Laserfiche WebLink
Nitrate Loading Calculations (continued) <br />Notes: <br />Ave Monthly precip. for Lodi, Western Regional Climate Center <br />Estimated Average monthly runoff volume; zero assumed for this site with full on-site retention of rainfall level site. <br />"Available precip" equal to ave.monthly runoff volume precip minus estimed runoff volume. <br />Referenced Eto obtained from CIMIS Zone 12, Eastside Sacramento-San Joaquin Valley; Represents Value for lawns and other uniform turf areas. <br />Actual ET adjustment based on the site specific landscape/plant cover (fractional multiplier); see below for calculating "composite factor", 0.55 for this site. <br />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 Fractional <br />Total <br />Plant <br />Factor* Product <br />Impervious Area 0.35 0.1 0.04 <br />Trees, Shrubs Groundcovers 0.62 0.5 0.31 <br />Lawn (Cool Season) 0.03 0.8 0.02 <br />Herbaciuos Perrenials 0 0.5 0.00 <br />Composite 1 0.37 <br />*Per Table lfor 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 Faders (PF) for established landscape plants, turigrasses, <br />and garden crops to provide acceptable perfo nuance In Califond.r. <br />Plant Type Plant Factor <br />Tree, Shrubs, Vlees, Groundcovers <br />(wood, Plants; <br />0.5 <br />Herbaceous oarennias 3.5 <br />Desert Adapted Plants 3.3 <br />Annual Flowers 8 Bedding Plants 0.8 <br />Gene-al Wanes Lawns. cool-season itot <br />fescue, Icy. bluegrass. nee bent) <br />General Theresa Lawns. wartn-seasoe <br />!berrn.da. sass.. St. August., break) <br />Home Fruit Crops Deod.ous 5.10 <br />Horne Frac Crops, Evergreen 1.0 <br />Home Vegetalne Crops 1 0 2 <br />staed nisnDogs PFof the plenegg I, that ofMr ;Art! We <br />prwervith de 14Aut PT <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.