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Sediment transport and siltation of brown trout ( Salmo trutta L.) spawning gravels in chalk streams
Author(s) -
Acornley R. M.,
Sear D. A.
Publication year - 1999
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/(sici)1099-1085(19990228)13:3<447::aid-hyp749>3.0.co;2-g
Subject(s) - siltation , streams , deposition (geology) , sediment , salmo , hydrology (agriculture) , brown trout , sediment transport , geology , environmental science , fishery , geomorphology , geotechnical engineering , fish <actinopterygii> , computer network , computer science , biology
Deposition rates of fine 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, flow 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 fine sands (<250 μm) that were transported in suspension and coarser fragments of low density tufa‐like material that were transported as bed load. The ecological implications of fine sediment deposition for salmonid egg survival in chalk streams are considered. Copyright © 1999 John Wiley & Sons, Ltd.