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Washburne/RupprechtHWR203 The University of Arizona
What clues do we have to guide us besides riverbeds?
Washburne/RupprechtHWR203 The University of Arizona
1) Identify outlet/gauge point
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
2) Identify river valleys - lows
“V”’s pointing up hill
river
Washburne/RupprechtHWR203 The University of Arizona
3) Identify drainage divide - highs
“V”’s pointing down hill
Drainage divide
Washburne/RupprechtHWR203 The University of Arizona
4) Identify lower tributaries
“V”’s pointing up hill
river
Washburne/RupprechtHWR203 The University of Arizona
5) Continue tracing drainage divide
“V”’s pointing down hill
Drainage divide
Washburne/RupprechtHWR203 The University of Arizona
6) Move downhill from ridge to gauge
“V”’s pointing down hill
Drainage divide
Washburne/RupprechtHWR203 The University of Arizona
Outlining Watersheds - Summary
• Identify gauge point – lowest area
• Identify river valleys – low areas
• Identify drainage divides lines – high areas
• Identify lower tributaries for clarification
• Continue tracing drainage divide
• Move downhill from ridge to gauge
• Watershed boundaries will only cross the stream at one point (lowest elevation)
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/
Washburne/RupprechtHWR203 The University of Arizona
Watershed Example 1
Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/