Sediment transport and siltation of brown trout (Salmo trutta L.) spawning gravels in chalk streams

✍ Scribed by R. M. Acornley; D. A. Sear

• Book ID: 101283293
• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 156 KB
• Volume: 13
• Category: Article
• ISSN: 0885-6087
• DOI: 10.1002/(sici)1099-1085(19990228)13:3<447::aid-hyp749>3.0.co;2-g

✦ Synopsis

Deposition rates of ®ne sediment into brown trout spawning gravels were measured at monthly intervals for a period of one year in a small channel of the River Test, Hampshire. Data were also collected on stream discharge, water depth, ¯ow velocity and suspended sediment concentrations. Deposition rates followed a seasonal pattern and were maximal during periods of high discharge in the late winter/early spring when suspended sediment concentrations were high. The material deposited in the spawning gravels included silts and ®ne sands (5250 mm) that were transported in suspension and coarser fragments of low density tufalike material that were transported as bed load. The ecological implications of ®ne sediment deposition for salmonid egg survival in chalk streams are considered.