Detailed Weather Data for Project: CHEN

Date Time TAIR WSPD RELH SRAD 07Nov2017 8 a.m. 32.43 10.88 86.76 96.00 07Nov2017 9 a.m. 35.06 15.07 81.02 211.00 07Nov2017 10 a.m. 35.94 16.96 75.16 372.00 07Nov2017 11 a.m. 37.60 13.84 69.79 366.00 07Nov2017 12 p.m. 38.35 15.81 69.48 318.00 07Nov2017 1 p.m. 39.56 15.89 66.36 345.00 07Nov2017 2 p.m. 40.44 16.04 67.41 59.00 07Nov2017 3 p.m. 42.21 14.80 58.74 80.00 07Nov2017 4 p.m. 42.10 15.48 47.32 51.00 07Nov2017 5 p.m. 42.08 10.14 48.41 24.00 07Nov2017 6 p.m. 40.98 9.63 48.41 0.00 07Nov2017 7 p.m. 42.42 3.25 46.09 0.00 07Nov2017 8 p.m. 37.49 7.83 56.91 0.00 07Nov2017 9 p.m. 34.95 6.97 65.51 0.00 07Nov2017 10 p.m. 33.96 9.90 65.27 0.00 07Nov2017 11 p.m. 32.32 9.23 69.73 0.00 08Nov2017 12 a.m. 30.88 8.64 74.18 0.00 08Nov2017 1 a.m. 30.34 7.87 75.22 0.00 08Nov2017 2 a.m. 29.79 8.28 81.88 0.00 08Nov2017 3 a.m. 29.01 10.15 79.99 0.00 08Nov2017 4 a.m. 28.69 9.11 80.53 0.00 08Nov2017 5 a.m. 29.14 7.71 81.39 0.00 08Nov2017 6 a.m. 28.15 4.21 83.47 1.00 08Nov2017 7 a.m. 29.70 5.20 85.80 1.00 Accuml. Values 843.60 252.89 1664.83 1924.00 Num. Valid Values 24 24 24 24 Avg. Values 35.15 10.54 69.37 80.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.75 406.90 69.37 165.43 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3063 definition: xcompl = 1 - (RELH_avg/100) TdC = -3.2238 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 = 0.4305 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5695 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4930 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 = 2.1254 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.1064 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.078 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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