Edit Septic Data
What is it?
This interface allows users to modify HRU level onsite wastewater systems data.How to use it:
Subbasin number, land use, soil, slope and HRU number of the HRU currently being edited are displayed on the top.
Septic parameters
Parameter description:ISEP_TYP : The type of septic system.
1: Generic type conventional system.
2: Generic type advanced system.
3: Septic tank with conventional drainfield.
4: Septic tank with sand absorption (SAS) type 1.
5: Septic tank with sand absorption type 2.
6: Septic tank within-tank N removal and SAS.
7: Septic tank with effluent N removal recycle.
8: Septic tank with corrugated plastic trickling filter.
9: Septic tank with open-cell form trickling filter.
10: Single pass sand filter 1.
11: Single pass sand filter 2.
12: Single pass sand filter 3.
13: Single pass sand filter 4.
14: At grade recirculating sand filter.
15: Maryland style recirculating sand filter (RSF).
16: RSF.
17: Septic tank with constructed wetland and surface water discharge.
18: Municipal wastewater with constructed wetland and surface water discharge 1.
19: Municipal wastewater with constructed wetland and surface water discharge 2.
20: Municipal wastewater with constructed wetland.
21: Municipal wastewater with lagoon and constructed wetland.
22: Waterloo biofilter (plastic media) 1.
23: Waterloo biofilter (plastic media) 2.
24: Peat biofilter.
25: Recirculating textile filter.
26: Foam or textile filter effluent.
27: Septic, recirculating gravel filter, UV disinfection.
28: Untreated effluent-Texas A&M reference.
ISEP_IYR : Year the septic system began operation.
ISEP_OPT : 1=active, 2=failing, 0=non-septic.
SEP_CAP : Average number of permanent residents in a house.
BZ_AREA : Surface area of drainfield (m2).
ISEP_TFAIL : Time until failing system gets fixed, days.
BZ_Z : Depth to the top of biozone layer (mm).
BZ_THK : Thickness of biozone layer (mm).
SEP_STRM_DIST : Distance to the stream from the septic HRU (km).
SEP_DEN : Number of septic systems per square kilometer.
BIO_BD : Density of biomass (kg/m3).
COEFF_FC1 : Field capacity coefficient 1, unitless.
COEFF_FC2 : Field capacity coefficient 2, unitless .
COEFF_BOD_DC : BOD decay rate coefficient (m3/d).
COEFF_BOD_CONV : Gram of bacterial growth/gram of BOD (g/g).
COEFF_FECAL : F. coli bacteria decay rate coefficient (m3/d).
COEFF_PLQ : Conversion factor for plaque from TDS.
COEFF_MRT : Mortality rate coefficient.
COEFF_RSP : Respiration rate coefficient.
COEFF_SLG1 : Sloughing coefficient 1.
COEFF_SLG2 : Sloughing coefficient 2.
COEFF_NITR : Nitrification rate coefficient.
COEFF_DENITR : Denitrification rate coefficient.
COEFF_COEFF_PDISTRB : Linear P sorption distribution coefficient (L/kg).
COEFF_PSORPMAX : Maximum P sorption capacity of soil (mg P/kg).
COEFF_SOLPSLP : Slope in the effluent soluble P equation.
COEFF_SOLPINTC : Intercept in the effluent soluble P equation.
Applying the changes
Under 'Extend parameter edits', check 'Extend ALL SEP parameters' to apply all the current septic parameters. To only apply the parameters that have been updated, leave it unchecked.To apply the changes to current HRU only, check 'Extend edits to current HRU'.
To apply the changes to all HRUs, check 'Extend edits to ALL HRUs'.
To apply the changes to selected HRUs, including the current one, check 'Extend edits to selected HRUs' and select the subbasins from the list on the right. Next, select the landuses, soils and slopes to apply the changes.
Click 'Save Edits' and close the interface.
Don't forget to click 'Save Edits' butoon on the 'mgnSWAT Edit SWAT Data' interface.