Detailed Weather Data for Project: PENS

Date Time TAIR WSPD RELH SRAD 07Mar2018 8 a.m. 33.85 11.18 64.33 35.65 07Mar2018 9 a.m. 34.20 11.18 62.94 108.69 07Mar2018 10 a.m. 34.88 8.46 59.96 337.83 07Mar2018 11 a.m. 36.79 8.57 54.04 609.43 07Mar2018 12 p.m. 38.88 7.98 48.43 765.52 07Mar2018 1 p.m. 41.14 9.46 45.28 767.20 07Mar2018 2 p.m. 43.48 9.53 40.10 755.58 07Mar2018 3 p.m. 46.13 9.46 36.72 654.95 07Mar2018 4 p.m. 48.47 9.10 32.22 503.44 07Mar2018 5 p.m. 50.04 9.16 26.18 313.27 07Mar2018 6 p.m. 49.87 10.06 23.57 94.52 07Mar2018 7 p.m. 51.22 0.41 36.46 0.51 07Mar2018 8 p.m. 46.18 3.31 28.00 0.00 07Mar2018 9 p.m. 44.22 0.95 35.05 0.00 07Mar2018 10 p.m. 40.10 1.61 54.29 0.00 07Mar2018 11 p.m. 37.94 1.80 56.31 0.00 08Mar2018 12 a.m. 36.39 0.91 62.05 0.00 08Mar2018 1 a.m. 35.11 1.64 62.39 0.00 08Mar2018 2 a.m. 36.70 2.82 56.52 0.00 08Mar2018 3 a.m. 36.99 3.35 52.67 0.00 08Mar2018 4 a.m. 34.29 1.75 65.59 0.00 08Mar2018 5 a.m. 36.07 6.14 53.70 0.00 08Mar2018 6 a.m. 34.68 5.35 60.19 0.00 08Mar2018 7 a.m. 33.33 3.97 66.59 1.61 Accuml. Values 960.96 138.15 1183.58 4948.20 Num. Valid Values 24 24 24 24 Avg. Values 40.04 5.76 49.32 206.17 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 4.47 222.28 49.32 425.45 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.5068 definition: xcompl = 1 - (RELH_avg/100) TdC = -5.2789 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 = 0.4724 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.5276 definition: del_lambda2 = 1 - del_lambda1 Qn = 3.4688 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 = 4.2978 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 3.8411 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.144 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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