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| Content Provider | Springer Nature Link |
|---|---|
| Author | Gualtieri, Carlo Chanson, Hubert |
| Copyright Year | 2011 |
| Abstract | A positive surge is a unsteady open channel flow resulting from the rapid rise of the free-surface. The phenomenon may be observed in water supply canals and channels as well as in some estuaries during spring tidal conditions. The formation and development of positive surges can be predicted using the method of characteristics and shallow water equations. The paper is the second part of a study presenting the results from new experimental investigations conducted in a large rectangular channel. Detailed unsteady velocity measurements were performed with a high temporal resolution using acoustic Doppler velocimetry and non-intrusive free-surface measurement devices. Several experiments were conducted with the same initial discharge (Q = 0.060 m3/s) and six different gate openings after closure resulting in both non-breaking undular and breaking bores. A comparison between main features of the undular surges with literature theories demonstrated that the experimental data were mostly in agreement with Andersen’s theory. The analysis of unsteady flow field including Reynolds stresses confirmed and extended previous findings about positive surge hydrodynamics. |
| Starting Page | 641 |
| Ending Page | 651 |
| Page Count | 11 |
| File Format | |
| ISSN | 15677419 |
| Journal | Environmental Fluid Mechanics |
| Volume Number | 11 |
| Issue Number | 6 |
| e-ISSN | 15731510 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-10-04 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Environmental hydraulics Positive surge Surge front Free surface measurements Instantaneous velocity field Physical modeling Undular surges analysis Unsteady flow field Reynolds stresses Environmental Physics Oceanography Mechanics Hydrogeology Meteorology/Climatology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Water Science and Technology |
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