Detailed Weather Data for Project: CHOU

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 39.42 3.30 44.70 81.30 06Mar2018 9 a.m. 44.76 8.20 36.35 290.90 06Mar2018 10 a.m. 48.90 11.80 28.39 495.50 06Mar2018 11 a.m. 52.09 13.70 23.08 667.40 06Mar2018 12 p.m. 54.16 15.00 20.17 786.50 06Mar2018 1 p.m. 55.20 18.60 19.16 839.90 06Mar2018 2 p.m. 57.00 17.80 16.98 822.00 06Mar2018 3 p.m. 57.27 19.60 15.72 698.80 06Mar2018 4 p.m. 56.34 18.20 16.58 508.80 06Mar2018 5 p.m. 55.13 19.60 17.33 319.90 06Mar2018 6 p.m. 50.81 17.70 28.33 96.70 06Mar2018 7 p.m. 47.89 3.10 33.62 1.80 06Mar2018 8 p.m. 42.06 13.10 43.17 0.00 06Mar2018 9 p.m. 40.03 12.20 44.76 0.00 06Mar2018 10 p.m. 38.52 9.80 47.44 0.00 06Mar2018 11 p.m. 37.33 10.50 49.85 0.00 07Mar2018 12 a.m. 35.56 8.20 53.87 0.00 07Mar2018 1 a.m. 34.52 7.20 55.63 0.00 07Mar2018 2 a.m. 34.03 7.30 57.99 0.00 07Mar2018 3 a.m. 32.90 7.50 60.93 0.00 07Mar2018 4 a.m. 31.66 6.80 63.61 0.00 07Mar2018 5 a.m. 31.21 7.50 66.64 0.00 07Mar2018 6 a.m. 30.06 6.20 68.83 0.00 07Mar2018 7 a.m. 29.79 6.30 71.54 0.00 Accuml. Values 1036.63 269.20 984.67 5609.50 Num. Valid Values 24 24 24 24 Avg. Values 43.19 11.22 41.03 233.73 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.22 433.14 41.03 482.30 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5897 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.1652 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 = 0.4991 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5009 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.3077 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 = 5.6617 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.7072 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.237 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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