A method that enables good estimates to be made of total sediment load has been tested with data from several western streams. The method, which uses both theoretical and empirical formulas, combines a modification of Einstein's procedure for computing bed‐material load and the usually available data from suspended‐sediment measurements. Basic data, including data from large natural and artificial turbulent flumes, and the results of computations are given.

No abstract

Basically, any theory consists of a set of assumptions and various conclusions which are logically derived therefrom. An assumption, as the term is to be used here, may be based on an observed fact or relationship, a definition, an undefined (but generally accepted and understood) concept; or it may be based on a postulated relationship which has not been observed and may not even be directly observable. The conclusions of a theory in the physical sciences are, of course, intended to agree with and to predict observable facts. If a theory does not thus coincide with reality, it is eminently proper to examine the assumptions and the logical structure of the theory and, if possible, to modify the assumptions or correct the logic so that the conclusions do agree with observed facts.

No abstract

No abstract