Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 14.47 0.60 74.48 0.00 02Jan2018 9 a.m. 15.31 1.20 68.96 39.50 02Jan2018 10 a.m. 16.54 1.40 58.84 82.30 02Jan2018 11 a.m. 18.05 1.10 50.76 102.70 02Jan2018 12 p.m. 19.09 1.60 45.25 136.40 02Jan2018 1 p.m. 20.46 2.60 43.26 319.30 02Jan2018 2 p.m. 21.16 2.70 42.58 189.10 02Jan2018 3 p.m. 21.81 3.20 42.74 175.20 02Jan2018 4 p.m. 22.32 4.20 41.67 130.10 02Jan2018 5 p.m. 22.08 3.00 43.04 35.70 02Jan2018 6 p.m. 21.94 1.20 44.50 0.00 02Jan2018 7 p.m. 27.52 0.10 64.46 0.00 02Jan2018 8 p.m. 20.70 0.70 48.61 0.00 02Jan2018 9 p.m. 19.53 1.80 50.98 0.00 02Jan2018 10 p.m. 17.80 1.40 56.60 0.00 02Jan2018 11 p.m. 16.66 1.10 58.38 0.00 03Jan2018 12 a.m. 16.39 1.20 59.58 0.00 03Jan2018 1 a.m. 16.12 0.50 60.95 0.00 03Jan2018 2 a.m. 15.44 1.60 65.03 0.00 03Jan2018 3 a.m. 14.74 2.30 66.55 0.00 03Jan2018 4 a.m. 13.91 1.60 69.32 0.00 03Jan2018 5 a.m. 13.64 3.50 70.48 0.00 03Jan2018 6 a.m. 13.42 2.80 70.36 0.00 03Jan2018 7 a.m. 13.19 1.60 71.90 0.00 Accuml. Values 432.30 43.00 1369.28 1210.30 Num. Valid Values 24 24 24 24 Avg. Values 18.01 1.79 57.05 50.43 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.77 69.19 57.05 104.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4295 definition: xcompl = 1 - (RELH_avg/100) TdC = -14.7979 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 = 0.2877 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7123 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.1993 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 = 1.4768 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8747 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.022 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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