Watershed scale rainfall interception on two forested watersheds in the Luquillo Mountains of Puerto Rico

TitleWatershed scale rainfall interception on two forested watersheds in the Luquillo Mountains of Puerto Rico
Publication TypeJournal Article
Year of Publication1990
AuthorsScantena, FN
JournalJournal of Hydrology
Volume113
Pagination89-102
Accession NumberLUQ.556
Keywordswatersheds
Abstract

Interception losses were monitored for one year and a related to vegetation characteristics in two forested watersheds in the Luquillo Experimental Forest of Puerto Rico. Total watershed interception was then molded by weighing values throughfall measured in representative areas of different vegetation types by the total watershed area of that vegetation group.
Annual canopy throughfall equaled 59% of annual rainfall whereas stemflow represented up to 2.3%. Canopy throughfall was greatest in gaps and along stream channels with 91% of total falling over 75% of the watershed area. However, 50% of the total stemflow came from less than 12% of the total stems.
Reported values of throughfall in the Tabonuco type forest of the Luquillo Moutains are typically 20 to 30% less than values reported for many montane and lowland tropical forests. These differences usually result from a high frequency, low intensity rainfall regime rather than the physiognomic character of the forest.

eda