Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 47.75 12.00 64.44 32.80 04Mar2018 9 a.m. 51.17 12.50 58.36 72.60 04Mar2018 10 a.m. 54.36 13.90 55.63 178.00 04Mar2018 11 a.m. 58.48 14.50 52.30 470.70 04Mar2018 12 p.m. 62.55 15.10 49.97 541.20 04Mar2018 1 p.m. 65.30 16.70 50.40 599.70 04Mar2018 2 p.m. 66.85 16.50 49.95 544.50 04Mar2018 3 p.m. 67.48 16.70 50.49 297.20 04Mar2018 4 p.m. 66.85 14.60 50.97 175.60 04Mar2018 5 p.m. 63.61 14.70 53.29 87.50 04Mar2018 6 p.m. 60.31 12.70 57.56 9.20 04Mar2018 7 p.m. 49.89 18.00 22.99 2.00 04Mar2018 8 p.m. 55.69 14.10 71.60 0.00 04Mar2018 9 p.m. 54.46 13.80 75.63 0.00 04Mar2018 10 p.m. 52.93 11.00 87.04 0.00 04Mar2018 11 p.m. 53.65 12.80 84.57 0.00 05Mar2018 12 a.m. 52.92 12.90 95.04 0.00 05Mar2018 1 a.m. 52.07 12.70 100.41 0.00 05Mar2018 2 a.m. 52.18 12.80 100.41 0.00 05Mar2018 3 a.m. 52.95 10.80 100.41 0.00 05Mar2018 4 a.m. 55.08 7.50 100.41 0.00 05Mar2018 5 a.m. 55.45 12.60 96.65 0.00 05Mar2018 6 a.m. 44.56 29.50 80.80 0.00 05Mar2018 7 a.m. 43.05 30.60 77.22 0.00 Accuml. Values 1339.59 359.00 1686.54 3011.00 Num. Valid Values 24 24 24 24 Avg. Values 55.82 14.96 70.27 125.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.23 577.63 70.27 258.89 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2973 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.9997 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 = 0.6008 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3992 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.9257 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 = 4.4810 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.8419 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.169 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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