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Waterlogging and Salinity

Waterlogging and salinity affect a significant portion of irrigated land in Pakistan, reducing crop yields. They are caused by factors like high water tables, hot dry climate, heavy rainfall, and poor irrigation practices. Potential remedies include pumping groundwater, planting trees to remove excess water through transpiration, afforestation with salt-tolerant varieties, lining canals to control seepage, and quickly removing rainwater to prevent rising water tables. The document also briefly mentions acid rain, ozone depletion, and global warming as additional environmental issues.

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Unza Waqar
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53 views25 pages

Waterlogging and Salinity

Waterlogging and salinity affect a significant portion of irrigated land in Pakistan, reducing crop yields. They are caused by factors like high water tables, hot dry climate, heavy rainfall, and poor irrigation practices. Potential remedies include pumping groundwater, planting trees to remove excess water through transpiration, afforestation with salt-tolerant varieties, lining canals to control seepage, and quickly removing rainwater to prevent rising water tables. The document also briefly mentions acid rain, ozone depletion, and global warming as additional environmental issues.

Uploaded by

Unza Waqar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPTX, PDF, TXT or read online on Scribd
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Waterlogging and salinity,

Global warming, Acid rain,


ozone depletion
By Ma’am
Sadia Sami
Water logging and salinity
Water logging
Salinity(Thur)
Salinity
Water logging and salinity in
Pakistan
O Water logging and salinity is most one of the
most severe impediments to Pakistan’s
agriculture. Water logging and salinity affects
25% of irrigated land in Pakistan, reducing
crop yields. It has been reported that 48% of
soils in Sindh and Punjab are saline while 18%
of those are strongly saline.
Causes of waterlogging and
salinity in Pakistan
O High water table
O Hot and dry climate
O Heavy rainfall
O Poor irrigation practices
Effects of Waterlogging
Remedial measures
O Pumping out groundwater through tube wells helps to lower the
water table of water logged areas.
O Adopting technique of bio-drainage in which water table is
lowered by raising tree planation. It removes excessive water
through transpiration.
O Afforestation on saline/waterlogged soil through resistant varieties
of plants.
O Lining of canal to control seepage.
O Quick removal of rain water that will prevent rising of water table.
O SCARP(Salinity Control and Reclamation Project) in Pakistan has
recovered 7.8 million hectares of land.
O Plantation of salt tolerant tress, grasses and crops.
Acid rain
Acid Rain and pH levels
Effects
Process of adding lime to acidic lake.
Ozone depletion
Global warming

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