Author(s): W. H. Graf; Z. Qu

Linked Author(s): W.H. Graf

Keywords: Rating curve; Hydrograph; And unsteady flow

Abstract: Rating curves are indicators, by which readings of the flow depth are converted to discharge. Such rating curves show unique relations when the flow is steady, uniform. However, for unsteady flows, such as hydrographs, these rating curves show characteristic loops, implying non-unique relations. The passage of a hydrograph is investigated, focusing on the basic hydraulic parameters, namely mean velocity, discharge and flow depth, and subsequently, on other important parameters, such as friction velocity and friction coefficient. The sequence of arrival of the peaks is thus demonstrated (see Fig. 3).

DOI:

Year: 2003