Detailed Weather Data for Project: COUN

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 65.44 16.10 78.73 0.00 04Dec2017 9 a.m. 65.73 16.40 77.52 37.70 04Dec2017 10 a.m. 66.36 18.50 74.34 79.60 04Dec2017 11 a.m. 66.51 17.00 68.67 121.10 04Dec2017 12 p.m. 64.09 21.00 57.99 163.80 04Dec2017 1 p.m. 57.25 23.90 47.92 296.90 04Dec2017 2 p.m. 57.79 19.50 43.75 418.60 04Dec2017 3 p.m. 60.31 30.30 40.23 334.20 04Dec2017 4 p.m. 56.43 33.20 40.83 118.40 04Dec2017 5 p.m. 51.78 24.70 47.95 19.20 04Dec2017 6 p.m. 48.29 20.00 48.79 0.00 04Dec2017 7 p.m. 41.04 7.50 31.54 0.00 04Dec2017 8 p.m. 42.13 19.20 52.99 0.00 04Dec2017 9 p.m. 39.87 8.90 58.68 0.00 04Dec2017 10 p.m. 37.31 10.20 59.94 0.00 04Dec2017 11 p.m. 34.97 10.90 54.88 0.00 05Dec2017 12 a.m. 33.21 6.80 50.70 0.00 05Dec2017 1 a.m. 32.52 3.60 49.36 0.00 05Dec2017 2 a.m. 31.69 2.20 51.48 0.00 05Dec2017 3 a.m. 30.15 5.90 53.43 0.00 05Dec2017 4 a.m. 27.27 11.40 54.99 0.00 05Dec2017 5 a.m. 26.38 11.00 52.50 0.00 05Dec2017 6 a.m. 26.46 12.40 50.61 0.00 05Dec2017 7 a.m. 26.06 11.20 49.49 0.00 Accuml. Values 1089.05 361.80 1297.31 1589.50 Num. Valid Values 24 24 24 24 Avg. Values 45.38 15.07 54.05 66.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.43 582.14 54.05 136.67 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4595 definition: xcompl = 1 - (RELH_avg/100) TdC = -1.2550 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 = 0.5174 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4826 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3302 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 = 4.7613 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.3235 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.165 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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