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以维利坎诺夫含沙量分布公式为据，从理论上导出其相应的悬沙级配Ｐｉ分布式，且给出Ｐｉ／Ｐ０ｉ、Ｐｉ／Ｐｉｐｊ及Ｐｉ／ＰｉｐｊＱ三种表达形式．悬沙级配沿垂线分布概念的产生及其理论公式的导出，有助于深化悬移质运动机理的认识，以及对实测悬沙级配误差的修正
Taking Velikonov sediment concentration distribution as an example, we derive the corresponding Pi-distribution of suspended sediment gradients theoretically, and give three expressions Pi / P0i, Pi / Pipj and Pi / PipjQ. The generation of the vertical distribution of suspended sediment gradation and the derivation of its theoretical formula help to deepen the understanding of the mechanism of suspended matter movement and correct the error of measured suspended sediment distribution