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根据弯道环流水沙分流原理，论证了河道凹岸坍塌后，泥沙横向交换淤积在凸岸，并用几何法估算出凸岸积沙量．同时运用输沙率法和所面法对河段内悬移质、推移质泥沙的冲淤量进行了估算．这些估算方法的提出，为有计划地开采河沙资源，合理收费，提供了可靠的依据。该估算方法自１９８０年８月先后在饮马河流域九台辖区２０余处沙场试用，都取得可喜成效，与以往估算方法相比，精度明显提高。
According to the diversion principle of runoff and sediment in the curve circulation, it is demonstrated that the sediment is laterally exchanged and silted in the convex bank after the collapse of the concave bank of the river, and the sediment discharge of the bank is estimated by the geometric method. At the same time, using the method of sediment transport and surface method, the amount of scouring and silting of suspended sediment in the river reach is estimated. These estimation methods are proposed to provide a reliable basis for the planned collection of sand and sand resources and reasonable charging. Since August 1980, this estimation method has been used in more than 20 sites in the Yinuhe River Basin, Jiutai District, and has achieved gratifying results. Compared with the previous estimation methods, the accuracy has been significantly improved.