Sedimentation survey of Lago Toa Vaca, Puerto Rico, July 1985

Figueroa-Alamo, Carlos

doi:10.3133/ofr90199

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“…A sedimentation survey conducted by the USGS in 1985 indicated a reservoir volume of 62.44 million cubic meters compared to the 2002 volume of 64.08 million cubic meters (Figueroa-Alamo, 1991). This apparent increase in reservoir volume is unrealistic because no sediment removal activities were performed between 1985 and 2002.…”

Section: Storage Capacity and Sediment Accumulationmentioning

confidence: 99%

Sedimentation Survey of Lago Toa Vaca, Puerto Rico, June-July 2002

Soler-López¹

2004

Scientific Investigations Report

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The Lago Toa Vaca dam is located in the municipality of Villalba in southern Puerto Rico, and is owned and operated by the Puerto Rico Aqueduct and Sewer Authority. Construction was completed in 1972 as the first phase of a multipurpose project that contemplated four possible diversions from other basins to mitigate the rapid storage capacity loss of Lago Guayabal, located immediately downstream of the Toa Vaca dam. The latter phases of the intra-basin diversions were cancelled, and currently, the reservoir receives runoff from only 56.8 square kilometers of its drainage area. Lago Toa Vaca reservoir when constructed was to be used for irrigation of croplands in the southern coastal plain. The reservoir had an original storage capacity of 68.94 million cubic meters. Sedimentation has reduced the storage capacity by only 7 percent between 1972 and 2002 to 64.08 million cubic meters. This represents a long-term sedimentation rate of about 162,000 cubic meters per year. Based on the 2002 sedimentation survey, Lago Toa Vaca has a sediment trapping efficiency of about 98 percent and a drainage area-normalized sedimentation rate of about 3,086 cubic meters per square kilometer per year between 1972 and 2002. At the current long-term sedimentation rate the reservoir would lose its storage capacity by the year 2400.

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Section: Storage Capacity and Sediment Accumulationmentioning

confidence: 99%

Sedimentation Survey of Lago Toa Vaca, Puerto Rico, June-July 2002

Soler-López¹

2004

Scientific Investigations Report

View full text Add to dashboard Cite

show abstract

Sedimentation survey of Lago Toa Vaca, Puerto Rico, July 1985

Cited by 1 publication

References 1 publication

Sedimentation Survey of Lago Toa Vaca, Puerto Rico, June-July 2002

Sedimentation Survey of Lago Toa Vaca, Puerto Rico, June-July 2002

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