Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 30Dec2017 8 a.m. 9.63 16.60 85.15 0.80 30Dec2017 9 a.m. 9.32 17.70 84.00 96.00 30Dec2017 10 a.m. 10.29 14.80 76.73 290.80 30Dec2017 11 a.m. 11.28 15.70 68.85 425.40 30Dec2017 12 p.m. 13.26 13.10 63.78 516.40 30Dec2017 1 p.m. 14.32 13.60 60.14 486.50 30Dec2017 2 p.m. 15.84 11.30 54.92 481.50 30Dec2017 3 p.m. 17.02 11.00 51.97 405.00 30Dec2017 4 p.m. 16.54 10.00 51.03 122.50 30Dec2017 5 p.m. 16.07 10.20 49.82 35.40 30Dec2017 6 p.m. 13.89 9.90 50.12 0.00 30Dec2017 7 p.m. 7.00 12.70 62.27 0.00 30Dec2017 8 p.m. 10.11 10.70 57.17 0.00 30Dec2017 9 p.m. 9.77 9.40 60.98 0.00 30Dec2017 10 p.m. 9.64 7.90 64.04 0.00 30Dec2017 11 p.m. 9.18 9.50 66.88 0.00 31Dec2017 12 a.m. 9.09 14.10 67.99 0.00 31Dec2017 1 a.m. 9.25 17.10 67.20 0.00 31Dec2017 2 a.m. 8.28 16.20 69.06 0.00 31Dec2017 3 a.m. 7.56 14.00 67.23 0.00 31Dec2017 4 a.m. 7.21 13.30 69.42 0.00 31Dec2017 5 a.m. 6.76 15.70 70.44 0.00 31Dec2017 6 a.m. 5.95 16.30 71.68 0.00 31Dec2017 7 a.m. 5.25 14.90 71.65 0.00 Accuml. Values 252.52 315.70 1562.52 2860.30 Num. Valid Values 24 24 24 24 Avg. Values 10.52 13.15 65.11 119.18 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -11.93 507.96 65.11 245.93 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3489 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.1346 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 = 0.2315 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7685 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9567 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 = 0.8605 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.6586 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.059 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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