Advanced Search
DSpace@MIT

The use of turbulent jets to destratify the Charles River Basin

Research and Teaching Output of the MIT Community

Show simple item record

dc.contributor.advisor Eric Adams. en_US
dc.contributor.author Church, Jeffrey H. (Jeffrey Harrison) en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. en_US
dc.coverage.spatial n-us-ma en_US
dc.date.accessioned 2012-10-10T15:45:57Z
dc.date.available 2012-10-10T15:45:57Z
dc.date.copyright 2012 en_US
dc.date.issued 2012 en_US
dc.identifier.uri http://hdl.handle.net/1721.1/73794
dc.description Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012. en_US
dc.description Page 74 blank. Cataloged from PDF version of thesis. en_US
dc.description Includes bibliographical references (p. 72-73). en_US
dc.description.abstract 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. en_US
dc.description.statementofresponsibility by Jeffrey H. Church. en_US
dc.format.extent 74 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights 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. en_US
dc.rights.uri http://dspace.mit.edu/handle/1721.1/7582 en_US
dc.subject Civil and Environmental Engineering. en_US
dc.title The use of turbulent jets to destratify the Charles River Basin en_US
dc.type Thesis en_US
dc.description.degree S.M. en_US
dc.contributor.department Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. en_US
dc.identifier.oclc 810458682 en_US


Files in this item

Name Size Format Description
810458682.pdf 7.868Mb PDF Preview, non-printable (open to all)
810458682-MIT.pdf 7.868Mb PDF Full printable version (MIT only)

This item appears in the following Collection(s)

Show simple item record

MIT-Mirage