Kostenloser Sewage Durchfluss Rechner
Schätzen Sie wastewater flow aus water demand mit return factor, peak factor, and infiltration allowance.
Average Sewage Flow
1,600 m^3/day
Average Sewage Flow vs Average Water Demand
Formel
## Sewage Flow Estimation Wastewater flow is derived from water consumption, reduced by a return factor. ### Formulas **Average sewage = Water demand x Return factor** **Peak sewage = Average x Peak factor x (1 + Infiltration)** The return factor (0.7-0.9) accounts for water consumed (irrigation, evaporation) that does not reach the sewer. The peak factor accounts for diurnal variation, and infiltration accounts for groundwater entering through pipe joints.
Lösungsbeispiel
2000 m^3/day water demand, 0.8 return factor, 2.5 peak factor, 10% infiltration.
- 01Average sewage = 2000 x 0.8 = 1600 m^3/day
- 02Peak sewage = 1600 x 2.5 x 1.10 = 4400 m^3/day
- 03Peak flow rate = 4400 / 86.4 = 50.9 L/s
Häufig Gestellte Fragen
What is the return factor?
The return factor (0.7-0.9) is the fraction of water supply that becomes wastewater. Arid regions with garden irrigation use 0.7. Cooler climates with less outdoor water use have 0.85-0.90. Industrial areas vary widely.
What causes peak flows in sewers?
Peak flows occur during morning and evening when residential water use is highest. The peak factor depends on population size: small communities may have peak/average ratios of 3-4, large cities 1.5-2.
What is infiltration and inflow (I/I)?
Infiltration is groundwater seeping through pipe joints and cracks. Inflow is stormwater entering through illegal connections, manhole covers, etc. Combined, I/I can add 15-50% to dry weather flow in older systems.
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