septic.sep

The septic systems database summarizes parameters used by the model to simulate different types of Onsite Wastewater Systems.

Information of water quality or effluent characteristics required to simulate different types of Onsite Wastewater Systems (OWSs) is stored in the septic water quality database. The information contained in the septic water quality database includes the septic tank effluent flow rate for per capita and the effluent characteristics of various septic systems. The database file distributed with SWAT+ includes water quality data for most conventional, advanced, and failing septic systems. It was developed based on the field data summarized by Siegrist et al. (2005), McCray et al. (2005), and OWTS 201 (2005).

Field	Description	Type	Unit	Default	Range
name	Name of the septic record	string	​n/a	​n/a	n/a
q_rate	Flow rate of the septic tank effluent	​real	m^3/d	0.0	0.0-1.0
bod	​7-day Biological Oxygen Demand of the septic tank effluent	​real	mg/l	​0.0	0.0-300.0
tss	Total suspended solids in the septic tank effluent	​real	​mg/l	​0.0	0.0-300.0
nh4_n	​Ammonium nitrogen in the septic tank effluent	​real	​mg/l	​0.0	​
no3_n	​Nitrate nitrogen in the septic tank effluent	​real	​mg/l	0.0
no2_n	Nitrite nitrogen in the septic tank effluent	real	mg/l	0.0
org_n	Organic nitrogen in the septic tank effluent	real	mg/l	0.0
min_p	Mineral phosphorus in the septic tank effluent	real	mg/l	0.0
org_p	Organic phosphorus in the septic tank effluent	real	mg/l	0.0
fcoli	Number of fecal coliform in the septic tank effluent	real	mg/l	0.0

References

Siegrist et al. (2005)

McCray et al. (2005)

OWTS 201 (2005)