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Nitrate Loadint, Calculations (continued) <br />Notes: <br />1. Ave Monthly precip. for Linden rain gauge <br />2. Estimated Average monthly runoff volume; zero assumed for this site with full on-site retention <br />3. "Available precip" equal to ave.monthly runoff volume precip minus estimed runoff volume. <br />4. Referenced potentional ETO obtained from CIMIS Zone 12, Linden rain gauge data <br />5. Actual ET adjustment based on the site specific landscape/plant cover (fractional multiplier); see <br />below for calculating "composite factor", 0.41 for this site. <br />6. Net rainfall recharge (" deep percolation") equal to Availbale precip (3) minus Actual ET (5); Negative <br />values set to zero. <br />Calculation of Composite of ETO Adjustment Factor <br />a. Key reference: University of Cali. Division of Agriculture and Natural Resources: Estimating Landscape <br />Water Requirements (Table 1) <br />b.Site Development Conditions: <br />Land Condition <br />Fractional <br />Total <br />Plant <br />Factor* <br />Product <br />Impervious Area <br />0.01 <br />0.1 <br />0.00 <br />Trees, Shrubs Groundcovers <br />0.97 <br />0.5 <br />0.49 <br />Lawn (Cool Season) <br />0.01 <br />0.8 <br />0.01 <br />Herbaciuos Perrenials <br />0.01 <br />0.5 <br />0.01 <br />Composite <br />1 <br />0.50 <br />*Per Table 1for applicable landscape categories, for impervious area <br />assume nominal 0.05 to 0.10 to account for evotranspiration of rainfall <br />retained on paved surfaces, gutters, etc. <br />Table 1. Plant Factors (PF) for established landscape plants, turfgrasses, <br />and garden crops to provide acceptable performance in Caiifornial. <br />Plant Type <br />Plant Factor <br />Tree. SY.r�ts vines, Grcurdccvers <br />';w Cody Plants) <br />r <br />Herba-eo'-1s Perennials <br />Desert Adarted Plants <br />_ <br />Annual Flower; S S ddinp Plants <br />= _ <br />General Tu fgrass La'v.rs. cool -season 'ta'i <br />fescue, 'n'y. bluegrass, rye, bent) <br />6 <br />General TurfCrass Lav;ns. warm-seasor <br />•.bermuda. zc,sia St. 4•ugustine. bufFaEc) <br />- - <br />Hume Fruit Crcr Ueciduceus <br />Home Fruit Crap°. E-:ergreer <br />Home Vegetable Crop_ <br />Mixed Planting; <br />>= cr Lite p_azYsg is that oftheplant type <br />rrseze e_et`. t,e;64hext PF <br />1 Values do not apply to any plant production operations, such as nurseries, greenhouses, <br />sod farms, or commercial farms. <br />Z Plant Factor shown is the annual average Kc value; monthly or seasonal Kc's may be available <br />if more precision is desired. <br />3 Plant Factor does not apply to sports fields, golf greens or tees. <br />4 From UC reference; note plant factors are annual average values; additional refinement may <br />be needed for seasonal crops. <br />