Detailed Weather Data for Project: ARCA

Date Time TAIR WSPD RELH SRAD 06Mar2018 8 a.m. 38.07 7.24 39.99 102.14 06Mar2018 9 a.m. 42.53 11.71 31.71 324.14 06Mar2018 10 a.m. 46.90 17.88 26.51 531.28 06Mar2018 11 a.m. 49.35 20.89 22.90 700.71 06Mar2018 12 p.m. 51.62 24.04 20.01 809.84 06Mar2018 1 p.m. 53.46 25.12 17.45 855.47 06Mar2018 2 p.m. 55.42 26.48 14.55 817.86 06Mar2018 3 p.m. 55.81 27.80 13.24 708.37 06Mar2018 4 p.m. 55.99 27.19 13.72 546.84 06Mar2018 5 p.m. 55.49 21.25 14.99 319.74 06Mar2018 6 p.m. 53.76 18.72 15.95 102.94 06Mar2018 7 p.m. 49.55 2.20 26.42 2.12 06Mar2018 8 p.m. 47.01 14.89 24.84 0.00 06Mar2018 9 p.m. 43.83 12.86 29.84 0.00 06Mar2018 10 p.m. 41.14 13.08 34.14 0.00 06Mar2018 11 p.m. 39.20 10.04 37.60 0.00 07Mar2018 12 a.m. 37.83 7.10 41.11 0.00 07Mar2018 1 a.m. 36.27 5.92 45.28 0.00 07Mar2018 2 a.m. 34.66 5.24 48.99 0.00 07Mar2018 3 a.m. 32.83 4.55 54.38 0.00 07Mar2018 4 a.m. 31.39 6.04 58.37 0.00 07Mar2018 5 a.m. 30.38 5.41 62.07 0.00 07Mar2018 6 a.m. 29.08 5.04 65.29 0.00 07Mar2018 7 a.m. 28.72 5.23 66.42 0.00 Accuml. Values 1040.30 325.92 825.77 5821.45 Num. Valid Values 24 24 24 24 Avg. Values 43.35 13.58 34.41 242.56 THE EMPERICAL EQUATIONS REQUIRE THESE PARAMETERS IN THESE UNITS: SRAD == CAL / SQUARE CENTIMETER WSPD == KILOMETERS PER DAY TAIR == DEGREES CELSIUS RELH == PERCENT Converted Values 6.30 524.41 34.41 500.53 Now start computations towards evaporation in inches per day Each intermediate calculation step will be shown. xcompl = 0.6559 definition: xcompl = 1 - (RELH_avg/100) TdC = -8.4043 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 = 0.5004 definition: del_lambda1 = pow(1+(0.66/pow(0.00815*TAIR_avg + 0.8912, 7)), -1) del_lambda2 = 0.4996 definition: del_lambda2 = 1 - del_lambda1 Qn = 4.5517 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 = 6.3352 definition: es_ea = 33.86 * (pow(0.00738*TAIR_avg + 0.8072, 8) -pow(0.00738*TdC+0.8072, 8)) Ea = 9.8519 definition: Ea = pow(es_ea, 0.88) * (0.42 + 0.0029*WSPD_avg) Daily Evap: 0.283 inches definition: Daily Evap = (del_lambda1*Qn + del_lambda2*Ea) / 25.4

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