Detailed Weather Data for Project: WEBB

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 43.95 7.20 99.13 1.10 07Nov2017 9 a.m. 44.29 7.80 99.00 19.90 07Nov2017 10 a.m. 45.01 8.40 98.62 56.80 07Nov2017 11 a.m. 45.54 8.00 96.71 99.90 07Nov2017 12 p.m. 46.17 8.80 95.18 91.30 07Nov2017 1 p.m. 46.04 10.20 94.09 71.50 07Nov2017 2 p.m. 45.97 9.50 94.67 54.80 07Nov2017 3 p.m. 45.34 11.70 96.76 44.80 07Nov2017 4 p.m. 44.60 9.70 98.13 21.70 07Nov2017 5 p.m. 44.71 8.20 98.36 9.90 07Nov2017 6 p.m. 44.74 6.70 97.74 0.00 07Nov2017 7 p.m. 42.58 1.20 79.21 0.00 07Nov2017 8 p.m. 44.06 6.10 89.67 0.00 07Nov2017 9 p.m. 43.66 5.30 87.89 0.00 07Nov2017 10 p.m. 43.23 5.90 87.58 0.00 07Nov2017 11 p.m. 43.18 5.20 87.32 0.00 08Nov2017 12 a.m. 43.29 5.60 88.44 0.00 08Nov2017 1 a.m. 43.57 5.40 89.02 0.00 08Nov2017 2 a.m. 43.54 5.90 86.24 0.00 08Nov2017 3 a.m. 43.43 4.10 83.70 0.00 08Nov2017 4 a.m. 43.57 6.20 82.90 0.00 08Nov2017 5 a.m. 43.05 3.60 83.49 0.00 08Nov2017 6 a.m. 42.80 5.90 83.22 0.00 08Nov2017 7 a.m. 42.66 7.60 82.21 0.00 Accuml. Values 1058.99 164.20 2179.28 471.70 Num. Valid Values 24 24 24 24 Avg. Values 44.12 6.84 90.80 19.65 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.74 264.20 90.80 40.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.0920 definition: xcompl = 1 - (RELH_avg/100) TdC = 5.3142 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 = 0.5069 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4931 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.6392 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 = 0.9239 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.1063 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.009 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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