Detailed Weather Data for Project: WIST

Date Time TAIR WSPD RELH SRAD 05Mar2018 8 a.m. 65.50 3.78 81.07 50.00 05Mar2018 9 a.m. 66.94 5.49 54.40 128.00 05Mar2018 10 a.m. 63.63 9.58 54.76 205.00 05Mar2018 11 a.m. 58.59 15.32 36.94 673.00 05Mar2018 12 p.m. 61.43 11.64 31.44 786.00 05Mar2018 1 p.m. 62.96 12.54 30.46 832.00 05Mar2018 2 p.m. 61.97 11.90 30.04 810.00 05Mar2018 3 p.m. 61.88 13.49 25.77 709.00 05Mar2018 4 p.m. 60.67 11.20 23.75 518.00 05Mar2018 5 p.m. 60.46 9.94 24.36 330.00 05Mar2018 6 p.m. 59.02 10.85 16.85 149.00 05Mar2018 7 p.m. 53.08 16.10 15.87 7.00 05Mar2018 8 p.m. 53.62 2.51 30.95 3.00 05Mar2018 9 p.m. 52.21 3.51 28.94 3.00 05Mar2018 10 p.m. 46.26 0.60 54.40 3.00 05Mar2018 11 p.m. 41.65 0.41 48.60 2.00 06Mar2018 12 a.m. 43.20 0.28 67.04 2.00 06Mar2018 1 a.m. 41.22 0.29 68.68 2.00 06Mar2018 2 a.m. 37.26 0.40 73.09 2.00 06Mar2018 3 a.m. 36.82 0.38 81.15 2.00 06Mar2018 4 a.m. 32.76 0.41 89.94 2.00 06Mar2018 5 a.m. 33.85 0.16 90.43 2.00 06Mar2018 6 a.m. 39.58 0.66 65.64 2.00 06Mar2018 7 a.m. 40.23 5.25 55.93 5.00 Accuml. Values 1234.76 146.69 1180.50 5227.00 Num. Valid Values 24 24 24 24 Avg. Values 51.45 6.11 49.19 217.79 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 10.80 236.02 49.19 449.42 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5081 definition: xcompl = 1 - (RELH_avg/100) TdC = 0.5426 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 = 0.5668 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4332 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.2291 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 = 6.6175 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.8259 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.194 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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