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Example Water Balance-Recharge Analysis-Lodi,California <br /> 1 2 3 4 5 6 <br /> Month Ave Precip. Average Runoff Available Precip. Potential ETo Actual ET Net Rainfall <br /> (in/month) Volume (in/month) (in/month) (in/month)* Recharge <br /> (fraction) (in/month) <br /> Ian 2.66 0.00 2.66 0.98 0.57 2.09 <br /> Feb 3.00 0.00 3.00 1.68 0.97 2.03 <br /> Mar 2.31 0.00 2.31 3.37 1.95 0.36 <br /> Apr 1.26 0.00 1.26 5.08 2.95 0.00 <br /> May 0.64 0.00 0.64 6.67 3.87 0.00 <br /> Jun 0.12 0.00 0.12 7.51 4.36 0.00 <br /> Jul 0.01 0.00 0.01 7.74 4.49 0.00 <br /> Aug 0.02 0.00 0.02 6.80 3.94 0.00 <br /> Sep 0.14 0.00 0.14 5.01 2.91 0.00 <br /> Oct 1.38 0.00 1.38 3.25 1.89 0.00 <br /> Nov 1.71 0.00 1.71 1.50 0.87 0.84 <br /> Dec 2.18 0.00 2.18 0.90 0.52 1.66 <br /> Total 15.43 15.43 50.49 29.28 6.97 <br /> =Eto x adjustment factor of 0.58 for hypothetical mix of vegetation and landscape conditions per below <br /> Example Calculation of"Composite"Eto Adjustment Factor for Hypothetical Residential Lot Table 1. Plant Factors(PF)for established landscape plants,turfgrasses,and <br /> garden crops to provide acceptable performance in California'. <br /> a.Key reference:University of Calif.Division of Agriculture and Natural Resources:Estimating Landscape Water Requirements(Table 1) Plant Type Plant Factor <br /> https://ucanr.edu/sites/UrbanHort/Water Use of Turfgrass and Landscape Plant Materials/SLIDE Simplified Irrigation Demand Estimation/ Tree,Shrubs,Vines,Groundcovers 0.5 <br /> (woody plants) <br /> b.Approximate Site Development Conditions: Herbaceous Perennials 0.5 <br /> Land Condition Fraction of Total Plant Factor* Product Desert Adapted Plants 0.3 <br /> Impervious Area 0.20 0.1 0.02 Annual Flowers&Bedding Plants 0.8 <br /> Trees,Shrubs Groundcovers 0.40 0.5 0.2 General Turfgrass Lawns,cool-season(tall fescue,Ky. 0.8 <br /> bluegrass, a bent <br /> Turfgrass,cool-season 0.20 0.8 0.16 General Turfgrass Lawns,warm-season (bermuda,zoysia,St, 0.6 <br /> Augustine,buffalo <br /> Home Fruit Crops,Evergreen 0.20 1.0 0.2 Home Fruit Crops,Deciduous 0.8 <br /> Composite 1.00 0.58 Home Fruit Crops,Evergreen 1.0 <br /> *Per Table 1 for applicable landscape categories;for impervious areas assume nominal 0.05 to 0.10 <br /> to account for evaporation of rainfall retained on paved surfaces,gutters,puddles,etc. <br /> Home Vegetable Crops 1.0 <br /> 1.From UC reference;note Plant Factors are annual average values;additional <br /> refinement may be needed for seasonal crops <br />