Detailed Weather Data for Project: PATM

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 34.18 7.40 34.09 88.40 07Mar2018 9 a.m. 36.63 10.50 31.27 318.90 07Mar2018 10 a.m. 38.95 10.60 28.05 559.10 07Mar2018 11 a.m. 41.47 10.20 25.65 726.90 07Mar2018 12 p.m. 44.55 10.40 21.31 847.20 07Mar2018 1 p.m. 47.19 11.50 20.33 873.50 07Mar2018 2 p.m. 49.80 10.40 17.04 839.80 07Mar2018 3 p.m. 51.98 10.20 15.35 741.70 07Mar2018 4 p.m. 52.63 9.20 14.13 582.30 07Mar2018 5 p.m. 52.72 9.00 13.53 376.60 07Mar2018 6 p.m. 51.91 7.90 13.87 126.00 07Mar2018 7 p.m. 59.61 4.40 14.92 4.00 07Mar2018 8 p.m. 48.15 0.60 19.34 0.00 07Mar2018 9 p.m. 45.03 0.80 26.27 0.00 07Mar2018 10 p.m. 43.92 0.80 30.72 0.00 07Mar2018 11 p.m. 42.06 1.20 38.73 0.00 08Mar2018 12 a.m. 40.17 2.20 48.06 0.00 08Mar2018 1 a.m. 39.70 3.20 61.72 0.00 08Mar2018 2 a.m. 39.02 3.10 61.83 0.00 08Mar2018 3 a.m. 38.73 3.00 51.57 0.00 08Mar2018 4 a.m. 38.30 2.80 54.02 0.00 08Mar2018 5 a.m. 35.73 1.90 61.73 0.00 08Mar2018 6 a.m. 32.54 3.10 70.19 0.00 08Mar2018 7 a.m. 32.02 2.20 63.53 0.00 Accuml. Values 1036.97 136.60 837.25 6084.40 Num. Valid Values 24 24 24 24 Avg. Values 43.21 5.69 34.89 253.52 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.23 219.79 34.89 523.14 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6511 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.2944 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 = 0.4992 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5008 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.8436 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 = 6.2562 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 5.3087 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.200 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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