Detailed Weather Data for Project: BIGH

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 6.62 5.00 57.76 0.00 31Dec2017 9 a.m. 6.10 4.90 58.06 102.50 31Dec2017 10 a.m. 6.94 5.50 52.47 316.80 31Dec2017 11 a.m. 8.74 6.70 52.09 386.60 31Dec2017 12 p.m. 9.48 5.80 45.94 256.10 31Dec2017 1 p.m. 9.91 6.60 46.28 408.50 31Dec2017 2 p.m. 11.03 5.60 47.32 466.40 31Dec2017 3 p.m. 11.39 6.50 48.01 387.40 31Dec2017 4 p.m. 11.68 5.70 46.02 148.70 31Dec2017 5 p.m. 10.92 5.00 45.10 29.20 31Dec2017 6 p.m. 9.84 4.70 45.79 0.00 31Dec2017 7 p.m. 10.04 6.80 41.24 0.00 31Dec2017 8 p.m. 7.21 4.70 49.40 0.00 31Dec2017 9 p.m. 6.10 4.80 51.67 0.00 31Dec2017 10 p.m. 4.84 4.40 55.57 0.00 31Dec2017 11 p.m. 3.60 5.20 60.66 0.00 01Jan2018 12 a.m. 2.14 4.40 62.90 0.00 01Jan2018 1 a.m. 0.54 4.40 62.86 0.00 01Jan2018 2 a.m. -0.40 4.10 64.73 0.00 01Jan2018 3 a.m. -1.34 4.40 64.44 0.00 01Jan2018 4 a.m. -1.88 4.40 67.36 0.00 01Jan2018 5 a.m. -2.72 4.20 67.27 0.00 01Jan2018 6 a.m. -3.39 4.30 66.96 0.00 01Jan2018 7 a.m. -4.18 4.20 64.80 0.00 Accuml. Values 123.22 122.30 1324.70 2502.20 Num. Valid Values 24 24 24 24 Avg. Values 5.13 5.10 55.20 104.26 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -14.93 196.78 55.20 215.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4480 definition: xcompl = 1 - (RELH_avg/100) TdC = -21.9187 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 = 0.1950 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.8050 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.6525 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 = 0.8673 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8740 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.033 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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