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Scientific Investigations Report 2009–5004

Hydrologic and Water-Quality Conditions During Restoration of the Wood River Wetland, Upper Klamath River Basin, Oregon, 2003–05

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.

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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