Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 42.89 8.90 76.90 61.20 03Mar2018 9 a.m. 47.43 12.20 66.73 241.50 03Mar2018 10 a.m. 53.24 11.90 57.05 426.40 03Mar2018 11 a.m. 58.28 15.10 50.56 576.30 03Mar2018 12 p.m. 63.57 14.80 46.34 673.50 03Mar2018 1 p.m. 67.50 14.70 43.07 713.30 03Mar2018 2 p.m. 69.84 16.00 42.59 689.00 03Mar2018 3 p.m. 70.48 18.10 44.37 602.90 03Mar2018 4 p.m. 70.59 17.30 43.60 462.50 03Mar2018 5 p.m. 69.42 14.70 44.43 250.90 03Mar2018 6 p.m. 67.32 14.90 46.05 84.30 03Mar2018 7 p.m. 57.94 14.00 62.84 0.00 03Mar2018 8 p.m. 60.69 11.00 54.76 0.00 03Mar2018 9 p.m. 59.09 11.90 56.47 0.00 03Mar2018 10 p.m. 59.20 14.50 54.51 0.00 03Mar2018 11 p.m. 58.17 14.10 55.17 0.00 04Mar2018 12 a.m. 56.21 11.60 58.77 0.00 04Mar2018 1 a.m. 53.51 12.00 64.40 0.00 04Mar2018 2 a.m. 52.03 10.10 64.87 0.00 04Mar2018 3 a.m. 50.90 10.10 65.25 0.00 04Mar2018 4 a.m. 49.89 11.30 65.61 0.00 04Mar2018 5 a.m. 49.01 11.70 64.72 0.00 04Mar2018 6 a.m. 47.91 10.90 64.32 0.00 04Mar2018 7 a.m. 48.00 10.90 63.86 0.00 Accuml. Values 1383.11 312.70 1357.24 4781.80 Num. Valid Values 24 24 24 24 Avg. Values 57.63 13.03 56.55 199.24 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 14.24 503.13 56.55 411.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4345 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.7706 definition: TdC = TAIR_avg - ((14.55 + (0.114*TAIR_avg))*xcompl +pow((2.5 + 0.007*TAIR_avg)*xcompl, 3) + (15.9 +0.117*TAIR_avg)*pow(xcompl, 14)) del_lambda1 = 0.6144 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3856 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.9760 definition: Qn = 0.00714*SRAD_avg + 0.00000526*SRAD_avg*pow(TAIR_avg+17.8, 1.87) +0.00000394*pow(SRAD_avg, 2) - 0.00000000239*pow(SRAD_avg, 2)*pow(TAIR_avg-7.2, 2) - 1.02 es_ea = 7.0370 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.4628 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.255 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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