Information server for southern Guam natural resources
Southern Guam watersheds
All surface and groundwater in Guam discharges into the Pacific Ocean. Of Guam’s 100 named streams and rivers, 46 drain directly into the ocean. This means that southern Guam has many small drainage basins, which can be grouped into fourteen large watersheds. The main topographic feature that defines many of the watersheds is a mountain ridge running along the western coast. It divides southern Guam watersheds into small and steep areas with short streams in the west, and broader floodplains and longer, larger rivers in the east.
Protecting southern Guam watersheds from point and non-point sources of pollution requires a better understanding of watershed topography, vegetation, soil properties, roads, land cover information, badlands, and many other features. One of the rationales behind this website is to serve such information to any interested parties.
Use menu on the right to view relevant maps.