Journal article
Field observations of longitudinal dispersion in a run-of-the-river impoundment
Water research (Oxford), Vol.25(11), pp.1405-1415
1991
DOI: 10.1016/0043-1354(91)90119-B
Abstract
Dye studies were conducted on a run-of-the-river impoundment to observe longitudinal dispersion in a lacustrine/riverine environment. Field data were analyzed in the context of a streamtube model which accounts for dispersion by the lateral distribution of longitudinal velocity. The differential advection associated with the vertical distribution of longitudinal velocity [i.e. Elder's equation (
D
x = α
xu
∗h
)] is incorporated in this stream-tube model providing longitudinal dispersion within each tube. Model calibration attempts required α values on the order of 100, greatly in excess values expected from fluvial experience.
A diffusive stall was observed twice when the dye plume moved into a sudden expansion of channel width. The stall is predicted by Fischer's
K
x
equation. The stream-tube model reasonably reproduced the field data in a variety of initial-period conditions, caused by the highly variable geometry of Coralville Reservoir.
Details
- Title: Subtitle
- Field observations of longitudinal dispersion in a run-of-the-river impoundment
- Creators
- Deborah J Mossman - Department of Civil Engineering, Coordinated Engineering Program, University of Missouri-Columbia, Independence, MO 64050 U.S.AForrest M Holly - Department of Civil & Environmental Engineering and Iowa, Institute of Hydraulic Research, University of Iowa, Iowa City, IA 52242, U.S.AJerald L Schnoor - Department of Civil & Environmental Engineering and Iowa, Institute of Hydraulic Research, University of Iowa, Iowa City, IA 52242, U.S.A
- Resource Type
- Journal article
- Publication Details
- Water research (Oxford), Vol.25(11), pp.1405-1415
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/0043-1354(91)90119-B
- ISSN
- 0043-1354
- eISSN
- 1879-2448
- Language
- English
- Date published
- 1991
- Academic Unit
- Occupational and Environmental Health; Civil and Environmental Engineering
- Record Identifier
- 9983997986902771
Metrics
11 Record Views