1. Water Balance Components

3. DBHydro State Plane Coordinates High Accuracy Reference Network (HARN)
Refinement of NAD83

4. DBHydro Rainfall Stations
Approximately 600 stations

5. Spatial Distribution of Average Rainfall

6. Voronoi/Thiessen Polygons

7. Evaporation Pan
historic/nws/wea01170.htm

8. Pan Evaporation Pan Coefficients: 0.58 – 0.78 (get hotter than lake)
Transpiration
Potential Evapotranspiration (water may not be in soil)
Thornwaite Equation

9. Watersheds

10. Watersheds

11. Stage

12. Stage Recorder

13. Stream Gauging Measure velocity at 2/10 and 8/10 depth Q = v*A
Rating curve:
Q vs. Stage

14. River Hydrograph

16. Recurrence Interval T = n+1 /m P = 1/T
T: recurrence interval
n: number of data
m: rank (highest to lowest)
P = 1/T

17. Well Hydrograph

18. http://www. prescottcreeks

20. Textbook Errata