The relation of suspended to bed material in rivers

It has been known for some time that if the average concentration of suspended sediment at any point in a wide straight stream was known, the average concentration at any other point could be determined. This was first demonstrated by O'Brien ]see 1 of ”Bibliography“ at end of paper] using the methods developed by Schmidt in a study of turbulence in the atmosphere. That the results obtained with this method agree with actual observations in streams and channels was demonstrated by Christiansen ]2[ and Richardsen ]3[. For artificial turbulence it has been checked by Hurst ]4[ and Rouse ]5[.