Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 14.54 1.80 61.00 0.10 02Jan2018 9 a.m. 15.06 2.40 60.02 22.30 02Jan2018 10 a.m. 16.45 1.80 55.45 80.40 02Jan2018 11 a.m. 18.07 1.30 51.54 125.90 02Jan2018 12 p.m. 19.49 1.80 50.18 249.00 02Jan2018 1 p.m. 20.75 2.20 47.33 249.10 02Jan2018 2 p.m. 22.78 1.90 40.65 216.50 02Jan2018 3 p.m. 23.59 3.30 41.82 158.40 02Jan2018 4 p.m. 23.95 2.50 40.47 75.20 02Jan2018 5 p.m. 24.12 2.70 41.31 14.30 02Jan2018 6 p.m. 23.83 5.10 43.43 0.00 02Jan2018 7 p.m. 31.33 1.60 58.89 0.00 02Jan2018 8 p.m. 22.59 2.70 45.06 0.00 02Jan2018 9 p.m. 21.16 1.30 48.76 0.00 02Jan2018 10 p.m. 19.56 1.60 52.16 0.00 02Jan2018 11 p.m. 18.18 0.80 54.32 0.00 03Jan2018 12 a.m. 17.15 0.50 55.55 0.00 03Jan2018 1 a.m. 16.48 0.90 57.44 0.00 03Jan2018 2 a.m. 15.42 1.20 59.33 0.00 03Jan2018 3 a.m. 16.99 1.30 56.13 0.00 03Jan2018 4 a.m. 15.10 1.80 60.34 0.00 03Jan2018 5 a.m. 13.91 1.60 64.49 0.00 03Jan2018 6 a.m. 14.58 1.50 64.54 0.00 03Jan2018 7 a.m. 15.10 3.20 66.42 0.00 Accuml. Values 460.18 46.80 1276.63 1191.20 Num. Valid Values 24 24 24 24 Avg. Values 19.17 1.95 53.19 49.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.13 75.30 53.19 102.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4681 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.0643 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 = 0.2968 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7032 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2074 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 = 1.6953 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.0158 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.026 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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