Final Project From USGS Hydrologic Atlas online
Playa Recharge Conceptual Model of the flow system
Layer 3 – variable bottom Layer 2 Layer 1 50 ft gap represents confining bed Layers Datum The problem of dry cells and re-saturation
from GWV Layer 1 = type 1 Layer 2, 3 = type 3
Leakance between layers where each Layer belongs to a different hydrogeologic unit See A&W, p. 81 Layer 1 leakance
Leakance “Quasi 3D” model See A&W, p. 81 Layer 2 leakance
from GWV
Playa Recharge Conceptual Model of the flow system
h Q ET = R ETM x y [h - (h s -d)] / d ET d hshs extinction depth R ETM is the maximum ET rate, which occurs when h = h s. for h h s -d and h < h s
Q ET = 0 below the extinction depth. Q ET = Q ETM at the land surface.
Calibration Targets calibration value associated error m 0.80 m Target with relatively large associated error. Target with smaller associated error.