Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 26.15 13.70 46.12 0.00 05Dec2017 9 a.m. 27.45 15.30 43.90 94.50 05Dec2017 10 a.m. 32.67 18.10 39.36 285.40 05Dec2017 11 a.m. 37.11 18.70 31.35 405.20 05Dec2017 12 p.m. 40.05 18.00 25.47 475.70 05Dec2017 1 p.m. 43.11 17.60 22.57 491.00 05Dec2017 2 p.m. 45.21 21.10 20.39 449.60 05Dec2017 3 p.m. 46.40 19.50 20.21 353.50 05Dec2017 4 p.m. 47.61 19.00 22.20 217.30 05Dec2017 5 p.m. 47.48 14.20 25.41 56.50 05Dec2017 6 p.m. 44.11 7.00 28.08 0.00 05Dec2017 7 p.m. 41.22 2.20 51.95 0.00 05Dec2017 8 p.m. 40.03 9.90 32.06 0.00 05Dec2017 9 p.m. 38.52 10.40 33.51 0.00 05Dec2017 10 p.m. 37.83 10.60 34.67 0.00 05Dec2017 11 p.m. 37.62 11.90 34.98 0.00 06Dec2017 12 a.m. 40.69 15.90 31.29 0.00 06Dec2017 1 a.m. 42.21 19.60 32.35 0.00 06Dec2017 2 a.m. 40.69 17.70 36.33 0.00 06Dec2017 3 a.m. 40.60 16.50 37.92 0.00 06Dec2017 4 a.m. 38.12 15.70 45.99 0.00 06Dec2017 5 a.m. 36.30 11.90 51.65 0.00 06Dec2017 6 a.m. 33.44 7.50 54.61 0.00 06Dec2017 7 a.m. 30.60 2.60 57.95 0.00 Accuml. Values 935.20 334.60 860.32 2828.70 Num. Valid Values 24 24 24 24 Avg. Values 38.97 13.94 35.85 117.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.87 538.37 35.85 243.21 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6415 definition: xcompl = 1 - (RELH_avg/100) TdC = -10.0408 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 = 0.4632 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5368 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3508 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 = 5.2356 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.5042 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.204 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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