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Nitrate: Loading Caiculati4l7,,S �ci�n#inttcti) <br />Notes: <br />1. Ave Monthly precip. for Uden, Western Regional Climate Center <br />2. Estimated Average monthly runoff volume; zero assumed for this site with full on-site retention of rainfall level site. <br />3. "Available precip" equal to ave.monthly runoffvolume precip minus estimed runoff volume. <br />4. Referenced Eto obtained from CIMIS Zone 12, Eastside Sacramento -San Joaquin Valley; Represents Value for lawns and other uniform turf areas. <br />S. Actual ET adjustment based on the site specific landscape/plant cover (fractional multiplier); see below for calculating "composite factor", 0.83 for this site. <br />6. Net rainfall recharge (" deep percolation") equal to Availbale precip (3) minus Actual ET (5); Negative values set to zero. <br />Calculation of Composite of ETO Adjustment Factor for Hypothetical Residential Lot <br />a. Key reference: University of Cali. Division of Agriculture and Natural Resources: Estimating Landscape Water Requirements (Table 1) <br />bSitp n—Plnn—t rnnrlifrn..e- <br />Land Condition Fractiona Plant product <br />I Total Factor' <br />Impervious Area <br />0.072 <br />0.1 <br />0.10 <br />Trees, Shrubs Groundcovers <br />0.028 <br />0.5 <br />0.01 <br />Lawn (Cool Season) <br />0.9 <br />0.8 <br />0.72 <br />Herbaciuos Perrenials <br />0 <br />0.5 <br />0.00 <br />Composite <br />1 <br />0.83 <br />categories for impervious area assume <br />nominal 0.05 to 0.10 to account for <br />evotranspiration of rainfall retained on paved <br />Table 1, Plant Factors (PF) for established landscape plants, tarfgrasses, <br />and garden crops to provide acceptable performance In California'. <br />Plant Type <br />Plant Factor <br />Tree. 5hr bs. Wes. Grourd:c+Ers <br />`S <br />;tY01d4' plarlti� <br />v.. <br />Herbaceous Perennials <br />C.5 <br />De=.ertAdapted Plants <br />0.3 <br />A,n Flcteaa&W6cgNms <br />�? <br />General Rr'grass Lavers. coa-seascn ;taf <br />ferue,hl bh:'yY r'1 <br />e ass, rye,bE. u; <br />b' 2 > <br />Gererai Turf;ass Lawn . Warm-seasol <br />,benrida, zo, s:a. St. Augusiee. Vlal t <br />H nEritCraas,DECIX'i <br />i z <br />C xs, tle�green <br />:� <br />HGRE %gE'Ple raps <br />t,J' <br />at J:.tf f �i :C' J 3 m.f <br />�': eE,7 P:antmg; <br />'m.e .St Ih!tj�l:t?f <br />