Washburne/Rupprecht HWR203The University of Arizona What clues do we have to guide us besides riverbeds?

Washburne/RupprechtHWR203 The University of Arizona

What clues do we have to guide us besides riverbeds?


Contour Lines - Hill


Contour Lines - Valley


1) Identify outlet/gauge point

Maps: ©2000 by Stephen J. Reynolds and Julia K. Johnson; Web: geology.asu.edu/~reynolds/


2) Identify river valleys - lows

“V”’s pointing up hill

river


3) Identify drainage divide - highs

“V”’s pointing down hill

Drainage divide


4) Identify lower tributaries

“V”’s pointing up hill

river


5) Continue tracing drainage divide


Drainage divide


6) Move downhill from ridge to gauge


Drainage divide


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)


Watershed Example 1



Watershed Example 1



Watershed Example 1



Watershed Example 1



Watershed Example 1



Watershed Example 1



Example 2


Example 2


Example 3


Example 3

Washburne/Rupprecht HWR203The University of Arizona What clues do we have to guide us besides riverbeds?

Documents

reynolds slide

hill river slide

johnson web

hill drainage

point lowest elevation

tracing drainage divide

drainage divide highs

watershed boundaries