Detailed Weather Data for Project: WEBB

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 52.77 4.90 80.53 0.00 06Nov2017 9 a.m. 52.93 3.50 82.18 15.00 06Nov2017 10 a.m. 52.18 4.10 93.68 27.70 06Nov2017 11 a.m. 51.60 5.80 99.12 45.80 06Nov2017 12 p.m. 52.12 5.50 99.26 64.70 06Nov2017 1 p.m. 52.59 5.30 99.31 72.40 06Nov2017 2 p.m. 52.97 5.30 99.34 69.90 06Nov2017 3 p.m. 52.72 7.00 99.31 63.60 06Nov2017 4 p.m. 50.34 10.40 99.23 30.50 06Nov2017 5 p.m. 49.23 9.10 99.22 8.40 06Nov2017 6 p.m. 48.51 9.00 99.21 0.00 06Nov2017 7 p.m. 44.64 6.30 94.00 0.00 06Nov2017 8 p.m. 45.84 9.40 99.11 0.00 06Nov2017 9 p.m. 45.32 9.10 99.17 0.00 06Nov2017 10 p.m. 44.94 8.50 99.17 0.00 06Nov2017 11 p.m. 44.19 8.60 99.13 0.00 07Nov2017 12 a.m. 43.66 9.40 99.11 0.00 07Nov2017 1 a.m. 43.54 8.30 99.11 0.00 07Nov2017 2 a.m. 43.30 8.60 99.09 0.00 07Nov2017 3 a.m. 43.63 8.10 99.12 0.00 07Nov2017 4 a.m. 43.75 8.40 99.12 0.00 07Nov2017 5 a.m. 43.83 8.50 99.17 0.00 07Nov2017 6 a.m. 44.08 9.80 99.18 0.00 07Nov2017 7 a.m. 43.77 10.50 99.14 0.00 Accuml. Values 1142.45 183.40 2334.01 398.00 Num. Valid Values 24 24 24 24 Avg. Values 47.60 7.64 97.25 16.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 8.67 295.09 97.25 34.22 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0275 definition: xcompl = 1 - (RELH_avg/100) TdC = 8.2403 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 = 0.5357 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4643 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6887 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 = 0.3214 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.4699 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.000 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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