Table 5. Water budget summary for the North Unit, South Unit, and total for the Wood River Wetland, upper Klamath River basin, Oregon, October 2003–September 2005.

[Volumetric values rounded to the nearest 100 acre-feet. Minor adjustments were made to rates and percentages due to rounding to maintain consistency within the table. Feet of water per year: Values represent the annual amount of water gained or lost from the wetland due to a water-budget component as if that component were spread across the entire area of each wetland unit.]

	North Unit				South Unit				Total wetland
	Acre-feet	Feet of water per year	As percentage of total inflow		Acre-feet	Feet of water per year	As percentage of total inflow		Acre-feet	Feet of water per year	As percentage of total inflow
Inflows
Precipitation	4,100	1.28	39		3,100	1.31	49		7,200	1.29	43
Ground water:
Discharge from artesian wells	100	0.03	1		0	0.00	0		100	0.02	1
Seepage through dikes	300	0.09	3		400	0.17	6		700	0.13	4
Regional ground-water discharge	3,900	1.22	38		2,800	1.18	45		6,700	1.20	40
Total ground water	4,300	1.34	42		3,200	1.35	51		7,500	1.35	45
Irrigation inflow from Sevenmile Canal	2,000	0.62	19		0	0.00	0		2,000	0.36	12
Total inflow	10,400	3.24	100		6,300	2.66	100		16,700	3.00	100
Outflows
Pumpage	0	0.00	0	0	0.00	0	0	0.00	0
Evapotranspiration:
Open-water evaporation	6,500	2.03	63	6,500	2.74	103	13,000	2.33	78
Emergent vegetation evapotranspiration	4,900	1.53	47	2,500	1.05	40	7,400	1.33	44
Total evapotranspiraton	11,400	3.56	110	9,000	3.79	143	20,400	3.66	122
Total outflow	11,400	3.56	110	9,000	3.79	143	20,400	3.66	122
Change in storage (negative values indicate loss in storage)
Observed change in surface-water storage	0	0.00	0	-200	-0.08	-3	-200	-0.04	-1
Observed change in ground-water storage	-300	-0.09	-3	-100	-0.04	-2	-400	-0.07	-2
Total change in storage	-300	-0.09	-3	-300	-0.12	-5	-600	-0.11	-3
Water-budget residual1
Residual2	-700	-0.23	-7	-2,400	-1.01	-38	-3,100	-0.55	-19

¹ The residual incorporates errors associated with the measurement or estimation of all budget components as well as values of any unmeasured or unestimated budget components such as soil-moisture storage.

² Calculated as: Inflows - Outflows - Change in storage. Negative (-) values indicate a deficit of water due to errors in estimation or lack of inclusion of additional budget components resulting in one or more of the following conditions: inputs underestimated, outputs overestimated, and (or) change in storage overestimated.