Analysis of sedimentation of canals
The dredged canals in the Niger Delta coastal flood plain are being threatened by siltation. This study is limited to those canals in Rivers State of Nigeria, which are under the influence of tidal waves. A total of eight canals were considered with four each from Ekulama and Cawthorne Channel. Diff...
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| Format: | Article |
| Language: | English |
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International Society for Development and Sustainability (ISDS)
2013-03-01
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| Series: | International Journal of Development and Sustainability |
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| Online Access: | http://isdsnet.com/ijds-v2n1-22.pdf |
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| author | Agunwamba, J.C., Dike, C.C. Ogarekpe, N.M. Dike, B.U |
| author_facet | Agunwamba, J.C., Dike, C.C. Ogarekpe, N.M. Dike, B.U |
| author_sort | Agunwamba, J.C., |
| collection | DOAJ |
| description | The dredged canals in the Niger Delta coastal flood plain are being threatened by siltation. This study is limited to those canals in Rivers State of Nigeria, which are under the influence of tidal waves. A total of eight canals were considered with four each from Ekulama and Cawthorne Channel. Different approaches were used to carry out this study, which includes field reconnaissance survey, hydrographic survey, soil sample analysis and collection of all available data and information. The typical bed materials size (D50) is approximately 0.01mm; which gives a settling velocity of 0.09mm/sec using stroke’s law. Hydrographic survey of the canals from 1992 to 1996 revealed an
average siltation rate of 2.35m/yr. A regression equation was also derived which relates the cost of dredging to canal area, rate of siltation and average aggregation. A plot of canal centre profile; entrance, middle and end cross sections showing sediment distribution along the canal profile, shows that majority of the particles that form the sediment enter the canal from the rivers. The sedimentation is caused by the reduction in water current, which has average value of 0.0145m/sec. The bathyorographical check on the canals revealed that the sum of the two exterior angles of the canal with the river at the point of connection has to lie within 1800 + 50 for an effective flow that will minimize settlement of particles. In addition, the canals should be constructed to start and terminate on a moving water body, to avoid dead ends. A regression equation was determined which relates the cost of dredging to canal area, rate of
siltation and average aggradations. |
| first_indexed | 2024-12-12T11:51:06Z |
| format | Article |
| id | doaj.art-63df5d62ed314dfa8525b86c874c60b8 |
| institution | Directory Open Access Journal |
| issn | 2186-8662 2186-8662 |
| language | English |
| last_indexed | 2024-12-12T11:51:06Z |
| publishDate | 2013-03-01 |
| publisher | International Society for Development and Sustainability (ISDS) |
| record_format | Article |
| series | International Journal of Development and Sustainability |
| spelling | doaj.art-63df5d62ed314dfa8525b86c874c60b82022-12-22T00:25:19ZengInternational Society for Development and Sustainability (ISDS)International Journal of Development and Sustainability2186-86622186-86622013-03-0121306332Analysis of sedimentation of canalsAgunwamba, J.C., Dike, C.C.Ogarekpe, N.M. Dike, B.UThe dredged canals in the Niger Delta coastal flood plain are being threatened by siltation. This study is limited to those canals in Rivers State of Nigeria, which are under the influence of tidal waves. A total of eight canals were considered with four each from Ekulama and Cawthorne Channel. Different approaches were used to carry out this study, which includes field reconnaissance survey, hydrographic survey, soil sample analysis and collection of all available data and information. The typical bed materials size (D50) is approximately 0.01mm; which gives a settling velocity of 0.09mm/sec using stroke’s law. Hydrographic survey of the canals from 1992 to 1996 revealed an average siltation rate of 2.35m/yr. A regression equation was also derived which relates the cost of dredging to canal area, rate of siltation and average aggregation. A plot of canal centre profile; entrance, middle and end cross sections showing sediment distribution along the canal profile, shows that majority of the particles that form the sediment enter the canal from the rivers. The sedimentation is caused by the reduction in water current, which has average value of 0.0145m/sec. The bathyorographical check on the canals revealed that the sum of the two exterior angles of the canal with the river at the point of connection has to lie within 1800 + 50 for an effective flow that will minimize settlement of particles. In addition, the canals should be constructed to start and terminate on a moving water body, to avoid dead ends. A regression equation was determined which relates the cost of dredging to canal area, rate of siltation and average aggradations.http://isdsnet.com/ijds-v2n1-22.pdfSedimentationCanalsAnalysisRegressionSiltationBathymetry |
| spellingShingle | Agunwamba, J.C., Dike, C.C. Ogarekpe, N.M. Dike, B.U Analysis of sedimentation of canals International Journal of Development and Sustainability Sedimentation Canals Analysis Regression Siltation Bathymetry |
| title | Analysis of sedimentation of canals |
| title_full | Analysis of sedimentation of canals |
| title_fullStr | Analysis of sedimentation of canals |
| title_full_unstemmed | Analysis of sedimentation of canals |
| title_short | Analysis of sedimentation of canals |
| title_sort | analysis of sedimentation of canals |
| topic | Sedimentation Canals Analysis Regression Siltation Bathymetry |
| url | http://isdsnet.com/ijds-v2n1-22.pdf |
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