平面二维挟沙力公式系数的确定

Determining the Coefficient for Sediment-carrying Capability Formula of Two-dimensional Plane

水流挟沙能力反映了运动水体所能挟带泥沙的最大能力,确定水流挟沙力公式对于泥沙数学模型的发展具有重要意义,而关键是其系数的最佳确定。通常挟沙力公式在实际应用时都要用实测资料对系数进行率定,对李义天的平面二维挟沙力公式,利用最小二乘法与灰色关联度相结合对其系数进行确定。

Sediment-carrying capability of water flow means the maximum capability of water flow to carry sediment. The sediment carrying capability formula could develop sediment 2D plane models, and the key problem is to determine its coefficients in the best way. Generally, determining the coefficient for the sediment carrying capability formula must use the survey data under the real applying, this paper applied the least square method and grey incidence degree to determining the coefficient for Li Yi-tian＇s sediment-carrying capability formula of 2D plane.