Correspondingly,10% of control degree increase in medium value benefit zone and low benefit value zone will lead to 8% and 3.4% increase in sediment reduction respectively.

• 减沙效益中值区的治理度提高10%25；减沙效益提高8%25; 减沙效益低值区的治理度提高10%25；减沙效益只能提高3.；4%25。