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  • Essay / Causes of Irrigation Waterlogging - 821

    Humanity over the years has strived to increase the production of arable land to maintain the capacity to feed an ever-increasing population. Irrigation is generally considered the most effective way to increase agricultural production. It can help supplement the water needed for crop growth when rainfall is low, or in wetter areas it can help bridge periods of drought and reduce agricultural risks. The aim of irrigation is to increase the area of ​​land usable for crops, agricultural production per harvest and per season and the diversity of crops that can be grown in different areas (RJ Oosterbaan, page 1). With the advent of irrigation, the problem of waterlogging arises. In flat lands, waterlogging is the result of local losses of irrigation water, due to leaks from canals and especially to percolation in irrigated fields due to the lack of sufficient natural drainage capacity of the aquifer. These waters add to the groundwater reservoir, thereby raising the water table. In lands with considerable topographic differences, waterlogging occurs mainly in depressions, valley bottoms or at the foot of slopes. It is caused by groundwater flow from irrigation losses in higher areas. Salinity develops in arid and semi-arid regions, simultaneously with waterlogging. As long as the water table remains deep, the salts, imported with the irrigation water, are carried into the deeper soils with the losses by percolation of the irrigation water. However, if the water table becomes shallower, excessive irrigation can no longer take place, otherwise the land would be flooded with stagnant water. At this stage, salt leaching no longer occurs and the salts brought with the irrigation water accumulate in the middle of the paper...... animal consumption, animals consuming salt water may have many health problems. As an example, dry cows need approximately 8 to 10 gallons of water per day. Cows in their last 3 months of gestation can drink up to 15 gallons per day. Those who drink milk need about five times more water than the volume of milk produced. And calves need much more water after weaning than before. Despite the many disappointing results, irrigation can and should be a central part of producing food for the world's growing population and maintaining farmers' livelihoods. In the past, many positive examples have been created. It is therefore essential that engineers and economists restore the image of irrigation by embarking on more efficient irrigation projects in which they pay due attention to environmental impacts that may permanently change the environment over time. 'future..