Detailed Weather Data for Project: FSUP

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 5.94 4.20 67.61 0.00 31Dec2017 9 a.m. 4.78 5.20 68.85 50.40 31Dec2017 10 a.m. 5.00 5.50 66.31 156.10 31Dec2017 11 a.m. 6.10 4.90 64.46 261.00 31Dec2017 12 p.m. 9.09 4.20 57.37 336.10 31Dec2017 1 p.m. 10.71 5.10 50.67 394.80 31Dec2017 2 p.m. 12.92 4.70 44.92 524.00 31Dec2017 3 p.m. 14.43 4.60 39.97 422.40 31Dec2017 4 p.m. 14.97 4.30 39.16 165.80 31Dec2017 5 p.m. 14.00 3.80 38.48 78.90 31Dec2017 6 p.m. 12.18 3.00 40.74 1.70 31Dec2017 7 p.m. 10.58 6.80 39.61 0.00 31Dec2017 8 p.m. 9.48 2.40 44.80 0.00 31Dec2017 9 p.m. 8.26 2.80 45.67 0.00 31Dec2017 10 p.m. 6.67 2.10 48.78 0.00 31Dec2017 11 p.m. 4.98 1.80 52.62 0.00 01Jan2018 12 a.m. 3.09 2.40 54.78 0.00 01Jan2018 1 a.m. 1.65 2.90 55.02 0.00 01Jan2018 2 a.m. 0.61 2.90 56.56 0.00 01Jan2018 3 a.m. -0.81 3.00 57.65 0.00 01Jan2018 4 a.m. -2.33 2.90 60.70 0.00 01Jan2018 5 a.m. -3.19 1.50 62.31 0.00 01Jan2018 6 a.m. -3.96 1.20 63.60 0.00 01Jan2018 7 a.m. -4.63 0.80 65.20 0.00 Accuml. Values 140.52 83.00 1285.84 2391.20 Num. Valid Values 24 24 24 24 Avg. Values 5.85 3.46 53.58 99.63 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -14.53 133.55 53.58 205.60 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4642 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.8914 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 = 0.1997 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8003 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5768 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 = 0.9297 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.7571 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.028 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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