Suspended-sediment data in the upper Rio Grande De Loiza basin, Puerto Rico

Open-File Report 88-324



Fluvial sediment, a widely recognized pollutant of surface water , is reducing the efficiency and useful life of almost all reservoirs in Puerto Rico. Sediment transported from the upper basin of the Rio Grande de Loiza is eventually deposited in the bottom of Lago Loiza, a water reservoir. Suspended sediment data were collected from 1983 to 1986 from a 208 sq mi area extending from the headwaters of Rio Grande de Loiza to the Lago Loiza. The drainage areas range from 0.82 sq mi to 89.8 sq mi. Results are based on three years of data from a network of five daily- record stations and five partial-record stations. A total of 2 ,114 sediment samples were collected and analyzed during the investigation. Instantaneous concentrations of suspended sediment varied from 0 to 56, 100 mg/L. Instantaneous suspended sediment loads ranged from 0 tons/day to 817,000 tons/day. A total of 152 suspended sediment samples were analyzed for particle size distribution. Suspended sediment in the streams is composed mostly of silt and clay. Sand content ranged from 6 to 80% during high flows. (Author 's abstract)
Publication type Report
Publication Subtype USGS Numbered Series
Title Suspended-sediment data in the upper Rio Grande De Loiza basin, Puerto Rico
Series title Open-File Report
Series number 88-324
DOI 10.3133/ofr88324
Edition -
Year Published 1989
Language ENGLISH
Publisher U.S. Geological Survey ; Books and Open-File Reports [distributor],
Description v, 42 p. :ill., maps ;28 cm.
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