Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 41.97 7.96 26.72 0.17 06Mar2018 9 a.m. 44.20 10.34 25.81 0.14 06Mar2018 10 a.m. 46.80 10.03 22.53 0.10 06Mar2018 11 a.m. 49.57 10.12 19.24 0.10 06Mar2018 12 p.m. 52.48 12.22 15.82 0.11 06Mar2018 1 p.m. 53.78 13.41 12.86 0.11 06Mar2018 2 p.m. 53.85 12.73 12.59 0.11 06Mar2018 3 p.m. 53.53 12.35 13.45 0.10 06Mar2018 4 p.m. 52.79 12.50 15.22 0.11 06Mar2018 5 p.m. 49.15 9.74 23.99 0.11 06Mar2018 6 p.m. 44.44 9.02 32.72 0.12 06Mar2018 7 p.m. 46.67 1.95 20.62 0.11 06Mar2018 8 p.m. 38.34 6.61 38.07 0.11 06Mar2018 9 p.m. 36.91 5.53 40.96 0.10 06Mar2018 10 p.m. 35.20 5.60 43.73 0.10 06Mar2018 11 p.m. 33.42 3.90 48.87 0.11 07Mar2018 12 a.m. 31.37 2.82 55.34 0.11 07Mar2018 1 a.m. 31.01 3.71 56.48 0.11 07Mar2018 2 a.m. 30.40 4.01 58.48 0.10 07Mar2018 3 a.m. 29.19 4.76 61.90 0.11 07Mar2018 4 a.m. 28.08 2.87 65.41 0.11 07Mar2018 5 a.m. 26.91 1.80 68.92 0.12 07Mar2018 6 a.m. 25.47 2.74 74.77 0.11 07Mar2018 7 a.m. 24.58 1.56 77.05 2.94 Accuml. Values 960.11 168.28 931.55 5.52 Num. Valid Values 24 24 24 24 Avg. Values 40.00 7.01 38.81 0.23 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.45 270.76 38.81 0.47 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6119 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.4969 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 = 0.4721 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5279 definition: del_lambda2 = 1 - del_lambda1 Qn = -1.0158 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 = 5.1989 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.1412 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.088 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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