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Table A1.1. Evaporative Loss / Net Water Loss Worksheet <br />Area of Exposed Groundwater. 13.0 acres <br />(1) (2) (3) (4) (5) (6) m (e) (9) (10) <br />Gross Free Free Water Total Net <br />Monthly Surface Monthly Surface Gross Effective Effective Total Net Lagged <br />Fraction of Evaporation Evaporation Area Evaporation Mean Rainfall Precipitation Precipitation Evaporation Evaporation <br />Month <br />Evaporation <br />[ft] <br />IN <br />[acre] <br />[acre -ft] <br />Fin] <br />[in] <br />[acre-ft] <br />facre -ft] <br />acre -ft <br />Jan <br />0.03 <br />3.25 <br />0.10 <br />0.00 <br />0.00 <br />0.36 <br />0.25 <br />0.00 <br />0.00 <br />0.75 <br />Feb <br />0.04 <br />3.25 <br />0.11 <br />0.00 <br />0.00 <br />0.48 <br />0.34 <br />0.00 <br />0.00 <br />0.43 <br />Mar <br />0.06 <br />3.25 <br />0.18 <br />13.00 <br />2.32 <br />1.20 <br />0.84 <br />0.91 <br />1.41 <br />0.75 <br />Apr <br />0.09 <br />3.25 <br />0.29 <br />13.00 <br />3.80 <br />1.98 <br />1.39 <br />1.50 <br />230 <br />1.41 <br />May <br />0.12 <br />3.25 <br />0.39 <br />13.00 <br />5.07 <br />2.72 <br />1.90 <br />2.06 <br />3.01 <br />2.08 <br />June <br />0.15 <br />325 <br />0.47 <br />13.00 <br />6.13 <br />1.83 <br />1.28 <br />1.39 <br />4.74 <br />3.12 <br />Jut <br />0.15 <br />3.25 <br />0.49 <br />13.00 <br />6.34 <br />1.60 <br />1.12 <br />1.21 <br />5.12 <br />4.03 <br />Aug <br />0.14 <br />325 <br />0.44 <br />13.00 <br />5.70 <br />1.44 <br />1.01 <br />1.09 <br />4.61 <br />4.33 <br />Sep <br />0.10 <br />3.25 <br />0.33 <br />13.00 <br />4.23 <br />1.30 <br />0.91 <br />0.99 <br />124 <br />3.94 <br />Oct <br />0.07 <br />3.25 <br />0.23 <br />- 13.00 <br />2.96 <br />1_13 <br />0.79 <br />0.86 <br />2.10 <br />3.18 <br />Nov <br />0.04 <br />3.25 <br />0.13 <br />13.00 <br />1.69 <br />0.59 <br />0.41 <br />0.45 <br />1.24 <br />2.36 <br />Dec <br />0.03 <br />3.25 <br />0.10 <br />0.00 <br />0.00 <br />0.49 <br />0.34 <br />0.00 <br />0.00 <br />1.40 <br />totals <br />3.25 <br />38.24 <br />15.12 <br />10.58 <br />10.46 <br />27.78 <br />27.78 <br />Notes: <br />(1) = Monthly fraction of evaporation for elevations below 6500 ft from Guidelines <br />for Substitute Water Supply Plans_ <br />(2) = Gross free water surface evaporation from NOAA Technical Report NWS 33 <br />(3) = Columns (1) x (2) <br />(4) = Total free water surface area -13.0 ac. Assumes ice cover for Dec -Feb <br />(5) = Columns (3) x (4) <br />(6) = Mean Rainfall (1948-2000) at Longmont, from Table A1.6 <br />(7) = Effective Rainfall = Column (6)• 0.7 <br />(8) = Column (7) " (1/12)` Column (4) <br />(9) = Column (5) - Column (8) <br />(10) = IDS AWAS Steady State Lagged Depletion Output from Table Ai.5 and Normalized to equal the total in Column (9) <br />