EQUATIONS FOR GRAIN SIZE DISTRIBUTION CURVE  

作　　者：Prabhata K.SWAMEE Nimisha SWAMEE 

机构地区：[1]Emeritus Fellow, Indian Inst. of Tech. Roorkee, Roorkee 247 667, India.,B.E. (Civil) Student, GZS College of Engrg. and Tech.,Bhatinda 151 001,India.

出　　处：《International Journal of Sediment Research》2004年第1期66-74,共9页国际泥沙研究（英文版）

摘　　要：The grain size distribution of particulate material is of particular interest in the field of sediment transport. The size distribution is described by various equations, however no equation is flexible enough to satisfy the grain size distribution data faithfully. Presented herein are the equations for unimodal and multimodal grain size distribution curves. A graphical method has been given to evaluate the parameters involved in these equations. The size distribution equation can be used to estimate many properties of sediment sample like number of sediment particles, surface area of the particles and hydraulic conductivity. It is hoped that the equations will find many applications in studying sedimentation processes.The grain size distribution of particulate material is of particular interest in the field of sediment transport. The size distribution is described by various equations, however no equation is flexible enough to satisfy the grain size distribution data faithfully. Presented herein are the equations for unimodal and multimodal grain size distribution curves. A graphical method has been given to evaluate the parameters involved in these equations. The size distribution equation can be used to estimate many properties of sediment sample like number of sediment particles, surface area of the particles and hydraulic conductivity. It is hoped that the equations will find many applications in studying sedimentation processes.

关 键 词：Bimodal distribution Grain number Grain size gradation Hydraulic conductivity Multimodal distribution SEDIMENT Surface area Unimodal distribution 

分 类 号：TV142[水利工程—水力学及河流动力学]