Detailed Weather Data for Project: HEYB

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 5.38 7.60 69.78 0.00 01Jan2018 9 a.m. 5.58 7.80 70.03 94.90 01Jan2018 10 a.m. 6.60 7.60 66.53 278.10 01Jan2018 11 a.m. 8.80 6.60 58.42 419.00 01Jan2018 12 p.m. 11.37 5.30 49.95 508.20 01Jan2018 1 p.m. 13.71 5.20 44.61 536.50 01Jan2018 2 p.m. 15.40 4.80 41.30 501.20 01Jan2018 3 p.m. 16.84 4.40 39.44 306.30 01Jan2018 4 p.m. 17.76 5.80 37.69 126.30 01Jan2018 5 p.m. 17.20 6.20 38.09 28.10 01Jan2018 6 p.m. 16.00 4.80 39.23 0.00 01Jan2018 7 p.m. 23.16 4.60 43.83 0.00 01Jan2018 8 p.m. 14.61 4.90 47.53 0.00 01Jan2018 9 p.m. 14.56 4.40 48.07 0.00 01Jan2018 10 p.m. 14.92 4.80 47.31 0.00 01Jan2018 11 p.m. 14.47 3.70 49.47 0.00 02Jan2018 12 a.m. 14.09 3.50 52.13 0.00 02Jan2018 1 a.m. 14.09 3.50 52.42 0.00 02Jan2018 2 a.m. 13.89 3.90 54.09 0.00 02Jan2018 3 a.m. 13.80 3.20 55.19 0.00 02Jan2018 4 a.m. 13.60 3.20 58.00 0.00 02Jan2018 5 a.m. 13.98 2.60 57.96 0.00 02Jan2018 6 a.m. 14.20 2.80 58.85 0.00 02Jan2018 7 a.m. 13.96 2.10 58.85 0.00 Accuml. Values 327.99 113.30 1238.77 2798.60 Num. Valid Values 24 24 24 24 Avg. Values 13.67 4.72 51.62 116.61 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.19 182.30 51.62 240.62 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4838 definition: xcompl = 1 - (RELH_avg/100) TdC = -18.2869 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 = 0.2544 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7456 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.9407 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 = 1.3799 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2594 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.046 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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