Detailed Weather Data for Project: WAUR

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 11.75 11.19 72.82 3.00 01Jan2018 9 a.m. 12.85 17.99 74.23 117.00 01Jan2018 10 a.m. 14.72 13.82 72.70 285.00 01Jan2018 11 a.m. 16.59 16.67 63.30 426.00 01Jan2018 12 p.m. 17.91 10.53 55.49 519.00 01Jan2018 1 p.m. 19.78 11.85 53.29 555.00 01Jan2018 2 p.m. 21.20 10.09 48.65 530.00 01Jan2018 3 p.m. 22.96 10.75 46.39 444.00 01Jan2018 4 p.m. 23.50 7.68 43.10 308.00 01Jan2018 5 p.m. 23.85 8.12 42.49 147.00 01Jan2018 6 p.m. 23.07 9.87 47.80 12.00 01Jan2018 7 p.m. 23.29 8.34 55.37 0.00 01Jan2018 8 p.m. 20.77 10.97 60.62 0.00 01Jan2018 9 p.m. 19.56 10.75 59.94 0.00 01Jan2018 10 p.m. 18.57 10.31 60.49 0.00 01Jan2018 11 p.m. 18.12 9.87 64.22 0.00 02Jan2018 12 a.m. 17.13 10.53 65.80 0.00 02Jan2018 1 a.m. 15.82 10.53 70.32 0.00 02Jan2018 2 a.m. 15.15 11.19 72.09 0.00 02Jan2018 3 a.m. 13.95 11.19 72.70 0.00 02Jan2018 4 a.m. 14.61 12.73 75.39 0.00 02Jan2018 5 a.m. 14.83 12.73 73.13 0.00 02Jan2018 6 a.m. 15.71 13.60 74.66 0.00 02Jan2018 7 a.m. 15.71 8.56 71.54 0.00 Accuml. Values 431.40 269.86 1496.53 3346.00 Num. Valid Values 24 24 24 24 Avg. Values 17.98 11.24 62.36 139.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.79 434.20 62.36 287.69 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3764 definition: xcompl = 1 - (RELH_avg/100) TdC = -13.7148 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 = 0.2874 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7126 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.4281 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 = 1.2894 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1001 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.075 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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