A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Spillway and Stilling Basin John Day Dam, Columbia River, Oregon and Washington. Hydraulic Model Investigation
Two sectional models were used to check performance of the proposed spillway for John Day Dam and to develop improvements if necessary. A three-bay section of the 20-bay spillway was studied in a 1:41.14-scale model. A two-bay section of the 17 low bays to be used during second-step construction was reproduced in a 1:24-scale model. Modifications of the crest piers to reduce the danger of cavitation during unusually large spillway flows were recommended. Discharge ratings in the three-bay model indicated that capacity of the spillway was slightly greater than computed for the design flow of 2,250,000 cfs. A 185-ft-long stilling basin at elev 114 performed as well as a 210-ft-long basin at elev 118. Three 10-ft-high baffle piers produced desired flow conditions in bay 2 of the stilling basin.
Spillway and Stilling Basin John Day Dam, Columbia River, Oregon and Washington. Hydraulic Model Investigation
Two sectional models were used to check performance of the proposed spillway for John Day Dam and to develop improvements if necessary. A three-bay section of the 20-bay spillway was studied in a 1:41.14-scale model. A two-bay section of the 17 low bays to be used during second-step construction was reproduced in a 1:24-scale model. Modifications of the crest piers to reduce the danger of cavitation during unusually large spillway flows were recommended. Discharge ratings in the three-bay model indicated that capacity of the spillway was slightly greater than computed for the design flow of 2,250,000 cfs. A 185-ft-long stilling basin at elev 114 performed as well as a 210-ft-long basin at elev 118. Three 10-ft-high baffle piers produced desired flow conditions in bay 2 of the stilling basin.
Spillway and Stilling Basin John Day Dam, Columbia River, Oregon and Washington. Hydraulic Model Investigation
L. Z. Perkins (author)
1974
111 pages
Report
No indication
English