Detailed Weather Data for Project: TRUS

Date Time TAIR WSPD RELH SRAD 29Dec2017 8 a.m. 35.73 15.00 83.54 2.00 29Dec2017 9 a.m. 35.51 14.92 85.25 10.00 29Dec2017 10 a.m. 36.39 17.24 84.27 49.00 29Dec2017 11 a.m. 38.16 14.68 83.90 62.00 29Dec2017 12 p.m. 40.35 16.69 78.53 151.00 29Dec2017 1 p.m. 44.85 12.67 70.22 444.00 29Dec2017 2 p.m. 47.80 16.74 63.32 555.00 29Dec2017 3 p.m. 50.68 20.01 59.72 581.00 29Dec2017 4 p.m. 53.85 16.93 52.75 452.00 29Dec2017 5 p.m. 55.18 10.90 51.84 278.00 29Dec2017 6 p.m. 52.21 8.71 57.52 75.00 29Dec2017 7 p.m. 23.41 5.68 90.67 2.00 29Dec2017 8 p.m. 46.04 9.86 78.14 0.00 29Dec2017 9 p.m. 42.12 4.89 86.47 1.00 29Dec2017 10 p.m. 40.68 5.95 91.16 1.00 29Dec2017 11 p.m. 35.40 4.85 96.23 1.00 30Dec2017 12 a.m. 36.50 7.09 98.85 1.00 30Dec2017 1 a.m. 37.27 6.01 99.96 1.00 30Dec2017 2 a.m. 37.60 5.28 100.44 2.00 30Dec2017 3 a.m. 37.04 6.71 100.44 2.00 30Dec2017 4 a.m. 37.92 8.82 100.38 2.00 30Dec2017 5 a.m. 38.14 7.62 100.44 2.00 30Dec2017 6 a.m. 31.33 16.03 100.39 2.00 30Dec2017 7 a.m. 29.35 12.22 99.41 2.00 Accuml. Values 963.53 265.50 2013.84 2678.00 Num. Valid Values 24 24 24 24 Avg. Values 40.15 11.06 83.91 111.58 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.53 427.19 83.91 230.25 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.1609 definition: xcompl = 1 - (RELH_avg/100) TdC = 2.0345 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 = 0.4733 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5267 definition: del_lambda2 = 1 - del_lambda1 Qn = 1.2352 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 = 1.3690 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 2.1870 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.068 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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