Detailed Weather Data for Project: JOHN

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 35.87 11.30 63.59 9.40 06Dec2017 9 a.m. 36.79 16.10 61.78 175.40 06Dec2017 10 a.m. 38.62 17.20 58.07 342.70 06Dec2017 11 a.m. 42.13 20.40 53.55 472.30 06Dec2017 12 p.m. 43.23 20.60 52.88 544.30 06Dec2017 1 p.m. 45.01 22.90 46.35 555.10 06Dec2017 2 p.m. 45.86 25.30 43.22 501.10 06Dec2017 3 p.m. 46.22 26.10 42.43 363.70 06Dec2017 4 p.m. 46.53 25.20 42.16 218.80 06Dec2017 5 p.m. 46.53 22.90 41.14 43.30 06Dec2017 6 p.m. 45.23 16.40 45.21 0.00 06Dec2017 7 p.m. 29.80 13.50 41.71 0.00 06Dec2017 8 p.m. 41.31 22.10 51.45 0.00 06Dec2017 9 p.m. 38.39 20.20 59.66 0.00 06Dec2017 10 p.m. 35.31 22.20 63.85 0.00 06Dec2017 11 p.m. 31.59 21.50 61.78 0.00 07Dec2017 12 a.m. 29.55 22.90 62.29 0.00 07Dec2017 1 a.m. 27.97 27.10 67.10 0.00 07Dec2017 2 a.m. 26.10 24.10 70.95 0.00 07Dec2017 3 a.m. 24.71 20.10 74.75 0.00 07Dec2017 4 a.m. 23.47 19.80 75.15 0.00 07Dec2017 5 a.m. 22.44 19.50 76.68 0.00 07Dec2017 6 a.m. 21.97 19.40 78.59 0.00 07Dec2017 7 a.m. 21.49 18.80 81.75 0.00 Accuml. Values 846.12 495.60 1416.09 3226.10 Num. Valid Values 24 24 24 24 Avg. Values 35.26 20.65 59.00 134.42 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 1.81 797.42 59.00 277.38 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4100 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.3342 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 = 0.4314 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5686 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.6393 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 = 2.8674 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 6.9049 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.182 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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