Detailed Weather Data for Project: FOSS

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 31.51 2.74 40.00 96.25 06Mar2018 9 a.m. 41.72 10.81 27.67 301.00 06Mar2018 10 a.m. 49.68 17.28 19.75 514.75 06Mar2018 11 a.m. 53.78 21.70 15.33 677.33 06Mar2018 12 p.m. 55.98 27.01 12.25 796.75 06Mar2018 1 p.m. 57.74 27.22 10.67 832.00 06Mar2018 2 p.m. 59.36 25.33 8.75 826.00 06Mar2018 3 p.m. 59.76 27.29 9.50 736.75 06Mar2018 4 p.m. 59.22 27.63 10.50 588.00 06Mar2018 5 p.m. 57.65 27.51 11.75 381.50 06Mar2018 6 p.m. 54.14 23.93 14.00 89.00 06Mar2018 7 p.m. 50.54 20.13 17.00 0.00 06Mar2018 8 p.m. 46.94 12.30 20.00 0.00 06Mar2018 9 p.m. 45.50 12.30 20.50 0.00 06Mar2018 10 p.m. 41.96 9.39 22.00 0.00 06Mar2018 11 p.m. 35.06 8.44 29.00 0.00 07Mar2018 12 a.m. 31.91 7.72 34.25 0.00 07Mar2018 1 a.m. 29.98 6.32 38.50 0.00 07Mar2018 2 a.m. 26.20 6.21 44.50 0.00 07Mar2018 3 a.m. 24.26 7.46 50.33 0.00 07Mar2018 4 a.m. 24.08 7.27 51.00 0.00 07Mar2018 5 a.m. 23.81 6.82 51.50 0.00 07Mar2018 6 a.m. 22.82 6.10 54.00 0.00 07Mar2018 7 a.m. 22.73 5.59 54.00 2.00 Accuml. Values 1006.33 354.50 666.75 5841.33 Num. Valid Values 24 24 24 24 Avg. Values 41.93 14.77 27.78 243.39 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.52 570.39 27.78 502.24 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.7222 definition: xcompl = 1 - (RELH_avg/100) TdC = -11.7811 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 = 0.4884 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5116 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5119 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 = 6.5947 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 10.9075 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.306 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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