Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers
This paper aims to implementing and run a study hydraulic simulation model by using the HEC-RAS software to simulate the flow in AL-Msharah River and studying the effect of floating debris accumulation on Al-Msharah Bridge piers on the flow conditions upstream the bridges and estimating the scour de...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Al-Nahrain Journal for Engineering Sciences
2015-01-01
|
| Series: | مجلة النهرين للعلوم الهندسية |
| Subjects: | |
| Online Access: | https://nahje.com/index.php/main/article/view/142 |
| _version_ | 1819237988203233280 |
|---|---|
| author | Ala Hassan Nama Zahraa Abdulhussain |
| author_facet | Ala Hassan Nama Zahraa Abdulhussain |
| author_sort | Ala Hassan Nama |
| collection | DOAJ |
| description | This paper aims to implementing and run a study hydraulic simulation model by using the HEC-RAS software to simulate the flow in AL-Msharah River and studying the effect of floating debris accumulation on Al-Msharah Bridge piers on the flow conditions upstream the bridges and estimating the scour development according to this effect.
All the required geometric, hydrological and riverbed material data were provided by Ministry of Water Resources, Iraq. These data were adopted for implementing the hydraulic simulation model. The effects of debris accumulation at the bridge piers were studied according to the present state of the river through considering six inflow discharge 5, 10, 15, 20, 25, and 30 m3/sec each with a range of floating debris dimensions (width, m × depth, m) up to (2m×2m).
Results of applying the implemented hydraulic model showed that accumulation of debris on the bridge piers for more than 1m×1m increase the water surface elevation upstream the bridge to about 1m with the case of maximum discharge of 30m3/sec and debris of 2m×2m and increase the flow velocity and changing the flow velocity distribution within the bridge cross-section by about 15 to 20%.
The total main channel scour depth increase from 0.77 m for the case of no debris with minimum discharge, 5 m3/sec, to 1.9 m for the case of 2m×2m debris with maximum discharge, 30 m3/sec.
According to these results it is recommended that accumulated debris on AL Msharah Bridge piers must be carefully monitoring when its dimensions became more than 1m×1m and it must be removed from the bridge piers when its dimensions become more than 2m×2m because the resulted scour damage the bridge |
| first_indexed | 2024-12-23T13:29:04Z |
| format | Article |
| id | doaj.art-5640f59347da45e29b60211abd8d03e8 |
| institution | Directory Open Access Journal |
| issn | 2521-9154 2521-9162 |
| language | English |
| last_indexed | 2024-12-23T13:29:04Z |
| publishDate | 2015-01-01 |
| publisher | Al-Nahrain Journal for Engineering Sciences |
| record_format | Article |
| series | مجلة النهرين للعلوم الهندسية |
| spelling | doaj.art-5640f59347da45e29b60211abd8d03e82022-12-21T17:45:14ZengAl-Nahrain Journal for Engineering Sciencesمجلة النهرين للعلوم الهندسية2521-91542521-91622015-01-01181142Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge PiersAla Hassan Nama0Zahraa Abdulhussain1Water Resources Eng. Dept – Collage of Engineering – University of Baghdad, Baghdad, Iraq.Center for Restoration of Iraqi Marshland and Wetlands- Ministry of Water Resources, Baghdad, IraqThis paper aims to implementing and run a study hydraulic simulation model by using the HEC-RAS software to simulate the flow in AL-Msharah River and studying the effect of floating debris accumulation on Al-Msharah Bridge piers on the flow conditions upstream the bridges and estimating the scour development according to this effect. All the required geometric, hydrological and riverbed material data were provided by Ministry of Water Resources, Iraq. These data were adopted for implementing the hydraulic simulation model. The effects of debris accumulation at the bridge piers were studied according to the present state of the river through considering six inflow discharge 5, 10, 15, 20, 25, and 30 m3/sec each with a range of floating debris dimensions (width, m × depth, m) up to (2m×2m). Results of applying the implemented hydraulic model showed that accumulation of debris on the bridge piers for more than 1m×1m increase the water surface elevation upstream the bridge to about 1m with the case of maximum discharge of 30m3/sec and debris of 2m×2m and increase the flow velocity and changing the flow velocity distribution within the bridge cross-section by about 15 to 20%. The total main channel scour depth increase from 0.77 m for the case of no debris with minimum discharge, 5 m3/sec, to 1.9 m for the case of 2m×2m debris with maximum discharge, 30 m3/sec. According to these results it is recommended that accumulated debris on AL Msharah Bridge piers must be carefully monitoring when its dimensions became more than 1m×1m and it must be removed from the bridge piers when its dimensions become more than 2m×2m because the resulted scour damage the bridgehttps://nahje.com/index.php/main/article/view/142ScourFloating DebrisAccumulation and Al-Msharah Bridge |
| spellingShingle | Ala Hassan Nama Zahraa Abdulhussain Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers مجلة النهرين للعلوم الهندسية Scour Floating Debris Accumulation and Al-Msharah Bridge |
| title | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers |
| title_full | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers |
| title_fullStr | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers |
| title_full_unstemmed | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers |
| title_short | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers |
| title_sort | riverbed scour due to accumulation of floating debris on al msharah bridge piers |
| topic | Scour Floating Debris Accumulation and Al-Msharah Bridge |
| url | https://nahje.com/index.php/main/article/view/142 |
| work_keys_str_mv | AT alahassannama riverbedscourduetoaccumulationoffloatingdebrisonalmsharahbridgepiers AT zahraaabdulhussain riverbedscourduetoaccumulationoffloatingdebrisonalmsharahbridgepiers |