M. A. Lopez E.V. Giusti 1967 <p><span>The presently available data on&nbsp;streamflow, runoff rainfall, and temperature of Puerto&nbsp;Rico&nbsp;are evaluated, although the period of record is very short, with a view to contributing to the knowledge of hydrology of tropical islands. The average annual&nbsp;streamflow&nbsp;in&nbsp;Puerto&nbsp;Rico&nbsp;is&nbsp;45 percent&nbsp;of the annual rainfall, or 15 percent more than in the eastern piedmont of the U.S. where it is 30 percent.&nbsp;Climate&nbsp;is assumed to be responsible for this difference as well as for the differences of the flows of&nbsp;Puerto Rican streams which vary from 15 to 85 percent of the annual rainfall. Variations in the&nbsp;climate&nbsp;of&nbsp;Puerto&nbsp;Rico are shown by Thornthwaite's climatic index on a map of the island, and the variations of the streamflow&nbsp;to rainfall ratios of&nbsp;Puerto&nbsp;Rican streams are shown to be related to Thornthwaite's climatic index.</span></p> application/pdf en University of Puerto Rico Climate and streamflow of Puerto Rico article