Using a bed sill as a scour countermeasure downstream of an apron
In order to protect hydraulic structures against scouring, engineers have designed and used many different types of countermeasures. In this paper, local scour downstream of a rigid apron using a bed sill is studied. The main objective of the present study was to investigate the efficiency of scour...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-12-01
|
| Series: | Ain Shams Engineering Journal |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447916301800 |
| id |
doaj-49a92f6aa2df4c8baba5f35d7e5517c5 |
|---|---|
| record_format |
Article |
| spelling |
doaj-49a92f6aa2df4c8baba5f35d7e5517c52021-06-02T08:09:24ZengElsevierAin Shams Engineering Journal2090-44792018-12-019416631669Using a bed sill as a scour countermeasure downstream of an apronH. Hamidifar0M. Nasrabadi1M.H. Omid2Water Engineering Department, Shiraz University, Shiraz, Iran; Corresponding author.Department of Irrigation and Reclamation Engineering, University of Tehran, Karaj, IranDepartment of Irrigation and Reclamation Engineering, University of Tehran, Karaj, IranIn order to protect hydraulic structures against scouring, engineers have designed and used many different types of countermeasures. In this paper, local scour downstream of a rigid apron using a bed sill is studied. The main objective of the present study was to investigate the efficiency of scour reduction by means of a single bed sill located downstream of the apron as countermeasure, and to evaluate its effectiveness at various distances from the end of the apron. It was found that the maximum scour downstream of the apron reduces up to 95%. Furthermore, variations of the characteristic lengths of the scour hole were investigated. Also, it was observed that completely buried sills may not be useful. Finally, a regression based equation is proposed to predict the shape of the scour hole with the sill. Keywords: Scour, Apron, Bed sill, Protective structures, Maximum scour depthhttp://www.sciencedirect.com/science/article/pii/S2090447916301800 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
H. Hamidifar M. Nasrabadi M.H. Omid |
| spellingShingle |
H. Hamidifar M. Nasrabadi M.H. Omid Using a bed sill as a scour countermeasure downstream of an apron Ain Shams Engineering Journal |
| author_facet |
H. Hamidifar M. Nasrabadi M.H. Omid |
| author_sort |
H. Hamidifar |
| title |
Using a bed sill as a scour countermeasure downstream of an apron |
| title_short |
Using a bed sill as a scour countermeasure downstream of an apron |
| title_full |
Using a bed sill as a scour countermeasure downstream of an apron |
| title_fullStr |
Using a bed sill as a scour countermeasure downstream of an apron |
| title_full_unstemmed |
Using a bed sill as a scour countermeasure downstream of an apron |
| title_sort |
using a bed sill as a scour countermeasure downstream of an apron |
| publisher |
Elsevier |
| series |
Ain Shams Engineering Journal |
| issn |
2090-4479 |
| publishDate |
2018-12-01 |
| description |
In order to protect hydraulic structures against scouring, engineers have designed and used many different types of countermeasures. In this paper, local scour downstream of a rigid apron using a bed sill is studied. The main objective of the present study was to investigate the efficiency of scour reduction by means of a single bed sill located downstream of the apron as countermeasure, and to evaluate its effectiveness at various distances from the end of the apron. It was found that the maximum scour downstream of the apron reduces up to 95%. Furthermore, variations of the characteristic lengths of the scour hole were investigated. Also, it was observed that completely buried sills may not be useful. Finally, a regression based equation is proposed to predict the shape of the scour hole with the sill. Keywords: Scour, Apron, Bed sill, Protective structures, Maximum scour depth |
| url |
http://www.sciencedirect.com/science/article/pii/S2090447916301800 |
| work_keys_str_mv |
AT hhamidifar usingabedsillasascourcountermeasuredownstreamofanapron AT mnasrabadi usingabedsillasascourcountermeasuredownstreamofanapron AT mhomid usingabedsillasascourcountermeasuredownstreamofanapron |
| _version_ |
1721406573313523712 |