Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 06Dec2017 8 a.m. 26.92 0.30 77.54 7.00 06Dec2017 9 a.m. 31.03 0.90 68.19 147.60 06Dec2017 10 a.m. 36.70 3.50 51.64 313.40 06Dec2017 11 a.m. 40.39 4.50 45.96 450.20 06Dec2017 12 p.m. 43.83 4.20 43.86 536.80 06Dec2017 1 p.m. 48.13 4.20 38.93 567.10 06Dec2017 2 p.m. 50.74 7.20 35.44 529.70 06Dec2017 3 p.m. 52.38 8.90 31.71 431.60 06Dec2017 4 p.m. 53.10 7.60 30.94 283.40 06Dec2017 5 p.m. 52.29 6.00 31.74 95.80 06Dec2017 6 p.m. 48.69 4.00 36.76 0.00 06Dec2017 7 p.m. 28.74 0.50 48.02 0.00 06Dec2017 8 p.m. 42.84 2.10 52.80 0.00 06Dec2017 9 p.m. 41.40 2.60 55.95 0.00 06Dec2017 10 p.m. 38.10 0.10 63.08 0.00 06Dec2017 11 p.m. 34.25 0.00 77.58 0.00 07Dec2017 12 a.m. 32.23 0.30 92.97 0.00 07Dec2017 1 a.m. 34.07 3.80 72.80 0.00 07Dec2017 2 a.m. 34.16 6.80 65.62 0.00 07Dec2017 3 a.m. 33.48 11.50 67.53 0.00 07Dec2017 4 a.m. 31.46 11.50 64.72 0.00 07Dec2017 5 a.m. 28.96 9.60 60.45 0.00 07Dec2017 6 a.m. 27.93 8.00 61.93 0.00 07Dec2017 7 a.m. 25.70 7.50 67.97 0.00 Accuml. Values 917.49 115.60 1344.13 3362.60 Num. Valid Values 24 23 24 24 Avg. Values 38.23 5.03 56.01 140.11 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 3.46 194.09 56.01 289.12 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4399 definition: xcompl = 1 - (RELH_avg/100) TdC = -4.4841 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 = 0.4569 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5431 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.8328 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 = 3.4637 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.9328 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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