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irrigation
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Irrigation
Artificial water supply for dry agricultural areas by means of dams and channels. Drawbacks are that it tends to concentrate salts at the surface, ultimately causing soil infertility, and that rich river silt is retained at dams, to the impoverishment of the land and fisheries below them.
Irrigation has been practised for thousands of years, in Eurasia as well as the Americas. An example is the channelling of the annual Nile flood in Egypt, which has been done from earliest times to its present control by the Aswan High Dam.
© RM 2009. Helicon Publishing is division of RM.
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channel efficiency
chlorofluorocarbon
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conservation
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crop rotation
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environmental issues
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incised meander
interlocking spur
irrigation
lake
land tenure
levee
ley
meander
misfit valley
monoculture
Montréal Protocol
nitrate pollution
nuclear waste
oxbow lake
ozone
ozone depleter
ozone layer
pesticide
playa
PM10
pollution
recycling
rejuvenation
river
river capture
river terrace
saltation (earth science)
sewage disposal
slash and burn
soil erosion
solution (earth science)
suspension (earth science)
V-shaped valley
valley
waste
water pollution
water-borne disease
waterfall
weedkiller
aerosol
Agent Orange
agribusiness
agriculture
air pollution
alluvium
arable farming
attrition
cash crop
catalytic converter
catch crop
channel efficiency
chlorofluorocarbon
common land
confluence
conglomerate (geology)
conservation
corrosion
crop (agriculture)
crop rotation
dam
deforestation
delta
deposition (earth science)
desertification
drainage basin
environmental issues
erosion
estuary
eutrophication
factory farming
farming
farming system
fertilizer
flood plain
flooding
flue-gas desulphurization
fossil fuel
global warming
gorge
green belt
green revolution
greenhouse effect
hazardous waste
headward erosion
hydraulic action
hydraulic radius
hydrograph
incised meander
interlocking spur
irrigation
lake
land tenure
levee
ley
meander
misfit valley
monoculture
Montréal Protocol
nitrate pollution
nuclear waste
oxbow lake
ozone
ozone depleter
ozone layer
pesticide
playa
PM10
pollution
recycling
rejuvenation
river
river capture
river terrace
saltation (earth science)
sewage disposal
slash and burn
soil erosion
solution (earth science)
suspension (earth science)
V-shaped valley
valley
waste
water pollution
water-borne disease
waterfall
weedkiller
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