Appropriate estimates of the sediment yielded and delivered within a river system are required for a master plan of sediment control. Sediment delivery depends on the sediment transport potential of the stream reaches, the amount of available sediment and the resistivity among the reaches. Even in cases of macroscopic handling, these factors should be evaluated with equal accuracy to properly cope with sediment problems.
The sediment transport potential of stream reaches may be evaluated by the product of drainage area
Ad and bed inclination
S, without regard to the manner of transportation. The applicability of AdS as an index for the sediment transport potential is discussed in this paper through an examination of a number of reports.
The sediment actually transfered to the next reaches may be correlated to (
AdS)
2. However, the stream segments with certain AdS values delivered a considerably wide-ranged amount of sediment, which was due to the amount of available sediment. In fact, the streams that delivered no sediment are frequently among those of low AdS value in the headwaters. Hewever, downstream or with an increase in the stream order, the deliverd sediment increased in a manner that confirms the proportionality to AdS.
The index AdS may therefore be considered useful for the evalution of the stream's sediment transport potential.
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