Detailed Weather Data for Project: MERE

Date Time TAIR WSPD RELH SRAD 06Nov2017 8 a.m. 5.56 3.00 91.00 15.00 06Nov2017 9 a.m. 5.56 3.00 93.00 44.00 06Nov2017 10 a.m. 6.11 4.00 88.00 82.00 06Nov2017 11 a.m. 7.78 1.00 81.00 163.00 06Nov2017 12 p.m. 10.00 4.00 72.00 295.00 06Nov2017 1 p.m. 12.78 5.00 60.00 538.00 06Nov2017 2 p.m. 13.33 4.00 57.00 513.00 06Nov2017 3 p.m. 12.78 6.00 57.00 311.00 06Nov2017 4 p.m. 12.22 8.00 60.00 166.00 06Nov2017 5 p.m. 10.56 8.00 63.00 63.00 06Nov2017 6 p.m. -901.00 -901.00 -901.00 -901.00 06Nov2017 7 p.m. 5.00 5.00 37.00 1.00 06Nov2017 8 p.m. 6.67 8.00 75.00 0.00 06Nov2017 9 p.m. 5.56 6.00 80.00 0.00 06Nov2017 10 p.m. 5.00 4.00 82.00 0.00 06Nov2017 11 p.m. 3.33 5.00 89.00 0.00 07Nov2017 12 a.m. 2.22 7.00 91.00 0.00 07Nov2017 1 a.m. 1.67 5.00 93.00 0.00 07Nov2017 2 a.m. 1.11 3.00 93.00 0.00 07Nov2017 3 a.m. 1.67 4.00 91.00 0.00 07Nov2017 4 a.m. 2.22 3.00 89.00 0.00 07Nov2017 5 a.m. 2.78 6.00 84.00 0.00 07Nov2017 6 a.m. 2.78 4.00 75.00 0.00 07Nov2017 7 a.m. 3.33 3.00 67.00 1.00 Accuml. Values 140.00 109.00 1768.00 2192.00 Num. Valid Values 23 23 23 23 Avg. Values 6.09 4.74 76.87 95.30 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -14.40 183.01 76.87 196.66 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.2313 definition: xcompl = 1 - (RELH_avg/100) TdC = -17.5529 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 = 0.2012 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7988 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.5037 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 = 0.4676 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.4870 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.019 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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