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Nitrate Loading Calculations (continued) <br />Notes: <br />1. Ave Monthly precip, for Liden, 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 runoff volume precip minus estimed runoffvolume. <br />4. Referenced Eto obtained from CIMIS Zone 12, Eastside Sacramento -San Joaquin Valley; Represents Value for lawns and other uniform turf areas. <br />5. Actual ET adjustment based on the site specific landscape/plant cover (fractional multiplier); see below for calculating "composite factor", 0.80 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 ETD 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 />b -Site Develan-t rnndirtnnc• <br />Land Condition Fractiona Plant product <br />I Total Factor• <br />Impervious Area 0.0016 <br />0.1 <br />-0.00 <br />rees, Shrubs Groundcovers 0.0084 <br />0.5 <br />0.00 <br />Lawn (Cool Season) 0.99 <br />0.8 <br />0,79 <br />Herbaciuos Perrenials 0 <br />0.5 <br />0.00 <br />Composite 1 <br />GeWA Tufpass 1.3svns. cpol-seawn ,tai <br />0.80 <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, tudgrasses, <br />and garden aops to provide acceptable pedormance in California. <br />PluntType <br />Plant Factor <br />Tree, 9uubs. vines, Gro overs <br />as <br />(woad} plants) <br />Hefiamw Perann!.ais <br />0.5 <br />Deie A13PleJPL3nt5 <br />0.3 <br />Arujk6ers&ledclnoPlants <br />0.8 <br />GeWA Tufpass 1.3svns. cpol-seawn ,tai <br />09:.a <br />fwxKy. b`ue�ass. rie, bent; <br />General Tudgrass Lairs, n ann-5e350n <br />0.6 t 3 <br />be mu9a. tcrW, sL auguethe, 0311c' <br />KcmeFruit Crops. 0erduaus <br />0.82 <br />Nome Rtr Craps. De green <br />1.0 <br />Home t'e",e Paps <br />1.01 <br />PF of Aepianmg is that crlhtpknitgpe <br />Mi�eC Piantr. ys <br />rcstat atih the htghbiFF <br />