Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 53.31 2.02 54.89 61.00 04Mar2018 9 a.m. 54.28 5.18 53.48 86.00 04Mar2018 10 a.m. 54.84 5.67 54.27 99.00 04Mar2018 11 a.m. 55.94 5.51 53.85 78.00 04Mar2018 12 p.m. 56.70 6.76 54.40 105.00 04Mar2018 1 p.m. 58.80 2.91 52.88 88.00 04Mar2018 2 p.m. 57.38 4.52 55.56 48.00 04Mar2018 3 p.m. 56.93 4.66 60.20 62.00 04Mar2018 4 p.m. 55.94 4.99 67.29 71.00 04Mar2018 5 p.m. 55.71 5.40 70.45 61.00 04Mar2018 6 p.m. 54.39 6.31 72.71 24.00 04Mar2018 7 p.m. 55.72 5.41 25.09 7.00 04Mar2018 8 p.m. 54.41 5.22 64.29 3.00 04Mar2018 9 p.m. 51.55 4.44 83.04 3.00 04Mar2018 10 p.m. 49.89 4.20 91.03 3.00 04Mar2018 11 p.m. 54.09 6.57 68.99 3.00 05Mar2018 12 a.m. 56.05 3.63 67.10 3.00 05Mar2018 1 a.m. 54.50 0.20 78.51 3.00 05Mar2018 2 a.m. 58.26 0.12 77.60 3.00 05Mar2018 3 a.m. 59.79 1.55 80.96 3.00 05Mar2018 4 a.m. 59.45 2.23 83.82 3.00 05Mar2018 5 a.m. 60.57 1.76 86.15 3.00 05Mar2018 6 a.m. 61.66 1.42 87.31 3.00 05Mar2018 7 a.m. 63.64 1.08 84.87 4.00 Accuml. Values 1353.81 91.76 1628.74 827.00 Num. Valid Values 24 24 24 24 Avg. Values 56.41 3.82 67.86 34.46 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.56 147.64 67.86 71.11 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3214 definition: xcompl = 1 - (RELH_avg/100) TdC = 7.8080 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 = 0.6053 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.3947 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2578 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 = 4.9503 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.4654 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.048 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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