BRASS Modeling of Loíza Reservoir, Puerto Rico, for Sediment Management Operations

by Gregory L. Morris, Morris & Assoc, San Juan, United States,
Raul Colón, Morris & Assoc, San Juan, United States,
Robert Laura, Morris & Assoc, San Juan, United States,
G. T. Anderson, Morris & Assoc, San Juan, United States,

Document Type: Proceeding Paper

Part of: Water Resources Planning and Management: Saving a Threatened Resource—In Search of Solutions


Loiza reservoir, the principal water supply for metropolitan San Juan, delivers 3.5 m3/s (80 mgd) to the Sergio Cuevas filter plant. Sedimentation has reduced the capacity of the 25.3×106 m3 reservoir by 43% since construction in 1953. To limit future sediment accumulation, reservoir levels will be lowered during storms to route flood-borne sediments through the nearly-empty impoundment, and the pool will be refilled with runoff from the recession portion of the hydrograph.

Subject Headings: Hydrologic models | Reservoirs | Sediment | Flood routing | Runoff | Streamflow | Hydraulic models | Urban areas | Puerto Rico | United States | Caribbean

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