Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 04Mar2018 8 a.m. 52.30 8.80 55.35 5.20 04Mar2018 9 a.m. 52.48 12.80 55.66 42.70 04Mar2018 10 a.m. 52.97 9.90 56.23 57.90 04Mar2018 11 a.m. 53.51 11.40 54.95 93.60 04Mar2018 12 p.m. 54.68 10.70 53.93 98.60 04Mar2018 1 p.m. 54.95 12.20 55.94 119.10 04Mar2018 2 p.m. 54.36 12.70 58.40 141.00 04Mar2018 3 p.m. 53.91 11.40 60.73 42.90 04Mar2018 4 p.m. 54.39 11.30 62.65 85.50 04Mar2018 5 p.m. 54.43 9.90 65.36 23.80 04Mar2018 6 p.m. 54.75 11.40 67.59 4.40 04Mar2018 7 p.m. 56.30 8.00 21.26 1.90 04Mar2018 8 p.m. 54.50 10.70 70.84 0.00 04Mar2018 9 p.m. 53.53 12.80 77.81 0.00 04Mar2018 10 p.m. 53.22 15.50 79.83 0.00 04Mar2018 11 p.m. 53.17 17.60 76.33 0.00 05Mar2018 12 a.m. 53.26 15.70 76.05 0.00 05Mar2018 1 a.m. 53.29 12.70 75.60 0.00 05Mar2018 2 a.m. 53.46 11.90 76.54 0.00 05Mar2018 3 a.m. 54.41 12.70 77.87 0.00 05Mar2018 4 a.m. 54.93 14.20 82.31 0.00 05Mar2018 5 a.m. 55.81 11.70 87.97 0.00 05Mar2018 6 a.m. 56.59 9.10 95.36 0.00 05Mar2018 7 a.m. 57.36 5.50 99.11 0.00 Accuml. Values 1302.56 280.60 1643.67 716.60 Num. Valid Values 24 24 24 24 Avg. Values 54.27 11.69 68.49 29.86 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.37 451.49 68.49 61.61 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3151 definition: xcompl = 1 - (RELH_avg/100) TdC = 6.8027 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 = 0.5890 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4110 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.3759 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 = 4.4957 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.4913 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.096 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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