Theory 27/Seasons to Years/Groundwater
Recharge Needs Storm Frequency
The claim
Annual groundwater recharge is set by the ratio of storm frequency to evapotranspiration demand rather than by total rainfall.
01Mechanism
Only events large enough to exceed soil storage reach the aquifer; the ratio of such events to drying demand determines the annual total.
02Prediction
Recharge should track the ratio.
03Refutation
Recharge tracking rainfall total would remove demand.