Our aim is to provide insight into various suspended sediment transport phenomena of upland ephemeral streams in a semiarid environment. Information about suspended sediment concentration is derived with the help of a programmable pump sampler and the continuous record of a turbidity sensor. Suspended sediment concentrations are high; the mean during six years of measurements was 34 000 mg l-1 and regression of suspended sediment concentration on water discharge takes the form SSC = 104.41 Q0.42 During individual flash floods, the suspended sediment-water discharge relation may be hysteretic (clockwise or counterclockwise) and/or monotonic. In spite of complicated intra-event behaviour, there is a good, deterministic (R2 > 0.9) relation between total suspended sediment yield and flood volume.
|Number of pages||7|
|State||Published - 15 May 2003|
- Flash flood
- Hysteretic response
- Suspended sediment yield