The scientists studied the Geus Watershed in Guam for a year to understand its water flow and erosion. They found that stream levels, turbidity, and rainfall are closely linked in the watershed, showing it is very dynamic. By analyzing soil samples and using a computer model, they pinpointed areas with high erosion risk. They also created a way to estimate stream flow from water levels, which will help manage the watershed better in the future. This study will guide future efforts to protect and manage the Geus Watershed effectively.