Inflow
Contents |
[edit] Introduction
As it relates to water, inflow can be defined as the water that enters another body of water. Inflow can be caused by flooding, surface water inflow and gains from groundwater. The opposite of inflow is outflow.
Inflow is typically associated with rivers which may have multiple inflow sources - typically with a single source acting as the predominant one. Inflow control measures (by way of pumps, valves or other devices) may be adopted to ensure that water levels do not exceed certain levels.
[edit] Calculation method
The term inflow can also be used to describe the average volume of incoming water - based on time elapsed. According to a 1978 Journal of Hydrology article by D. J. Gilbert, ‘Calculating lake inflow (note)’, "For small lakes it is not feasible to measure more than a small fraction of the inflow directly. The inflow, defined as gross inflow less surface evaporation and groundwater losses, can be obtained from the conservation of volume equation"
INFLOW = OUTFLOW + (LEVEL CHANGE) x AREA / (TIME STEP)
[edit] Other applications of the term
Other subject areas associated with the term inflow include finance/investment (as in cash flow), fire protection systems (as in airflow), availability of personnel (as in the movement of a large number of people) and dispersal of building materials other than water.
[edit] Related articles
- Groundwater control in urban areas.
- Hydrology.
- Hydropower.
- Sinkholes.
- Rain garden.
- River engineering.
- Tunnelling.
[edit] External resources
- DJ Gilbert, Journal of Hydrology, Calculating lake inflow (note).
Featured articles and news
The UK’s largest air pollution campaign.
Future Homes Standard, now includes solar, but what else?
Will the new standard, due to in the Autumn, go far enough in terms of performance ?
BSRIA Briefing: Cleaner Air, Better tomorrow
A look back at issues relating to inside and outside air quality, discussed during the BSRIA briefing in 2023.
Restoring Abbotsford's hothouse
Bringing the writer Walter Scott's garden to life.
Reflections on the spending review with CIAT.
Retired firefighter cycles world to raise Grenfell funds
Leaving on 14 June 2025 Stephen will raise money for youth and schools through the Grenfell Foundation.
Key points for construction at a glance with industry reactions.
Functionality, visibility and sustainability
The simpler approach to specification.
Architects, architecture, buildings, and inspiration in film
The close ties between makers and the movies, with our long list of suggested viewing.
SELECT three-point plan for action issued to MSPs
Call for Scottish regulation, green skills and recognition of electrotechnical industry as part of a manifesto for Scottish Parliamentary elections.
UCEM becomes the University of the Built Environment
Major milestone in its 106-year history, follows recent merger with London School of Architecture (LSE).
Professional practical experience for Architects in training
The long process to transform the nature of education and professional practical experience in the Architecture profession following recent reports.
A people-first approach to retrofit
Moving away from the destructive paradigm of fabric-first.
International Electrician Day, 10 June 2025
Celebrating the role of electrical engineers from André-Marie Amperè, today and for the future.
New guide for clients launched at Houses of Parliament
'There has never been a more important time for clients to step up and ...ask the right questions'
The impact of recycled slate tiles
Innovation across the decades.
EPC changes for existing buildings
Changes and their context as the new RdSAP methodology comes into use from 15 June.