Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 3.13 4.82 69.68 2.17 01Jan2018 9 a.m. 3.69 6.95 69.41 131.37 01Jan2018 10 a.m. 5.47 8.07 63.13 322.97 01Jan2018 11 a.m. 7.99 6.85 57.19 480.72 01Jan2018 12 p.m. 10.42 6.91 50.17 582.70 01Jan2018 1 p.m. 12.87 6.21 43.97 615.92 01Jan2018 2 p.m. 14.36 7.28 39.93 581.69 01Jan2018 3 p.m. 16.21 9.15 37.25 487.95 01Jan2018 4 p.m. 16.95 8.07 35.10 314.10 01Jan2018 5 p.m. 17.28 7.14 36.05 118.03 01Jan2018 6 p.m. 16.11 6.60 39.11 3.49 01Jan2018 7 p.m. 19.13 5.91 47.59 0.00 01Jan2018 8 p.m. 12.85 4.76 48.21 0.00 01Jan2018 9 p.m. 11.86 6.63 51.36 0.00 01Jan2018 10 p.m. 11.25 6.17 52.99 0.00 01Jan2018 11 p.m. 10.72 5.30 55.09 0.00 02Jan2018 12 a.m. 10.09 3.41 58.49 0.00 02Jan2018 1 a.m. 9.75 4.24 60.80 0.00 02Jan2018 2 a.m. 9.79 3.51 61.61 0.00 02Jan2018 3 a.m. 10.63 3.45 61.91 0.00 02Jan2018 4 a.m. 11.61 5.63 57.50 0.00 02Jan2018 5 a.m. 11.77 5.03 57.01 0.00 02Jan2018 6 a.m. 11.66 5.24 57.57 0.00 02Jan2018 7 a.m. 11.57 3.66 58.29 0.00 Accuml. Values 277.14 140.99 1269.41 3641.11 Num. Valid Values 24 24 24 24 Avg. Values 11.55 5.87 52.89 151.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -11.36 226.85 52.89 313.06 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4711 definition: xcompl = 1 - (RELH_avg/100) TdC = -19.0893 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 = 0.2389 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7611 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5743 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 = 1.2221 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.2859 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.053 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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