Sedimentation survey of Lago Yahuecas, Puerto Rico, March 1997

Water-Resources Investigations Report 98-4259
Prepared in cooperation with the Puerto Rico Electric Company and Power Authority
By: , and 



Sediment is filling Lago Yahuecas, a reservoir built to divert water to Lago Guayo for power generation, at an average rate of 2 percent per year. During March 10 to 13, 1997, the U.S. Geological Survey conducted a bathymetric survey of Lago Yahuecas to determine the amount of sediment deposited and sedimentation rate in the reservoir. Also, reservoir sediments were cored and sampled to determine the dry bulk density. Over the last 41 years, the storage capacity of the reservoir has been reduced by approximately 81 percent from 1.76 million cubic meters in 1956 to 0.33 million cubic meters in 1997. The average annual storage capacity loss to sediment deposition in the reservoir us 34,878 cubic meters per year. The average dry bulk density of the sediment samples was 0.98 gram per cubic centimeter. Based on the contributing drainage area of 45.17 square kilometers, the average sediment yield of the basin was estimated to be 757 megagrams per square kilometer per year.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Sedimentation survey of Lago Yahuecas, Puerto Rico, March 1997
Series title Water-Resources Investigations Report
Series number 98-4259
DOI 10.3133/wri984259
Edition -
Year Published 1999
Language English
Publisher U.S. Geological Survey
Publisher location Denver, CO
Description Report: v, 15 p.; Plate 1: 17.70 x 18.77 inches; Plate 2: 17.65 x 18.77 inches
Country United States
Other Geospatial Lago Yahuecas;Puerto Rico
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