Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 41.22 3.39 40.05 128.13 06Mar2018 9 a.m. 44.87 4.82 35.53 331.36 06Mar2018 10 a.m. 49.19 12.51 23.70 513.95 06Mar2018 11 a.m. 51.26 16.10 19.82 653.32 06Mar2018 12 p.m. 52.70 17.97 18.76 751.01 06Mar2018 1 p.m. 54.84 19.57 16.14 773.59 06Mar2018 2 p.m. 54.73 18.83 17.50 724.52 06Mar2018 3 p.m. 54.70 19.25 17.74 554.22 06Mar2018 4 p.m. 51.82 21.67 27.57 488.53 06Mar2018 5 p.m. 48.58 22.69 35.59 251.07 06Mar2018 6 p.m. 44.20 22.82 43.53 55.46 06Mar2018 7 p.m. 48.04 5.87 25.68 0.00 06Mar2018 8 p.m. 39.88 11.50 45.91 0.00 06Mar2018 9 p.m. 38.66 10.32 47.92 0.00 06Mar2018 10 p.m. 37.99 15.04 52.07 0.00 06Mar2018 11 p.m. 36.18 9.11 54.40 0.00 07Mar2018 12 a.m. 35.20 9.05 57.83 0.00 07Mar2018 1 a.m. 35.38 9.69 60.80 0.00 07Mar2018 2 a.m. 33.01 6.23 60.86 0.00 07Mar2018 3 a.m. 31.87 6.62 64.53 0.00 07Mar2018 4 a.m. 33.17 8.24 65.04 0.00 07Mar2018 5 a.m. 33.33 6.63 64.23 0.00 07Mar2018 6 a.m. 33.15 6.07 65.23 0.00 07Mar2018 7 a.m. 33.44 7.42 64.81 0.00 Accuml. Values 1017.43 291.41 1025.24 5225.16 Num. Valid Values 24 24 24 24 Avg. Values 42.39 12.14 42.72 217.71 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 5.77 468.88 42.72 449.26 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5728 definition: xcompl = 1 - (RELH_avg/100) TdC = -6.0260 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 = 0.4923 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5077 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.8528 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 = 5.3317 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 7.7625 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.230 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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