Jet-Forced Circulation in Water-Supply Reservoirs

by Rodney J. Sobey, Res. Engr.; Karlsruhe Univ., Karlsruhe, Germany,
Stuart B. Savage, Assoc. Prof.; Dept. of Civ. Engrg. and Appl. Mech., McGill Univ., Montreal, PQ, Canada,

Serial Information: Journal of the Hydraulics Division, 1974, Vol. 100, Issue 12, Pg. 1809-1828

Document Type: Journal Paper


A detailed understanding of the large-scale current motions in reservoirs is a fundamental prerequisite to their successful water quality management. A theoretical and experimental study of the throughflow-forced circulating flow within a reservoir gyre of simplified geometry is presented. Dimensional analysis and flow visualization are used to define the essential features of the flow. An integral-type mathematical model, containing no free parameters, is then presented and subsequently verified against laboratory experiments. This mathematical model is extrapolated to a real-reservoir parameter range to define a jet-forced circulation diagram. This diagram, which should be useful in the preliminary design of water-supply reservoirs, nondimensionally relates the jet-forced circulation to: (1) the reservoir aspect ratio and the boundary roughness; (2) the jet Reynolds number; and (3) the jet geometry having been shown to be relatively unimportant.

Subject Headings: Water circulation | Water supply | Reservoirs | Water quality | Quality control | Geometrics | Flow visualization | Mathematical models

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