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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 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 />5. 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 />b.Site Development Conditions: <br />Land Condition Fractiona Plant product <br />I Total Factor' <br />Impervious Area <br />0.185 <br />0.1 <br />0.10 <br />Trees, Shrubs Groundcovers <br />0.25 <br />0.5 <br />0.13 <br />Lawn (Cool Season) <br />0.435 <br />0.8 <br />0.35 <br />Herbaciuos Perrenials <br />0.13 <br />0.5 <br />0.07 <br />Compositel <br />1 1 <br />1 <br />0.64 <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 crops to provide acceptable performance in Calffomial. <br />Plant Type <br />Plant Factor <br />Tree, Autbs. yinzs, U'roundm3a <br />GS <br />;+road`' plant�j <br />gebaceou Perennik <br />C'S <br />Dese t Adaoted Plate <br />4.3 <br />annual Smers b Beddurg Pi nts <br />g,b <br />Ge"Era! Tl;rfT' ii.awns, caokeaw int. <br />p 31 <br />feme, K,, biuem ;. re, bent' <br />Generzil7 aasL,;vns,warm-saaaen <br />a <br />;bemvda, m aa, R A.ugus^f;,de'. <br />ne. bu <br />Home Fret Croas, Dzodua,,a <br />Home FrI Creps. Evergreer. <br />1.^. <br />+arae 6'eget3bIe Craps <br />1z ` <br />Fq`thr� an> ag s t uq` ^e xatZ e <br />k+•ved panbn J; <br />tr71 with the t .hev?F <br />