Detailed Weather Data for Project: GSAL

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 40.06 16.90 44.72 87.10 06Mar2018 9 a.m. 41.54 19.70 41.36 339.90 06Mar2018 10 a.m. 47.14 18.10 28.42 567.80 06Mar2018 11 a.m. 51.22 20.40 21.85 744.70 06Mar2018 12 p.m. 53.24 23.60 17.89 850.20 06Mar2018 1 p.m. 54.21 24.90 16.20 878.40 06Mar2018 2 p.m. 55.09 23.80 15.81 780.70 06Mar2018 3 p.m. 54.88 23.20 16.89 660.30 06Mar2018 4 p.m. 54.50 23.30 15.03 505.60 06Mar2018 5 p.m. 53.42 24.30 13.40 336.80 06Mar2018 6 p.m. 51.37 23.20 15.34 128.30 06Mar2018 7 p.m. 51.51 2.40 20.21 8.40 06Mar2018 8 p.m. 43.86 14.80 32.12 0.00 06Mar2018 9 p.m. 41.45 11.60 36.12 0.00 06Mar2018 10 p.m. 39.54 9.40 39.94 0.00 06Mar2018 11 p.m. 37.31 5.50 44.27 0.00 07Mar2018 12 a.m. 35.15 4.50 48.64 0.00 07Mar2018 1 a.m. 34.02 5.00 51.82 0.00 07Mar2018 2 a.m. 31.93 5.00 57.72 0.00 07Mar2018 3 a.m. 30.34 5.30 64.43 0.00 07Mar2018 4 a.m. 28.96 5.90 68.95 0.00 07Mar2018 5 a.m. 27.39 5.50 71.82 0.00 07Mar2018 6 a.m. 25.88 5.20 74.21 0.00 07Mar2018 7 a.m. 24.75 4.50 76.19 0.00 Accuml. Values 1008.77 326.00 933.35 5888.20 Num. Valid Values 24 24 24 24 Avg. Values 42.03 13.58 38.89 245.34 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.57 524.53 38.89 506.27 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6111 definition: xcompl = 1 - (RELH_avg/100) TdC = -7.4587 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 = 0.4893 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5107 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5687 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 = 5.6141 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 8.8598 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.266 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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