What is water logging and salinity definition?
The excessive use of water for crops, non-cemented canals and a poor drainage system are causing waterlogging and salinity in the area. This ultimately results in waterlogging. “The stagnant water gradually turns saline and destroys nearby arable lands.”
What is water logging problems?
Waterlogging is simply the saturation of soil with water, either temporarily or permanently. When there is too much water in an area, the soil is unable to absorb the water as it should ordinarily. It can also happen when the water table rises to the extent that the soil pores in the crop root zone.
What is salinity problem?
Salinity is the accumulation of salt in land and water to a level that damages the natural and built environment. Salinity usually occurs with other natural resource problems such as decreasing soil and water quality, erosion and loss of native vegetation.
What is called water logging?
What is waterlogging? Waterlogging is excess water in the root zone accompanied by anaerobic conditions. The excess water inhibits gaseous exchange with the atmosphere, and biological activity uses up available oxygen in the soil air and water – also called anaerobiosis, anoxia or oxygen deficiency.
What is salinity Slideshare?
Concentration of dissolved salt in a given volume of water expressed in grams of salt per kilogram of water, or in parts per thousand Both soil and natural waters can become saline. Retreating seas Rain Rocks.
What is water logging 8?
When too much water is given to the soil, it becomes wet. Water accumulates around the plant. This is called water-logging.
How is waterlogging and salinity prevented?
The first requisite in the prevention or elimination of waterlogging and salinity problems is an adequate drainage system. Very often the natural drainage in an area, along with good water management, is sufficient to eliminate excess water and preclude the need for expensive subsurface drainage systems.
What is called salinity?
The term “salinity” refers to the concentrations of salts in water or soils. Salinity can take three forms, classified by their causes: primary salinity (also called natural salinity); secondary salinity (also called dryland salinity), and tertiary salinity (also called irrigation salinity).
What is water logging in agriculture?
Waterlogging is the natural flooding and over-irrigation that brings water at underground levels to the surface. As a consequence, displacement of the air occurs in the soil with corresponding changes in soil processes and an accumulation of toxic substances that impede plant growth.
What is water logging in geography?
Waterlogging is the saturation of soil with water. Soil may be regarded as waterlogged when it is nearly saturated with water much of the time such that its air phase is restricted and anaerobic conditions prevail.
What is salinity difference?
Salinity classification (Practical Salinity Scale S) of water bodies. The salinity of seawater is defined as the total amount by weight of dissolved salts in one kilogram of seawater. Salinity is expressed in the unit g / kg, which is often written as ppt (part per thousand) or ‰ (permil).
What are harmful effects of water logging and salinity?
Waterlogged soil provides excellent breeding grounds for misquitoes,and cause malaria.
What does water logging and salinity mean?
The water on reaching the surface evaporates and the salts are deposited on the surface, rendering the land unsuitable for farming. The rise of the water-table to the surface level is called water logging and the appearance of salty patches is called salinity. Management of Water Resources: Ther is a scarce resource in Pakistan.
What is meant by salinity and water looging?
Salts in the soil also rise to the surface with the water-table. The water on reaching the surface evaporates and the salts are deposited on the surface, rendering the land unsuitable for farming. The rise of the water-table to the surface level is called water logging and the appearance of salty patches is called salinity.
How does salinity affect water quality?
Water quality. The most significant off-site impact of dryland salinity is the salinisation of previously fresh rivers. This affects the quality of water for drinking and irrigation—with serious economic, social and environmental consequences for both rural and urban communities.