MINIMUM INSTREAM FLOW ESTIMATION AT UNGAGED STREAM SITES IN PUERTO RICO

Abstract: 
Minimum streamflow information is commonly used to determine the water available for extraction and to analyze instream environmental parameters. Minimum streamflow estimates are frequently desired at ungaged locations, either on a stream having gages at other locations, or a stream without any gages. This study presents regional regression equations to estimate minimum streamflow using two parameters: watershed area and mean annual rainfall. These equations are based on a revised rainfall map which incorporates the available rainfall data from 127 raingage stations and also considers geographic parameters.