Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 3.54 5.70 59.55 0.00 02Jan2018 9 a.m. 4.05 4.60 58.33 71.40 02Jan2018 10 a.m. 6.58 1.80 54.12 222.00 02Jan2018 11 a.m. 9.34 1.50 49.71 225.30 02Jan2018 12 p.m. 12.04 1.80 47.04 324.30 02Jan2018 1 p.m. 14.11 2.70 41.92 352.00 02Jan2018 2 p.m. 15.89 4.40 37.81 326.20 02Jan2018 3 p.m. 17.92 4.50 34.51 344.00 02Jan2018 4 p.m. 18.14 4.30 33.54 103.00 02Jan2018 5 p.m. 19.38 4.10 32.35 84.90 02Jan2018 6 p.m. 18.23 3.30 33.44 0.30 02Jan2018 7 p.m. 24.62 2.80 40.39 0.00 02Jan2018 8 p.m. 13.28 1.50 44.67 0.00 02Jan2018 9 p.m. 12.67 3.30 48.23 0.00 02Jan2018 10 p.m. 12.56 3.20 49.51 0.00 02Jan2018 11 p.m. 11.21 2.90 52.95 0.00 03Jan2018 12 a.m. 11.35 4.00 51.78 0.00 03Jan2018 1 a.m. 11.17 3.90 53.09 0.00 03Jan2018 2 a.m. 13.06 5.60 48.00 0.00 03Jan2018 3 a.m. 13.87 6.30 46.04 0.00 03Jan2018 4 a.m. 12.78 4.90 49.12 0.00 03Jan2018 5 a.m. 11.73 3.80 52.13 0.00 03Jan2018 6 a.m. 10.58 1.80 55.74 0.00 03Jan2018 7 a.m. 9.75 1.40 58.91 0.00 Accuml. Values 307.87 84.10 1132.88 2053.40 Num. Valid Values 24 24 24 24 Avg. Values 12.83 3.50 47.20 85.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.65 135.32 47.20 176.55 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5280 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.7939 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 = 0.2482 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7518 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.3764 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 = 1.4531 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1288 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.037 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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