Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 60.04 12.20 82.11 0.00 04Dec2017 9 a.m. 60.80 12.50 84.29 10.70 04Dec2017 10 a.m. 62.22 15.00 81.96 85.20 04Dec2017 11 a.m. 64.83 16.90 75.62 228.10 04Dec2017 12 p.m. 66.61 15.50 70.73 134.60 04Dec2017 1 p.m. 69.57 15.70 61.21 224.10 04Dec2017 2 p.m. 71.80 15.90 51.87 208.50 04Dec2017 3 p.m. 71.91 12.30 44.93 113.60 04Dec2017 4 p.m. 66.99 17.00 38.51 110.70 04Dec2017 5 p.m. 60.49 14.40 32.90 55.60 04Dec2017 6 p.m. 58.75 12.40 34.91 0.00 04Dec2017 7 p.m. 37.78 2.60 25.22 0.00 04Dec2017 8 p.m. 49.10 17.10 38.12 0.00 04Dec2017 9 p.m. 45.27 14.60 35.92 0.00 04Dec2017 10 p.m. 42.44 11.50 38.45 0.00 04Dec2017 11 p.m. 39.45 8.30 42.69 0.00 05Dec2017 12 a.m. 37.36 8.30 46.54 0.00 05Dec2017 1 a.m. 35.20 11.60 48.80 0.00 05Dec2017 2 a.m. 32.54 8.60 45.95 0.00 05Dec2017 3 a.m. 30.87 7.20 42.56 0.00 05Dec2017 4 a.m. 29.71 6.10 39.96 0.00 05Dec2017 5 a.m. 29.21 6.80 41.05 0.00 05Dec2017 6 a.m. 29.01 5.10 41.56 0.00 05Dec2017 7 a.m. 29.03 5.20 41.50 0.00 Accuml. Values 1180.99 272.80 1187.36 1171.10 Num. Valid Values 24 24 24 24 Avg. Values 49.21 11.37 49.47 48.80 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 9.56 438.94 49.47 100.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5053 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.5252 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 = 0.5488 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4512 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0034 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 = 6.0583 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.2624 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.147 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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