Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 04Dec2017 8 a.m. 65.12 18.47 81.72 0.01 04Dec2017 9 a.m. 65.98 19.45 79.31 49.07 04Dec2017 10 a.m. 66.94 26.92 73.92 220.44 04Dec2017 11 a.m. 67.24 26.42 70.17 349.48 04Dec2017 12 p.m. 67.66 24.75 66.25 475.58 04Dec2017 1 p.m. 68.18 22.23 61.45 454.77 04Dec2017 2 p.m. 70.03 17.73 50.38 289.67 04Dec2017 3 p.m. 71.87 17.13 36.89 322.32 04Dec2017 4 p.m. 68.07 18.53 33.68 136.34 04Dec2017 5 p.m. 63.30 13.87 35.81 22.58 04Dec2017 6 p.m. 62.01 13.77 21.87 0.26 04Dec2017 7 p.m. 39.52 4.44 45.09 0.00 04Dec2017 8 p.m. 57.31 11.20 24.43 0.00 04Dec2017 9 p.m. 54.46 15.47 31.04 0.00 04Dec2017 10 p.m. 50.05 17.55 32.80 0.00 04Dec2017 11 p.m. 46.18 15.11 36.54 0.00 05Dec2017 12 a.m. 43.59 16.17 36.08 0.00 05Dec2017 1 a.m. 42.01 13.24 34.75 0.00 05Dec2017 2 a.m. 40.80 12.79 27.27 0.00 05Dec2017 3 a.m. 38.68 10.77 24.12 0.00 05Dec2017 4 a.m. 36.91 10.62 23.65 0.00 05Dec2017 5 a.m. 35.78 10.98 24.92 0.00 05Dec2017 6 a.m. 34.83 9.04 28.97 0.00 05Dec2017 7 a.m. 33.42 8.92 32.98 0.00 Accuml. Values 1289.96 375.57 1014.09 2320.52 Num. Valid Values 24 24 24 24 Avg. Values 53.75 15.65 42.25 96.69 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 12.08 604.29 42.25 199.52 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5775 definition: xcompl = 1 - (RELH_avg/100) TdC = -0.4475 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 = 0.5849 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4151 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.1617 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 = 8.2058 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 13.8476 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.253 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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