Quantcast Figure 1.1.3. Water Budget for the Lumped Parameter GWLF Stream Flow Model. (after Haith and Shoemaker, 1987)

 
  
 
Figure 1.1.3. Water Budget for the Lumped Parameter GWLF Stream Flow Model.
(after Haith and Shoemaker, 1987)
The daily unsaturated zone and shallow saturated zone water budget for day t, in moisture units of
centimeters (cm) is:
Ut+1 = Ut + Rt + Mt - Qt - Et - Pct
(1.1.7)
St+1 = St + PCt - Gt - Dt
(1.1.8)
Where:
Ut+1 = unsaturated zone soil moisture
St+1 = shallow saturated zone soil moisture
Rt = rainfall
Mt = snowmelt
Qt = watershed runoff Qkt (for all k)
Et = evapotranspiration
Pct = percolation into the shallow saturated zone
Gt = ground water flow or discharge into the stream
Dt = deep seepage flow to the deep saturated zone
1.1-9

 


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