Information server for southern Guam natural resources
Drainage in southern Guam
Most rainfall in volcanic areas of southern Guam enters directly to stream valleys. The island has about 100 streams, which range in length from less than 1 km to more than 5 km. They flow in deeply incised and V-shaped valleys in highland areas, or wide and flat-bottomed valleys in coastal lowlands, wherever the ground surface intersects the water table.
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