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陕北綏德为无定河下游的黄土邱陵溝壑區,韮園溝和辛店溝(见附图1)均可代表该區自然和社会經济情况,其地形是邱陵起伏,溝壑縱横,平均年降雨量451.4毫米,60％集中在7、8、9三个月,多暴雨,水土流失極为嚴重。根据查勘推算,每年平均冲刷深度为4～8毫米,即每平方公里冲刷量为4,000～8,000公方。自1953年起,绥德水土保持站在韮園溝及辛店溝開始進行水土流失的测驗研究,并采取农、林、牧、水各項水土保持措施,观測單項和綜合的水
Suide, northern Shaanxi Province, is the loess Qionglai gully area in the lower reaches of Wudinghe River. Both the Jiuyuan ditch and Xindian ditch (see Figure 1) can represent the natural and social economic conditions of the area. The topography is characterized by ups and downs, ravines, The average annual rainfall of 451.4 mm, 60% concentrated in the 7,8,9 three months, more rain, soil erosion is extremely serious. According to the investigation and calculation, the average erosion depth is 4 to 8 millimeters per year, that is, 4,000 to 8,000 square kilometers of erosion per square kilometer. Since 1953, Suide Soil and Water Conservation Station began to test soil and water loss in Jiuyuangou and Xindiangou and adopted soil and water conservation measures of agriculture, forestry, animal husbandry and water to observe single and integrated water