In the north of Shaanxi,the sediment reduction is mainly attributed to the dam and reservoir engineering,the DRCA of 50 000 m3/km2 can increase 10% in trap efficiency;

• 陕北片减沙效益主要由坝库工程产生。 减沙效益提高10%25,坝库单位面积库容需要提高5万m3/km2。