PROTECTION OF NARRAGAMSETT BAY FROM HURRICAM: TIDES 



Hydraulic Model Investigation 

 (interim Report) 



PART I: INTRODUCTION 

 Purposes of Investigation 



1. The principal purposes of the model investiga on of plans for 

 protection of Narragansett Bay from hurricane tides were to determine: 

 (a) the effects of barriers installed at various locations in the bay on 

 both hurricane and astronomical tide heights throughout the bay system^ 

 both landward and seaward from the various structures; (b) the magnitude 

 of the tidal current velocities that would obtain in the navigation open- 

 ings of certain of the barriers during both hurricane and astronomical 

 tides; and (c) the effects of the barriers on tidal current velocities 

 throughout the bay system for conditions of normal tides. Secondary 

 purposes of the model investigation included determination of the effects 

 of the barriers on salinities^ temperatures^ sedimentation, and flushing 

 throughout the bay system. 



Scope of This Report 



2. A total of 36 proposed improvement plans were tested in 

 the model during the course of the investigation; however, the more 

 complete testing was limited to those plans found to be most practical 

 as a result of partial model tests in combination with New England 

 Division design and economic studies. Plans subjected to more or less 

 complete testing include plans 27 through 36, and all pertinent data 

 obtained during model tests of these plans are presented in this re- 

 port. In addition, the results of several of the partial tests are 

 reported herein, since these results have a direct bearing on con- 

 clusions or subsequent test procedures. It is planned to publish a 



