| Abstract: | Effective management options for mitigating the loss of reservoir water storage capacity to sedimentation depend on improved predictions of bed-load discharges into the reservoirs. Most predictions of bed-load discharges, however, are based on the assumption that the rates of bed-load sediment availability equal the transport capacity of the flow, ignoring the spatio-temporal variability of the sediment supply. This paper develops a semiquantitative method to characterize bed-load sediment transport in alluvial channels, assuming a channel reach is non-supply limited when the bed-load discharge of a given sediment particle-size class is functionally related to the energy that is available to transport that fraction of the total bed-load. The method was applied to 22 alluvial stream channels in the USA to determine whether a channel reach had a supply-limited or non-supply-limited bed-load transport regime. The non-supply-limited transport regime was further subdivided into two groups on the basis of statistical tests. The results indicated the pattern of bed-load sediment transport in alluvial channels depends on the complete spectrum of sediment particle sizes available for transport rather than individual particle-size fractions represented by one characteristic particle size. The application of the method developed in this paper should assist reservoir managers in selecting bed-load sediment transport equations to improve predictions of bed-load discharge in alluvial streams, thereby significantly increasing the efficiency of management options for maintaining the storage capacity of waterbodies. ?? 2007 Blackwell Publishing Asia Pty Ltd. |
| Genre: | Article |
| ProdID: | 70029715 |
| Citation Author: | Lopes, V. L.; Osterkamp, W. R.; Bravo-espinosa, M. |
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| Citation End Page: | 72 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Lakes and Reservoirs: Research and Management |
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| Citation Number Of Pages: | 14 |
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| Citation Search Results Text: | A method for improving predictions of bed-load discharges to reservoirs; 2007; Article; Journal; Lakes and Reservoirs: Research and Management; Lopes, V. L.; Osterkamp, W. R.; Bravo-espinosa, M. |
| Citation Start Page: | 59 |
| Citation Volume: | 12 |
| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | A method for improving predictions of bed-load discharges to reservoirs; 2007; Article; Journal; Lakes and Reservoirs: Research and Management; Lopes, V. L.; Osterkamp, W. R.; Bravo-espinosa, M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1111/j.1440-1770.2007.00324.x |
| Date Other: | Mon, 1 Jan 2007 00:00 -0600 |
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