. Effects of gravel morphology on fine sediment accumulation and survival of incubating salmon eggs. Salmon; Sedimentation and deposition Research. METHODS Two separate experiments were conducted; one to evaluate the short term accumulation of fine sediment under different waterflow conditions as affected by gravel shape and the second to relate gravel shape to long term fine sediment accumulation and to sur- vival of incubating salmon embryos. Short Term Fine Sediment Accumulation Gravels varying from to cm in diameter were hand picked and separated into angular and round classes.
. Effects of gravel morphology on fine sediment accumulation and survival of incubating salmon eggs. Salmon; Sedimentation and deposition Research. METHODS Two separate experiments were conducted; one to evaluate the short term accumulation of fine sediment under different waterflow conditions as affected by gravel shape and the second to relate gravel shape to long term fine sediment accumulation and to sur- vival of incubating salmon embryos. Short Term Fine Sediment Accumulation Gravels varying from to cm in diameter were hand picked and separated into angular and round classes. The gravel came from a presently dry portion of the channel of East Creek. The selected dry gravels were placed in number 10 cans, weighed, and then buried just below the "gravel pavement" layer in the experimental stream channel. Water was then conducted into the channel and flows brought to designated levels until a steady flow was reached. In 1971, four experimental runs were made at flow rates of m3/s, m3/s, m3/s, and 5 m3/s. Two additional runs were made in 1973 at m3/s and m3/s. Experimental procedure was as follows: a) Flow rate to be sampled was allowed to stabilize in the test section and was allowed to run until erosion armor formed and observable bed- load transport ceased. b) The flow was then stopped and 10 sample cans, 5 with angular gravel and 5 with round gravel, were buried in the test section with the can mouths below the armor and the gravel flush at the sur- face of the channel (fig. 5). Approximately 104 kg of fine sediment < mm (in the short. 4 Figure 5.—Diagram of test section showing dimensions and location of sediment sample Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Meehan, William R. cn; Swanston, Douglas N; Pacific North
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectsalmon
