Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 05Dec2017 8 a.m. 29.01 4.70 41.73 0.00 05Dec2017 9 a.m. 29.14 6.00 41.88 38.20 05Dec2017 10 a.m. 30.54 8.60 38.13 168.80 05Dec2017 11 a.m. 32.34 7.80 32.48 259.90 05Dec2017 12 p.m. 34.81 8.00 26.70 507.00 05Dec2017 1 p.m. 37.53 7.40 23.06 528.70 05Dec2017 2 p.m. 40.46 7.80 18.53 510.20 05Dec2017 3 p.m. 42.58 6.60 16.34 433.30 05Dec2017 4 p.m. 43.93 8.10 15.04 268.70 05Dec2017 5 p.m. 43.25 4.70 17.68 71.00 05Dec2017 6 p.m. 40.37 3.20 21.35 0.00 05Dec2017 7 p.m. 39.96 2.70 31.65 0.00 05Dec2017 8 p.m. 34.25 2.70 31.66 0.00 05Dec2017 9 p.m. 33.58 5.60 33.01 0.00 05Dec2017 10 p.m. 33.01 5.60 36.17 0.00 05Dec2017 11 p.m. 31.75 5.90 40.11 0.00 06Dec2017 12 a.m. 31.03 6.20 42.50 0.00 06Dec2017 1 a.m. 31.01 5.00 43.52 0.00 06Dec2017 2 a.m. 30.27 2.90 46.24 0.00 06Dec2017 3 a.m. 28.98 0.70 52.00 0.00 06Dec2017 4 a.m. 28.17 1.20 53.97 0.00 06Dec2017 5 a.m. 26.80 1.30 57.66 0.00 06Dec2017 6 a.m. 26.44 0.20 62.95 0.00 06Dec2017 7 a.m. 25.38 0.50 65.84 0.00 Accuml. Values 804.58 113.40 890.20 2785.80 Num. Valid Values 24 24 24 24 Avg. Values 33.52 4.72 37.09 116.08 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 0.85 182.46 37.09 239.52 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6291 definition: xcompl = 1 - (RELH_avg/100) TdC = -12.3092 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 = 0.4166 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5834 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2102 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 = 4.1431 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.3157 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.096 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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