Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 15.48 5.40 76.15 0.00 30Dec2017 9 a.m. 13.87 5.40 71.93 10.90 30Dec2017 10 a.m. 13.03 4.80 69.97 65.20 30Dec2017 11 a.m. 13.35 7.90 65.28 129.40 30Dec2017 12 p.m. 14.54 7.30 60.15 238.80 30Dec2017 1 p.m. 16.92 11.40 51.84 392.40 30Dec2017 2 p.m. 18.23 10.00 48.06 519.00 30Dec2017 3 p.m. 19.09 10.70 45.90 433.90 30Dec2017 4 p.m. 19.18 11.40 43.31 277.80 30Dec2017 5 p.m. 18.79 14.30 44.76 53.10 30Dec2017 6 p.m. 17.26 10.40 44.84 0.00 30Dec2017 7 p.m. 8.56 4.80 47.68 0.00 30Dec2017 8 p.m. 14.22 12.00 50.54 0.00 30Dec2017 9 p.m. 13.06 13.60 52.23 0.00 30Dec2017 10 p.m. 11.64 15.50 53.32 0.00 30Dec2017 11 p.m. 10.60 16.40 56.49 0.00 31Dec2017 12 a.m. 10.27 13.40 58.53 0.00 31Dec2017 1 a.m. 9.68 10.00 60.89 0.00 31Dec2017 2 a.m. 9.48 9.20 61.20 0.00 31Dec2017 3 a.m. 9.28 5.40 57.82 0.00 31Dec2017 4 a.m. 8.76 5.10 58.40 0.00 31Dec2017 5 a.m. 8.46 4.60 59.21 0.00 31Dec2017 6 a.m. 8.13 4.50 59.46 0.00 31Dec2017 7 a.m. 7.57 5.10 57.93 0.00 Accuml. Values 309.47 218.60 1355.89 2120.50 Num. Valid Values 24 24 24 24 Avg. Values 12.89 9.11 56.50 88.35 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.61 351.73 56.50 182.32 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4350 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.5930 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 = 0.2487 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7513 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4258 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 = 1.1964 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6861 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.054 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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