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Forward Landfill <br />WATER BUDGET <br />HYDROLOGY <br />07/17/2014 <br />WAT ER BUDGET <br />Month OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP YEAR Notes <br />Average (Mean) Precipitation (Inches)0.74 1.80 2.23 2.92 2.27 2.15 1.17 0.41 0.09 0.03 0.04 0.30 14.14 (1) <br />Rainfall (Inches)1.20 2.93 3.63 4.75 3.70 3.50 1.90 0.67 0.14 0.05 0.07 0.49 23.03 (2) <br />Evaporation (Inches)3.93 1.7 0.74 0.72 1.58 3.87 5.97 8.47 10.95 10.82 9.56 6.6 64.91 (3) <br />Runoff Depth to Pond (Inches)0.37 1.75 2.39 3.44 2.45 2.27 0.88 0.09 0.01 0.04 0.03 0.03 13.76 (4) <br />Demand (Ac-Ft)6.11 2.64 1.15 1.12 2.46 6.01 9.28 13.16 17.02 16.82 14.86 10.26 100.9 (5) <br />Runoff Volume to Pond (Ac-Ft)1.22 5.71 7.78 11.20 7.98 7.40 2.88 0.29 0.05 0.14 0.11 0.09 44.8 (6) <br />Storage (Ac-Ft)0.00 3.07 6.63 10.08 5.52 1.39 0.00 0.00 0.00 0.00 0.00 0.00 10.1 (7) <br />Supply from Well (Ac-Ft)4.89 0.00 0.00 0.00 0.00 0.00 6.40 12.88 16.97 16.68 14.75 10.16 82.7 (8) <br />Total Area 39.1 Acres <br />Pond Area 1.8 Acres <br />Net Area 37.3 Acres <br />Compost Density 0.5 <br />Compost Area 18.7 Acres <br />Annual Runoff 44.8 AC-FT <br />Percent Seasonal Runoff 59.8% <br />Max Process Water Storage 10.1 AC-FT <br />Seasonal Runoff (Nov-Mar)40.1 AC-FT <br />Notes: <br />(1) California Department of Water Resources, Flood & Safety, Climate Data, Precipitaion, Monthly Historical Data, Stockton AP.July 2014 <br />(2) Distribute monthly using 25-year return period annual total precipitation value = 23.03 Inches and average precipitation. <br />(3) Western Regional Climate Center, Monthly Average Pan Evaporation, July 2014. <br />(4) Compute runoff from precipitation using SCS Curve Number Method for a CN = 88. <br />(6) Runoff volume to pond is the net site area times the runoff depth. <br />(7) Storage volume in pond is equal to the runoff volume minus the evaporation volume but not less than zero. The yearly value represents the maximum monthly storage required for the pond. <br />(8) Supply from well or other source is equal to the demand less the storage volume. <br />(5) Compute water demand for compost area assuming moisture in stock piles lost by evaporation must be replaced. Assume 50% of area is compost. Volume is equal to evaporation depth times the <br />compost area. <br />0.00 <br />2.00 <br />4.00 <br />6.00 <br />8.00 <br />10.00 <br />12.00 <br />14.00 <br />16.00 <br />18.00 <br />Demand (Ac-Ft) <br />Runoff Volume to Pond (Ac-Ft) <br />Storage (Ac-Ft) <br />Supply from Well (Ac-Ft) <br />0.00 <br />2.00 <br />4.00 <br />6.00 <br />8.00 <br />10.00 <br />12.00 <br />OCTNOVDECJANFEBMARAPRMAYJUNJULAUGSEPRainfall (Inches) <br />Evaporation (Inches) <br />Series3 <br />Hydrology WATER BUDGET Page 1 of 6