The use of turbulent jets to destratify the Charles River Basin
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2012
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| Online Access: | http://hdl.handle.net/1721.1/73794 |
| _version_ | 1826192781945602048 |
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| author | Church, Jeffrey H. (Jeffrey Harrison) |
| author2 | Eric Adams. |
| author_facet | Eric Adams. Church, Jeffrey H. (Jeffrey Harrison) |
| author_sort | Church, Jeffrey H. (Jeffrey Harrison) |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012. |
| first_indexed | 2024-09-23T09:29:06Z |
| format | Thesis |
| id | mit-1721.1/73794 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T09:29:06Z |
| publishDate | 2012 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/737942019-04-10T15:48:51Z The use of turbulent jets to destratify the Charles River Basin Church, Jeffrey H. (Jeffrey Harrison) Eric Adams. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Civil and Environmental Engineering. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012. Page 74 blank. Cataloged from PDF version of thesis. Includes bibliographical references (p. 72-73). This study examines the feasibility of using turbulent jets to destratify the Lower Charles River Basin between the Longfellow and Craigie Bridges between Boston and Cambridge. The basin is currently filled with salt water that intrudes from the downstream dam and the resulting vertical density gradients inhibit mixing, leading to low levels of dissolved oxygen at depth. A physical model was scaled to a portion of this basin and salt water was used to create initial density profiles. Turbulent jets were introduced near the bottom at varying flow rates, discharge angles, and nozzle diameters, and a conductivity probe was used to document changes in salinity versus elevation and time. The effectiveness of the turbulent mixing was determined by comparing the change in water column potential energy over time, while efficiency was determined by comparing the change in potential energy versus the cumulative input of kinetic energy. The most effective arrangement provided a scaled mixing time of about a week to mix the basin. Since this is significantly shorter than the (annual) period over which stratification takes place, it is concluded that the turbulent jets would be an effective method to destratify the basin. by Jeffrey H. Church. S.M. 2012-10-10T15:45:57Z 2012-10-10T15:45:57Z 2012 2012 Thesis http://hdl.handle.net/1721.1/73794 810458682 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 74 p. application/pdf n-us-ma Massachusetts Institute of Technology |
| spellingShingle | Civil and Environmental Engineering. Church, Jeffrey H. (Jeffrey Harrison) The use of turbulent jets to destratify the Charles River Basin |
| title | The use of turbulent jets to destratify the Charles River Basin |
| title_full | The use of turbulent jets to destratify the Charles River Basin |
| title_fullStr | The use of turbulent jets to destratify the Charles River Basin |
| title_full_unstemmed | The use of turbulent jets to destratify the Charles River Basin |
| title_short | The use of turbulent jets to destratify the Charles River Basin |
| title_sort | use of turbulent jets to destratify the charles river basin |
| topic | Civil and Environmental Engineering. |
| url | http://hdl.handle.net/1721.1/73794 |
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