Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 03Mar2018 8 a.m. 44.26 7.29 66.03 0.11 03Mar2018 9 a.m. 47.59 10.57 61.18 0.11 03Mar2018 10 a.m. 51.28 13.29 55.62 0.11 03Mar2018 11 a.m. 53.65 14.42 51.90 0.10 03Mar2018 12 p.m. 57.00 12.09 47.56 0.10 03Mar2018 1 p.m. 59.65 12.60 45.70 0.10 03Mar2018 2 p.m. 62.10 12.98 43.10 0.33 03Mar2018 3 p.m. 63.86 12.27 41.57 203.07 03Mar2018 4 p.m. 65.19 12.98 39.32 526.83 03Mar2018 5 p.m. 65.30 11.93 38.99 282.09 03Mar2018 6 p.m. 64.54 13.16 39.14 71.15 03Mar2018 7 p.m. 53.04 10.19 72.28 0.10 03Mar2018 8 p.m. 60.17 10.34 44.48 0.10 03Mar2018 9 p.m. 58.19 8.53 47.42 0.10 03Mar2018 10 p.m. 56.16 7.59 50.11 0.10 03Mar2018 11 p.m. 54.37 6.17 52.48 0.10 04Mar2018 12 a.m. 52.11 3.58 56.90 0.11 04Mar2018 1 a.m. 51.03 7.27 58.43 0.10 04Mar2018 2 a.m. 52.27 8.31 53.56 0.10 04Mar2018 3 a.m. 52.30 9.63 49.00 0.10 04Mar2018 4 a.m. 51.87 10.13 49.69 0.10 04Mar2018 5 a.m. 51.82 10.84 50.42 0.10 04Mar2018 6 a.m. 52.30 12.87 48.72 0.10 04Mar2018 7 a.m. 52.47 11.56 48.53 0.10 Accuml. Values 1332.52 250.59 1212.13 1085.41 Num. Valid Values 24 24 24 24 Avg. Values 55.52 10.44 50.51 45.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 13.07 403.20 50.51 93.32 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4949 definition: xcompl = 1 - (RELH_avg/100) TdC = 3.0176 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 = 0.5985 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4015 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.0206 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 = 7.4663 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.3225 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.147 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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