Detailed Weather Data for Project: SARD

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 12.16 9.20 71.42 16.40 01Jan2018 9 a.m. 11.95 14.50 71.22 192.20 01Jan2018 10 a.m. 12.94 11.90 69.81 385.60 01Jan2018 11 a.m. 14.34 11.10 64.52 507.70 01Jan2018 12 p.m. 16.57 10.00 59.74 576.80 01Jan2018 1 p.m. 18.36 10.60 54.68 590.70 01Jan2018 2 p.m. 20.26 11.50 50.48 544.00 01Jan2018 3 p.m. 21.74 11.90 46.27 426.90 01Jan2018 4 p.m. 23.04 9.40 43.13 263.80 01Jan2018 5 p.m. 22.87 9.70 40.93 40.40 01Jan2018 6 p.m. 22.23 12.50 42.96 0.00 01Jan2018 7 p.m. 23.97 8.50 42.47 0.00 01Jan2018 8 p.m. 19.85 10.10 47.58 0.00 01Jan2018 9 p.m. 17.53 0.70 46.19 0.00 01Jan2018 10 p.m. 16.30 2.20 50.98 0.00 01Jan2018 11 p.m. 16.16 1.90 50.99 0.00 02Jan2018 12 a.m. 16.38 1.10 51.09 0.00 02Jan2018 1 a.m. 14.67 2.30 56.73 0.00 02Jan2018 2 a.m. 12.69 2.90 65.14 0.00 02Jan2018 3 a.m. 10.36 3.00 75.58 0.00 02Jan2018 4 a.m. 11.82 3.30 68.17 0.00 02Jan2018 5 a.m. 11.17 1.90 73.48 0.00 02Jan2018 6 a.m. 12.18 0.50 71.97 0.00 02Jan2018 7 a.m. 13.19 1.60 69.28 0.00 Accuml. Values 392.74 162.30 1384.81 3544.50 Num. Valid Values 24 24 24 24 Avg. Values 16.36 6.76 57.70 147.69 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.69 261.14 57.70 304.76 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4230 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.5208 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 = 0.2748 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7252 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.5658 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 = 1.3539 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.5371 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.061 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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