 |
| Titel |
Flow resistance of vegetated oblique weir-like obstacles during high water stages |
| VerfasserIn |
S. Ali, W. S. J. Uijttewaal |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 18, no. 1 ; Nr. 18, no. 1 (2014-01-03), S.1-14 |
| Datensatznummer |
250120241
|
| Publikation (Nr.) |
 copernicus.org/hess-18-1-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| At high water stages, obstacles (submerged and particularly emerged vegetation)
in the flood plains of a river contribute to the flow resistance and hamper the
conveyance capacity. In particular the elevated vegetated parts are expected
to play an important role. The objective of this research work is to determine the
form drag due to vegetated oblique weir-like obstacles. Experiments have been
performed to measure the energy head losses for a range of subcritical flow conditions,
varying discharges and downstream water levels. The energy head loss caused
by the submerged vegetated weir-like obstacle has been modeled using an
expansion loss form drag model that has been derived from the one-dimensional
momentum conservation equation and accounts for the energy loss associated
with a deceleration of the flow downstream of a sudden expansion. The results
have been compared with the experimental data and showed an overall good
agreement. |
| |
|
| Teil von |
|
|
|
|
|
|
|