Detailed Weather Data for Project: MERE

Date Time TAIR WSPD RELH SRAD 04Nov2017 8 a.m. 17.22 11.00 36.00 6.00 04Nov2017 9 a.m. 17.78 12.00 34.00 66.00 04Nov2017 10 a.m. 20.00 10.00 30.00 192.00 04Nov2017 11 a.m. 24.44 10.00 24.00 490.00 04Nov2017 12 p.m. 25.00 12.00 22.00 433.00 04Nov2017 1 p.m. 25.56 7.00 25.00 328.00 04Nov2017 2 p.m. 25.56 11.00 20.00 226.00 04Nov2017 3 p.m. 27.22 11.00 18.00 250.00 04Nov2017 4 p.m. 27.22 11.00 17.00 228.00 04Nov2017 5 p.m. 27.22 11.00 18.00 169.00 04Nov2017 6 p.m. 24.44 5.00 23.00 43.00 04Nov2017 7 p.m. -901.00 -901.00 -901.00 -901.00 04Nov2017 8 p.m. 11.11 8.00 62.00 3.00 04Nov2017 9 p.m. 20.00 5.00 32.00 0.00 04Nov2017 10 p.m. 18.89 8.00 32.00 0.00 04Nov2017 11 p.m. 18.33 8.00 32.00 0.00 05Nov2017 12 a.m. 14.44 6.00 47.00 0.00 05Nov2017 1 a.m. 13.89 6.00 45.00 0.00 05Nov2017 2 a.m. 13.89 8.00 46.00 0.00 05Nov2017 3 a.m. 14.44 10.00 45.00 0.00 05Nov2017 4 a.m. 15.00 13.00 46.00 0.00 05Nov2017 5 a.m. 15.56 10.00 49.00 0.00 05Nov2017 6 a.m. 14.44 9.00 50.00 0.00 05Nov2017 7 a.m. 14.44 14.00 53.00 3.00 Accuml. Values 446.11 216.00 806.00 2437.00 Num. Valid Values 23 23 23 23 Avg. Values 19.40 9.39 35.04 105.96 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.00 362.65 35.04 218.64 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6496 definition: xcompl = 1 - (RELH_avg/100) TdC = -20.0061 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 = 0.2986 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7014 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.8048 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 = 2.3823 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.1591 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.097 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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