Detailed Weather Data for Project: TENK

Date Time TAIR WSPD RELH SRAD 01Jan2018 8 a.m. 4.64 4.31 75.75 12.00 01Jan2018 9 a.m. 6.38 5.14 71.67 156.00 01Jan2018 10 a.m. 8.65 6.43 65.50 323.25 01Jan2018 11 a.m. 11.30 4.40 57.67 449.00 01Jan2018 12 p.m. 14.23 4.92 51.25 532.25 01Jan2018 1 p.m. 16.34 5.07 46.00 551.00 01Jan2018 2 p.m. 18.55 5.93 41.50 506.75 01Jan2018 3 p.m. 19.67 5.48 38.75 407.00 01Jan2018 4 p.m. 19.67 3.91 38.00 261.75 01Jan2018 5 p.m. 18.68 4.64 39.50 90.75 01Jan2018 6 p.m. 15.26 1.79 47.00 0.00 01Jan2018 7 p.m. 12.38 0.89 54.00 0.00 01Jan2018 8 p.m. 10.22 0.45 66.00 0.00 01Jan2018 9 p.m. 10.22 0.67 68.00 0.00 01Jan2018 10 p.m. 10.16 1.34 68.00 0.00 01Jan2018 11 p.m. 12.52 1.29 60.50 0.00 02Jan2018 12 a.m. 11.39 0.89 70.75 0.00 02Jan2018 1 a.m. 9.73 0.67 79.00 0.00 02Jan2018 2 a.m. 9.37 0.73 80.25 0.00 02Jan2018 3 a.m. 9.38 0.67 82.67 0.00 02Jan2018 4 a.m. 11.17 1.85 81.75 0.00 02Jan2018 5 a.m. 14.00 3.36 61.00 0.00 02Jan2018 6 a.m. 14.68 4.42 51.50 0.00 02Jan2018 7 a.m. 14.81 3.02 51.50 0.00 Accuml. Values 303.40 72.27 1447.51 3289.75 Num. Valid Values 24 24 24 24 Avg. Values 12.64 3.01 60.31 137.07 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values -10.75 116.28 60.31 282.85 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.3969 definition: xcompl = 1 - (RELH_avg/100) TdC = -16.9337 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 = 0.2468 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.7532 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.3104 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 = 1.0774 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 0.8086 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.037 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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