Report Number: 40
Year: 1983

Hydrogeologic Investigation of Agana Swamp, Northern Guam

An attempt was made to investigate the hydraulic relationship between Agana Swamp, located near the village of Agana, and the freshwater lens beneath the limestone plateau of northern Guam. A number of problems developed during the course of the study which prompted a change in the project objectives. The main problems were access to the study area and artificial features which prevented the full application of geophysical surveys and the installation of an observation well network.

The study, however, points out a number of aspects such as the general geology and physiography of the swamp area, its drainage characteristics, and the occurrence of groundwater. In addition, the results of the investigation have been useful in constructing a set of guidelines for further study.

Jerry F. Ayers
Russell N. Clayshulte