Detailed Weather Data for Project: BIRC

Date Time TAIR WSPD RELH SRAD 02Jan2018 8 a.m. 11.30 2.29 53.17 1.90 02Jan2018 9 a.m. 11.80 2.68 52.76 36.74 02Jan2018 10 a.m. 12.96 2.43 51.55 153.33 02Jan2018 11 a.m. 15.53 0.98 47.95 216.45 02Jan2018 12 p.m. 17.04 1.30 46.03 260.56 02Jan2018 1 p.m. 18.84 1.79 43.21 267.60 02Jan2018 2 p.m. 21.38 2.36 38.35 465.92 02Jan2018 3 p.m. 23.85 3.50 34.82 440.63 02Jan2018 4 p.m. 24.48 2.48 32.56 214.07 02Jan2018 5 p.m. 23.27 2.88 36.76 44.96 02Jan2018 6 p.m. 22.69 3.11 38.96 3.13 02Jan2018 7 p.m. 29.05 2.25 46.80 0.10 02Jan2018 8 p.m. 21.58 4.05 42.07 0.11 02Jan2018 9 p.m. 19.31 3.75 45.74 0.11 02Jan2018 10 p.m. 17.44 3.34 48.99 0.11 02Jan2018 11 p.m. 17.33 3.60 54.32 0.11 03Jan2018 12 a.m. 16.30 4.16 52.78 0.11 03Jan2018 1 a.m. 15.67 4.54 53.72 0.11 03Jan2018 2 a.m. 15.66 5.24 53.17 0.11 03Jan2018 3 a.m. 15.93 4.54 52.60 0.11 03Jan2018 4 a.m. 16.21 4.82 54.76 0.11 03Jan2018 5 a.m. 15.55 4.42 55.70 0.11 03Jan2018 6 a.m. 15.01 3.80 57.09 0.11 03Jan2018 7 a.m. 14.40 3.12 58.85 0.11 Accuml. Values 432.57 77.43 1152.71 2106.71 Num. Valid Values 24 24 24 24 Avg. Values 18.02 3.23 48.03 87.78 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -7.76 124.58 48.03 181.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5197 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.9211 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 = 0.2877 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7123 definition: del_lambda2 = 1 - del_lambda1 Qn = 0.4561 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 = 1.7954 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.3076 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.042 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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