Sediment transport and siltation of brown trout (Salmo trutta L.) spawning gravels in chalk streams
Sediment transport and siltation of brown trout (Salmo trutta L.) spawning gravels in chalk streams
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褐鳟（Salmo trutta L.）在白垩溪流中产卵砾石的沉积物输送和淤积
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
D. Sear
中科院分区：
文献类型：
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作者：
R. Acornley;D. Sear
在一年的时间里，在汉普郡Test河的一条小河道中，每月测量一次细沉积物沉积到褐鳟产卵砾石中的速率。此外，还收集了河流流量、水深、流速和悬沙浓度等数据。沉积速率随季节变化，在冬末/早春高流量期间最大，此时悬沙浓度较高。在产卵砾石中沉积的物质包括悬浮运输的粉砂和细砂（<250 μm），以及作为床载运输的低密度凝灰岩样物质的较粗碎片。细沉积物沉积对白垩溪流中鲑鱼卵存活的生态影响被考虑。
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 tufalike material that were transported as bed load. The ecological implications of fine sediment deposition for salmonid egg survival in chalk streams are considered.