Canal Capacity Studies; Concrete Sections, Main Canal (Long Lake Reach) Columbia Basin Project

摘要

Hydraulic tests were made on the concrete-lined sections of the Main Canal, Columbia Basin Project, Washington, in 1960, 1963, and 1964. Some of the data from the 1960 tests were analyzed and included in Bureau of Reclamation Technical Memorandum No. 661. All of these tests are summarized in this publication. The 4.5-mi test reach was designed for a flow of 9,700 cis on a slope of 0.0001. Design velocity was 5.77 fps, based on Nutter's 'N' of 0.014. The equivalent Manning's 'N' is 0.0146. Computed average values of Manning's 'N', based on test data, varied from about 0.014 in Mar ch to about 0.018 in August 1960. Estimated curve and pier losses were subtracted from measured losses for computing resistance coefficients. Tests conducted in 1963 and 1964 to determine effects of copper sulfate treatments on resistance caused by filamentous algae were not conclusive. (Author)