Laserfiche WebLink
Nitrate Loading Cukuhitions (continue(l) <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 Eta 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 forthis 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 ETC 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 <br />Fractiona <br />I Total <br />Plant <br />Factor` <br />Product <br />Impervious Area <br />0 <br />0.1 <br />0.10 <br />rees, Shrubs Groundcovers <br />0 <br />0.5 <br />0.00 <br />Lawn (Cool Season) <br />1 <br />0.8 <br />0.80 <br />Herbaciuos Perrenials <br />0 <br />0.5 <br />0.00 <br />Compositel <br />1 I <br />1 <br />0.90 <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 California', <br />Plant Type <br />Plant Factor <br />Tree, Shnibs, Vines. Groundco,. rF <br />0.5 <br />;voodj plants',. <br />Herbaceous Perenn ais <br />0.4 <br />Des -,-rt Adapted Plants <br />0.3 <br />knnu3l F3ovrers & Bedthrg %!ants <br />0.3 <br />GeneralTudgras3L3;71i,cool-season 'tall <br />3 <br />fEsiue, k'+, buegr353, rIE, bent; <br />General Turf;9-5, LaNni. n'arn,•:E35on <br />, <br />Omlud3. zc, m, St, AuguetinE. buff3!C <br />Home F-1 t Crops, <br />Ho rig Flit Crops, E;Ery-en <br />1:7 <br />Hcm- Vegetable Crcas <br />1.0 <br />PFof thtpiaalrguthto thepaa:type <br />�h+ed Flanbngs <br />re:entuath the htghestPF <br />' Values do not apply to any plant production operations, such as nurseries, greenhouses, sod farms, or commercial farms. <br />2 Plant Factor shown is the annual average Kc value: monthly or seasonal _Kc's_may be available if more precision is desired. <br />3 Plant Factor does not apply to sports fields, golf greens or tees. <br />From UC reference; note plant factors are annual average values; additional refinement may be needed for seasonal crops <br />