actual evapotranspiration

Water Balance - Rockford, IL
Field Capacity = 90 mm
	J	F	M	A	M	J	J	A	S	O	N	D	Year
P	50	49	66	78	100	106	88	84	86	73	56	45	881
PE	0	0	5	40	84	123	145	126	85	44	8	0	531
P-PE	50	49	61	38	26	-17	-57	-42	1	29	48	45	- -
DST	0	0	0	0	0	-17	-57	-16	1	29	48	12
ST	90	90	90	90	90	73	16	0	1	30	78	90
AE	0	0	5	40	84	123	145	100	85	44	8	0
D	0	0	0	0	0	0	0	26	0	0	0	0
S	50	49	61	38	26	0	0	0	0	0	0	33

Actual evapotranspiration (AE) in a soil water budget is the actual amount of water delivered to the atmosphere by evaporation and transpiration. In wet months, when precipitation exceeds potential evapotranspiration, actual evapotranspiration is equal to potential evapotranspiration (PE). In dry months, when potential evapotranspiration exceeds precipitation, actual evapotranspiration is equal to precipitation plus the absolute value of the change in soil moisture storage (DST).

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