MIT Libraries homeMIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Libraries
  • MIT Theses
  • Theses - Dept. of Civil and Environmental Engineering
  • Civil and Environmental Engineering - Master's degree
  • View Item
  • DSpace@MIT Home
  • MIT Libraries
  • MIT Theses
  • Theses - Dept. of Civil and Environmental Engineering
  • Civil and Environmental Engineering - Master's degree
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

The use of turbulent jets to destratify the Charles River Basin

Author(s)
Church, Jeffrey H. (Jeffrey Harrison)
Thumbnail
DownloadFull printable version (7.868Mb)
Other Contributors
Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering.
Advisor
Eric Adams.
Terms of use
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
Metadata
Show full item record
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.
Description
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).
 
Date issued
2012
URI
http://hdl.handle.net/1721.1/73794
Department
Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering.
Publisher
Massachusetts Institute of Technology
Keywords
Civil and Environmental Engineering.

Collections
  • Civil and Environmental Engineering - Master's degree
  • Civil and Environmental Engineering - Master's degree

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries homeMIT Libraries logo

Find us on

Twitter Facebook Instagram YouTube RSS

MIT Libraries navigation

SearchHours & locationsBorrow & requestResearch supportAbout us
PrivacyPermissionsAccessibility
MIT
Massachusetts Institute of Technology
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.