Geological Survey hydrologists measured changes in erosion along the stream channels affected by the May 18, 1980 eruption. These measurements were used to study the erosion processes and to estimate the severity of the sedimentation problem. The view here is along the Muddy River drainage, approximately one mile ( kilometers) southeast of the volcano's base. Rod person (lower left) and instrument persons (upper right) give scale.
Geological Survey hydrologists measured changes in erosion along the stream channels affected by the May 18, 1980 eruption. These measurements were used to study the erosion processes and to estimate the severity of the sedimentation problem. The view here is along the Muddy River drainage, approximately one mile ( kilometers) southeast of the volcano's base. Rod person (lower left) and instrument persons (upper right) give scale.
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