Detailed Weather Data for Project: THUN

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 37.67 8.39 49.50 116.75 06Mar2018 9 a.m. 45.44 13.35 33.67 323.33 06Mar2018 10 a.m. 51.53 20.86 23.25 535.25 06Mar2018 11 a.m. 53.66 22.44 20.00 688.33 06Mar2018 12 p.m. 55.80 23.26 19.00 796.25 06Mar2018 1 p.m. 58.16 24.61 17.00 834.33 06Mar2018 2 p.m. 59.40 26.79 15.00 809.00 06Mar2018 3 p.m. 60.39 25.39 13.50 710.75 06Mar2018 4 p.m. 59.49 28.13 14.00 548.50 06Mar2018 5 p.m. 58.28 26.17 15.00 336.50 06Mar2018 6 p.m. 54.14 26.40 18.00 48.00 06Mar2018 7 p.m. 51.26 19.91 19.00 0.00 06Mar2018 8 p.m. 48.92 19.68 19.00 0.00 06Mar2018 9 p.m. 45.77 16.11 28.00 0.00 06Mar2018 10 p.m. 42.92 19.39 34.33 0.00 06Mar2018 11 p.m. 40.68 17.11 37.75 0.00 07Mar2018 12 a.m. 38.84 14.32 41.50 0.00 07Mar2018 1 a.m. 37.31 13.65 45.50 0.00 07Mar2018 2 a.m. 35.28 9.90 50.00 0.00 07Mar2018 3 a.m. 34.88 11.86 51.33 0.00 07Mar2018 4 a.m. 33.66 12.36 54.75 0.00 07Mar2018 5 a.m. 32.27 11.41 58.00 0.00 07Mar2018 6 a.m. 30.25 6.38 63.75 0.00 07Mar2018 7 a.m. 30.56 9.62 63.00 5.00 Accuml. Values 1096.56 427.49 803.83 5751.99 Num. Valid Values 24 24 24 24 Avg. Values 45.69 17.81 33.49 239.67 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.61 687.83 33.49 494.56 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6651 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.5999 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 = 0.5200 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4800 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5773 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 = 7.0193 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 13.4154 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.347 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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