Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A new method to determine interstitial flow patterns in flume studies of sub‐aqueous gravel bedforms such as fish nests
AU - Carling, Paul Anthony
AU - Whitcombe, L
AU - Benson, Ian
AU - Hankin, Barry
AU - Radecki-Pawlik, A
PY - 2006/7/1
Y1 - 2006/7/1
N2 - Flume studies often seek to measure and record the interstitial flow within plane‐bed sediment bodies and within sediment beds with wavy surfaces, such as those typified by salmonid fish spawning nests and river‐dunes. A simple, inexpensive method is described to record and map, at discrete points, the spatial variation in interstitial flow speeds in experimental fine gravel beds. The procedure uses activated carbon granules to capture a tracer: Rhodamine WT dye. Calibration of the uptake of dye by the carbon for known interstitial flow speeds allows mapping of point flow speed data initially in the nominal x‐dimension. Using interpolation procedures available in a range of commercial ‘mapping’ software packages, the point data can be used to produce quasi two‐dimensional ‘slices’ along sampling planes within the three‐dimensional gravel bed. Similarly, three‐dimensional representations can be produced within which lines of equal current speed (‘isovels’) are interpolated such that the flow vectors (in x, y and z coordinates) may be inferred.
AB - Flume studies often seek to measure and record the interstitial flow within plane‐bed sediment bodies and within sediment beds with wavy surfaces, such as those typified by salmonid fish spawning nests and river‐dunes. A simple, inexpensive method is described to record and map, at discrete points, the spatial variation in interstitial flow speeds in experimental fine gravel beds. The procedure uses activated carbon granules to capture a tracer: Rhodamine WT dye. Calibration of the uptake of dye by the carbon for known interstitial flow speeds allows mapping of point flow speed data initially in the nominal x‐dimension. Using interpolation procedures available in a range of commercial ‘mapping’ software packages, the point data can be used to produce quasi two‐dimensional ‘slices’ along sampling planes within the three‐dimensional gravel bed. Similarly, three‐dimensional representations can be produced within which lines of equal current speed (‘isovels’) are interpolated such that the flow vectors (in x, y and z coordinates) may be inferred.
U2 - 10.1002/rra.930
DO - 10.1002/rra.930
M3 - Journal article
VL - 22
SP - 691
EP - 701
JO - River Research and Applications
JF - River Research and Applications
SN - 1535-1459
IS - 6
M1 - 6
ER -