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CALHYDRA Help
CALHYDRA Help
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Index
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  2. Glossary

  3. Waste water

  4. Rainwater runoff
  • Glossary

    • Drinking water

    • Waste water

      • Runoff coefficient
      • Discharge coefficient
      • Drainage area
      • Drop shaft
      • Wastewater
      • Wastewater treatment plant
      • Wastewater lifting unit
      • Wastewater lifting unit for faecal-free wastewater
      • Wastewater lifting unit for wastewater containing faeces
      • Wastewater lifting unit for limited use
      • Sewage collection pit
      • Branch
      • Branch with inner radius
      • Start-up condition
      • Connection sewer
      • Connection pipe
      • Connection pipes/bends
      • Connected load
      • Outer diameter
      • Outer diameter of the insulation
      • Aeration valve
      • Calculated rainfall rate
      • Reference storey
      • Flush floor connection
      • Floor drain
      • Insulation layer thickness
      • Insulating material
      • Permanent discharge
      • Ceiling thickness
      • Direct secondary ventilation
      • Throttle discharge
      • Pressure pipe of a sewage lifting station
      • Average daily wastewater discharge
      • Individual connection pipe
      • Drainage system
      • Drainage objects
      • Difficulty factor density
      • Aggravating factor rinsing and cleaning agents
      • Temperature as an aggravating factor
      • Downpipe
      • Downpipe distortion
      • Head of a sewage lifting unit
      • Flow rate of a sewage lifting unit
      • Gravity flow
      • Degree of filling
      • Floor structure
      • Total head
      • Odour trap
      • Odour trap height
      • Total wastewater discharge
      • Storey width
      • Storey height
      • Trade
      • Simultaneity
      • Grey water
      • Base pipe
      • Property drainage system
      • Domestic wastewater
      • Main ventilation
      • House connection
      • Indirect secondary ventilation
      • Industrial wastewater
      • Actual discharge
      • Century event
      • Types of ventilation in building drainage
      • Ventilation pipes
      • Ventilation pipe
      • Maximum wastewater discharge
      • Minimum inside diameter
      • Combined sewer pipes
      • Combined system
      • Nominal size
      • Nominal diameter
      • Nominal diameter
      • Emergency drain
      • Emergency drainage
      • Emergency overflow
      • Useful volume
      • Top edge of finished floor
      • Top edge of unfinished floor
      • Roof drainage system operated at full capacity according to plan
      • Pump flow rate
      • Rainwater
      • Rainwater runoff
      • Rainwater downpipe
      • Pipe type
      • Pipe sequence
      • Pipe inside diameter
      • Pipe roughness
      • Backwater level
      • Backflow loop
      • Collective connection pipe
      • Collective main ventilation
      • Collecting pipe
      • Wastewater discharge
      • Wastewater downpipe
      • Black water
      • Target discharge
      • Target discharge for emergency drainage
      • Specific heat loss
      • Shock load factor
      • Section number
      • Section type
      • Separation system
      • Flood height
      • Lower edge of the bare ceiling
      • Bypass pipe
      • Bypass ventilation
      • Venting
      • Underpressure roof drainage
      • Valve
      • Connecting pipe
      • Wall thickness (pipe)
      • Material
      • Permissible wastewater discharge
      • Retained rainwater volume
    • Heating

Rainwater runoff

The rainwater runoff is made up of the calculated rainfall in (l/(s*ha)), the peak runoff coefficient and the precipitation area in m².

Symbol or abbreviation:

Qr

Usual unit:

l/s

Equation:
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