Flood Control Project, Hoosic River, Adams, Massachusetts: Report No. 1: Model Investigation of Phase 1 of Improvement Works
Abstract
Model investigations of the Hoosic River at Adams, Massachusetts, were conducted to verify the hydraulic design and to determine what changes, if any, should be made for safety, for greater hydraulic efficiency, or for economy. Particular attention vas given to the flow conditions around the superelevated curves, in the stilling basins, and at the junctions of the culvert flume with Tophet Brook, and Tophet Brook with the Hoosic River. A 1:20-scale model reproduced approximately 2800 ft of the main channel of the Hoosic River and about 1300 ft of the lower portion of Tophet Brook. Flow conditions around curves were satisfactory as was the distribution of flow at the entrance to the drop structure on the main channel. However, for reasons of economy the stilling basin was moved downstream approximately 500 ft and the width of the channel upstream from the stilling basin narrowed from 75 to 40 ft. The removal of baffle piers from the stilling basin improved flow conditions, especially at capacity discharge of 13,000 cfs. Flow conditione at the original junction of the main channel of the Hoosic River and Tophet Brook were unsatisfactory. However, a change in radius of curvature of the right wall alignment effected the desired improvement. The angle of intersection at the junction of the culvert flume and Tophet Brook as originally designed was such that transverse waves were set up in the channel below the junction. These waves were carried into the drop structure downstream in Tophet Brook and caused the flow to be confined to the left side of the bas:ln with an eddy on the right side. A change in radius of curvature of the right wall alignment of the culvert flume improved flow conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1952
- Accession Number
- ADA637730