Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 31Dec2017 8 a.m. 20.46 11.91 87.20 2.00 31Dec2017 9 a.m. 18.81 14.10 86.97 4.00 31Dec2017 10 a.m. 18.25 12.59 76.39 20.00 31Dec2017 11 a.m. 18.81 14.02 69.93 81.00 31Dec2017 12 p.m. 19.69 13.52 63.45 147.00 31Dec2017 1 p.m. 20.23 13.77 58.19 199.00 31Dec2017 2 p.m. 21.00 16.71 59.97 234.00 31Dec2017 3 p.m. 20.79 11.83 55.45 194.00 31Dec2017 4 p.m. 22.55 13.21 52.76 135.00 31Dec2017 5 p.m. 22.77 10.58 48.24 118.00 31Dec2017 6 p.m. 20.57 11.58 47.26 46.00 31Dec2017 7 p.m. 19.24 3.63 39.81 0.00 31Dec2017 8 p.m. 16.93 8.27 47.51 0.00 31Dec2017 9 p.m. 15.62 7.36 49.58 0.00 31Dec2017 10 p.m. 14.07 7.23 54.16 0.00 31Dec2017 11 p.m. 13.64 7.30 49.95 0.00 01Jan2018 12 a.m. 13.21 7.76 48.74 0.00 01Jan2018 1 a.m. 12.87 8.64 47.57 0.00 01Jan2018 2 a.m. 11.66 7.81 51.42 0.00 01Jan2018 3 a.m. 10.80 7.75 55.21 0.00 01Jan2018 4 a.m. 9.36 8.06 59.30 0.00 01Jan2018 5 a.m. 8.04 6.55 62.16 0.00 01Jan2018 6 a.m. 8.04 6.76 60.83 0.00 01Jan2018 7 a.m. 7.59 6.39 62.66 0.00 Accuml. Values 384.98 237.33 1394.71 1180.00 Num. Valid Values 24 24 24 24 Avg. Values 16.04 9.89 58.11 49.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -8.87 381.86 58.11 101.46 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.4189 definition: xcompl = 1 - (RELH_avg/100) TdC = -15.6024 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 = 0.2724 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7276 definition: del_lambda2 = 1 - del_lambda1 Qn = -0.2294 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 = 1.3217 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 1.9524 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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