Laserfiche WebLink
B520 - Peak Irrigation Demand Basis of Design.xlsx <br /> File Location: W:\6520\Engineering\Modeling\2020-09 NPW River Islands Model\Calcs and Docs\Basis of Design for Model\ <br /> PACE Project No: B520 DATE 11/24/2020 <br /> Calculation By: Thomas Daniel Mihara EIT <br /> Water Balance Using Average Year Precipitation and Reference Eto Values from CIMIS Station 70 1987-2013 <br /> Parks and School Peak Irrigation Demand - Spray Irrigation <br /> Irrigation Efficiency 75% Per River Islands <br /> Leaching Requirement 10% Required by the City's Stanidards (January 2019) <br /> Reference <br /> Evapotranspiration Turf <br /> Precipitation Average ETo Turf Evapotranspiration <br /> Year Average Year Crop Coeffients ETC Irrigation Demand <br /> Month (in) (in) KC (in) (in) <br /> October 0.68 3.39 0.75 2.54 2.76 <br /> November 1.29 1.66 0.69 1.14 0.00 <br /> December 2.05 1.01 0.60 0.61 0.00 <br /> January 2.75 1.06 0.61 0.64 0.00 <br /> February 2.18 1.86 0.64 1.19 0.00 <br /> March 1.76 3.53 0.75 2.65 1.31 <br /> April 0.97 4.99 1.04 5.19 6.25 <br /> May 0.58 6.73 0.95 6.39 8.60 <br /> June 0.12 7.56 0.88 6.65 9.68 <br /> July 0.02 7.98 0.94 7.50 11.09 <br /> August 0.03 7.08 0.86 6.09 8.98 <br /> September 0.14 5.23 0.74 3.87 5.53 <br /> Total 12.571 52.071 1 44.471 54.20 <br /> Peak Month Irrigation Demand 11.09 inches per month <br /> Peak Month Irrigation Demand 301,067 gallons per month per Converting peak irrigation demand into gallons per month per acre <br /> acre <br /> Peak Month July <br /> Number of Days in Peak Month 31.00 days <br /> Peak Month Daily Irrigation Demand 9,712 GPD per acre Dividing the Peak Month Irrigation Demand by the number of days in July <br /> Irrigation Window per Day 8 hours per day Minimum irrigation window <br /> Peak Month Irrigation Demand Adjusted for <br /> the Irrigation Demand 29,136 GPD per acre Converting Peak Month Daily Irrigation Demand to be equivalent to an 8 hour irrigation window <br /> Page 1 of 2 PACE <br />