Author(s): Roger Bettess

Linked Author(s): Roger Bettess

Keywords: Flow resistance; Roughness length; Gravel bed; Colebrook White equation

Abstract: There is a bewildering array of flow resistance equations for gravel bed rivers. This paper demonstrates that if one assumes a simple relationship between roughness length and sediment sizes then many of these equations can be reduced to the same form as the Colebrook White equation. The predictions of the various equations are compared and an assessment is made of the relative contribution of skin roughness and other forms of roughness for the field situation.

DOI:

Year: 1999