Drawdown (hydrology)
From Infogalactic: the planetary knowledge core
In water-related science and engineering there are two similar but distinct definitions in use for drawdown.
- In subsurface hydrogeology, drawdown is the change in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test.
- In surface water hydrology and civil engineering, drawdown refers to the lowering of the water level in a man-made reservoir or tank.
In either case, drawdown is the change in head or water level relative to background condition, indicating the difference in head which has occurred at a given location relative to an initial time at the same location.
A record of hydraulic head through time is more generally called a hydrograph (in both groundwater and surface water).
Effects
Aquifer drawdown or overdrafting and the pumping of fossil water may be a contributing factor to sea-level rise.[1]
Related
References
<templatestyles src="Reflist/styles.css" />
Cite error: Invalid <references>
tag; parameter "group" is allowed only.
<references />
, or <references group="..." />
- ↑ Lua error in package.lua at line 80: module 'strict' not found.