A hydrologic regression sediment-yield model for two ungaged watershed outlet stations in Africa View Full Text


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Article Info

DATE

1991-05

AUTHORS

Osama M. Moussa, Scot E. Smith, Ramesh L. Shrestha

ABSTRACT

A hydrologic regression sediment-yield model was established to determine the relationship between water discharge and suspended sediment discharge at the Blue Nile and the Atbara River outlet stations during the flood season. The model consisted of two main submodels: (1) a suspended sediment discharge model, which was used to determine suspended sediment discharge for each basin outlet; and (2) a sediment rating model, which related water discharge and suspended sediment discharge for each outlet station. Due to the absence of suspended sediment concentration measurements at or near the outlet stations, a minimum norm solution, which is based on the minimization of the unknowns rather than the residuals, was used to determine the suspended sediment discharges at the stations. In addition, the sediment rating submodel was regressed by using an observation equations procedure. Verification analyses on the model were carried out and the mean percentage errors were found to be +12.59 and −12.39, respectively, for the Blue Nile and Atbara. The hydrologic regression model was found to be most sensitive to the relative weight matrix, moderately sensitive to the mean water discharge ratio, and slightly sensitive to the concentration variation along the River Nile's course. More... »

PAGES

177-183

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01701697

DOI

http://dx.doi.org/10.1007/bf01701697

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1026260258


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