What is water logging and salinity in Pakistan?
The excessive use of water for crops, non-cemented canals and a poor drainage system are causing waterlogging and salinity in the area. According to Bukhsh, farmers benefit from the crops initially but after some time, the excessive use of water turns fertile land barren and reduces yield.
How many acres of land in Pakistan is suffering from salinity and water logging?
In Pakistan, more than 6.3 million hectares have been damaged by salinity and 1 million hectares are damaged by waterlogging.
How do you overcome waterlogging and salinity?
- 1 Surface and subsurface drains. The first requisite in the prevention or elimination of waterlogging and salinity problems is an adequate drainage system.
- 2 Reclamation of salt affected soils.
- 3 Correcting sodium problems with amendments.
- 4 Management of saline and sodic soils.
How does water logging causes salinity?
In irrigated agricultural land, waterlogging is often accompanied by soil salinity as waterlogged soils prevent leaching of the salts imported by the irrigation water. This is generally due to the higher rainfall, higher dilution capacity in surface waters and lower initial salt content in the soil.
What is water logging in Pakistan?
Seepage of water from canal system The main cause of waterlogging in pakistan is seepage of water from network of canal system. 40-50% water is lost from main canals ,seeps through soil and rised the ground water. CAUSES OF WATERLOGGING 4.
What is the reason of water logging in Pakistan?
Excessive Irrigation and Poor Drainage System by Farmers Irrigation could result in waterlogging if there is overirrigation, inadequate drainage, poor irrigation management, obstruction of natural drainages, seepages from canals as the case in Pakistan, and if the parches are landlocked without outlets.
Which area of Pakistan is suffering due to water salinity?
Soil salinity is a serious problem of agriculture in Pakistan. Salt-affected soils alone occur on more than six million hectares and more than 70% of the tube-wells in saline areas are pumping out brackish water. The problem is more severe in Sindh and Southern Punjab than other parts of the country.
What are the causes of salinity in Pakistan?
Improper irrigation practices and lack of drainage have generally led to accumulation of salts in the soil in concentrations, which are harmful to the crops. There is a major imbalance in the amount of salt entering and leaving the soil in Pakistan.
How do you control water logging?
Various Ways of Preventing Waterlogging
- Control the Loss of Water. The seepage loss from the canals can be reduced by a number of measures.
- Augmenting Outflow and Preventing Inflows.
- Disposing of the Rainwater.
- Preventing the Loss of Water.
- Not Using Alkaline Water.
- Raise the Beds.
- Install Proper Drainage Systems.
What are the main reason of water logging in Pakistan?
Seepage of water from canal system The main cause of waterlogging in pakistan is seepage of water from network of canal system. 40-50% water is lost from main canals ,seeps through soil and rised the ground water. In some cases the water table has risen upto root zones or even surface of soil.
What refers to the salt content of water?
The term “salinity” refers to the concentrations of salts in water or soils.
What causes water logging?
Waterlogging is caused by a combination of excess rainfall (for the site), poor external drain- age (runoff), poor internal drainage (water movement in the soil profile) and the inability of the soil to store much water.