Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 43.41 5.37 56.36 124.00 06Mar2018 9 a.m. 47.35 3.38 37.97 360.00 06Mar2018 10 a.m. 51.76 9.17 22.59 566.00 06Mar2018 11 a.m. 53.40 12.23 19.17 727.00 06Mar2018 12 p.m. 54.84 10.92 15.57 829.00 06Mar2018 1 p.m. 56.17 13.82 18.93 867.00 06Mar2018 2 p.m. 56.82 13.20 15.39 837.00 06Mar2018 3 p.m. 58.24 15.84 16.67 742.00 06Mar2018 4 p.m. 57.27 15.72 15.45 582.00 06Mar2018 5 p.m. 57.04 17.03 15.14 366.00 06Mar2018 6 p.m. 54.84 17.27 16.61 121.00 06Mar2018 7 p.m. 45.61 4.40 40.60 7.00 06Mar2018 8 p.m. 47.91 14.72 31.50 2.00 06Mar2018 9 p.m. 43.95 10.90 35.90 2.00 06Mar2018 10 p.m. 41.54 10.99 40.42 2.00 06Mar2018 11 p.m. 39.90 10.48 41.46 2.00 07Mar2018 12 a.m. 38.59 10.14 44.88 2.00 07Mar2018 1 a.m. 36.93 7.91 49.27 2.00 07Mar2018 2 a.m. 35.38 7.54 52.87 2.00 07Mar2018 3 a.m. 34.52 6.89 57.15 2.00 07Mar2018 4 a.m. 33.64 6.78 58.92 1.00 07Mar2018 5 a.m. 32.63 5.70 61.72 2.00 07Mar2018 6 a.m. 31.64 4.71 63.19 2.00 07Mar2018 7 a.m. 31.98 6.48 66.06 4.00 Accuml. Values 1085.39 241.59 893.79 6153.00 Num. Valid Values 24 24 24 24 Avg. Values 45.22 10.07 37.24 256.38 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 7.35 388.72 37.24 529.03 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6276 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.4402 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 = 0.5161 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4839 definition: del_lambda2 = 1 - del_lambda1 Qn = 5.0171 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 = 6.5105 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.0455 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.255 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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