Evaluation of Septic Tank and Subsurface Wetland for
Evaluation of Septic Tank and Subsurface Wetland for
Evaluation of Septic Tank and Subsurface Wetland for
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Appendix 8 - Evapotranspiration Determination<br />
ET = Precipitation + Influent ± Change in Storage – Effluent<br />
Retrieve<br />
Precip. Precip. Influent* Storage (m 3 ) Effluent ET ET<br />
(m 3 /wk) (gal/ft 2 /wk) (m 3 /wk) S 1 S 2 ΔS (m 3 ) (m 3 /d) (USG/ft 2 /d)<br />
1.06 0.81 0.61 3.43 2.81 -0.62 0.00 0.33 0.25<br />
1.47 1.12 0.61 2.81 2.81 0.00 0.00 0.30 0.23<br />
*Influent volume based on reported daily bucket use<br />
AVG = 0.31 0.24<br />
Pisgah<br />
Precip. Precip. Influent Storage (m 3 ) Effluent ET ET<br />
(m 3 /wk) (gal/ft 2 /wk) (m 3 /wk) S 1 S 2 ΔS (m 3 ) (m 3 /d) (USG/ft 2 /d)<br />
7.20 2.04 2.93 2.59 4.83 2.24 0.00 0.99 0.27<br />
12.12 3.30 7.93 6.29 8.02 1.72 0.00 2.62 0.71<br />
6.40 1.74 2.38 8.02 5.86 -2.16 0.00 1.56 0.43<br />
7.55 2.06 1.61 5.86 6.12 0.26 0.00 1.27 0.35<br />
3.20 0.87 2.08 6.12 6.12 0.00 0.00 0.75 0.21<br />
5.49 1.50 2.22 6.12 7.24 1.12 0.00 0.94 0.26<br />
0.00 0.00 2.18 7.24 4.57 -2.67 0.00 0.69 0.19<br />
0.00 0.00 1.50 4.57 2.41 -2.16 0.00 0.52 0.14<br />
0.23 0.06 0.88 2.41 0.43 -1.98 0.00 0.44 0.12<br />
0.00 0.00 1.91 0.43 0.43 0.00 0.00 0.27 0.07<br />
72<br />
AVG 1.01 0.27