm深的截流沟，可有效地减少土壤流失量，增加地表径流入渗量，且不会造成小麦减产。 Steep slopes in the Pacific Northwest Inland winter wheat often produces water erosion in winter. Crop residues and winter wheat seedlings and other objects generally difficult to prevent runoff generation. Soil erosion is particularly severe when surface frozen soil melts and deeper layers are still frozen, with snowmelt runoff or rainfall. In the wheat field with a gradient of more than 40% in the BengeWA area, a 25cm or 60cm depth of cutoff ditch every 3.7m or 6.0m along the contour line during the autumn seasons can effectively reduce soil loss and increase surface runoff infiltration, And will not cause wheat cut.