The adverse effects of desertification also include floods in heavy rainfall regions, land, water, and air pollution, storms and several other natural disasters, all of which can be fatal to human life.
Some of the techniques that may help ameliorate the consequences of desertification in irrigated croplands, rain-fed croplands, grazing lands, and dry woodlands include: Generally such periods see the disintegration of cultural values, complex economic systems, technological systems, complicated urban infrastructure, ethnic identities, and often of writing systems and languages as well.
Low rainfall and locusts caused a food crisis during the summer of Rainfall is scarce in drylands, but when it does come it can be torrential. Definitions[ edit ] Considerable controversy exists over the proper definition of the term "desertification" for which Helmut Geist has identified more than formal definitions.
One proposed barrier is that the costs of adopting sustainable agricultural practices sometimes exceed the benefits for individual farmers, even while they are socially and environmentally beneficial. Which, itself, predictably leads to social problems.
The real push off the cliff, with Desertification in africa causes and effects to desertification, though, came after the Roman Empire collapsed.
Much of the food that Romans ate during this time was actually imported from this region owing to its great agricultural productivity as compared to the depleted Roman soils of the time. Deforestation As mentioned earlier, plants anchor the top soil and prevent it from erosion. This plan was proposed in the late s, and has become a major ecological engineering project that is not predicted to end until the year Salt traps, which involve the creation of so-called void layers of gravel and sand at certain depths in the soil.
Climate Change As a result of vegetation removal, the climate changes and affects the overall environment. Or nudge it off a cliff, for that matter. Both the human population and livestock population had tripled and the cultivated area had doubled from tosuggesting that socio-economic factors might have contributed more significantly to the desertification.
HelpSaveNature offers an insight into the causes and effects of desertification on the environment, and ultimately on human life. During most of these times, deserts have grown and shrunk independent of human activities. The concept does not refer to the physical expansion of existing deserts but rather to the various processes that threaten all dryland ecosystemsincluding deserts as well as grasslands and scrublands.
But at that epoch the country was unimpaired, and for its mountains it had high arable hills, and in place of the swamps as they are now called, it contained plains full of rich soil; and it had much forest-land in its mountains, of which there are visible signs even to this day; for there are some mountains which now have nothing but food for bees, but they had trees no very long time ago, and the rafters from those felled there to roof the largest buildings are still sound.
Eventually the land collapses completely and turns to what is more or less desert — able only to support population sizes considerably lower than those that were there before. The method was invented by Peter Westerveld. They can also reduce the local effects of drought.
Predictably, this leads to mass migration from the region to more biologically productive areas, or to cities. Rain -fed croplands, which experience unreliable rainfall and wind-driven soil erosion.
Some soils for example, claydue to lack of water can become consolidated rather than porous as in the case of sandy soils. When used to irrigate crops, runoff evaporates and leaves behind much of the salts that it collected. Rainwater results from the condensation of water evaporated by sunlight.
Grazing livestock, usually not left to wander, would eat the grass and would minimize any grass growth while grass left alone would eventually grow to cover its own growing buds, preventing them from photosynthesizing and killing the plant.
By their very nature, arid and semiarid ecosystems are characterized by sparse or variable rainfall. Very often, such deforested areas are not replanted.
This technique involves changes in the design of irrigation systems to prevent water from pooling or evaporating easily from the soil.
And the soils of North Africa began their slow decline pretty soon after large-scale exploitation began. Causes of Desertification Overgrazing Grass is essential for anchoring the surface soil in dryland regions. Many scientists think that one of the most common causes is Overgrazing:Causes of desertification.
Overgrazing. In arid regions, grass and other vegetation is necessary to keep the soil in place. If the vegetation is overgrazed by livestock, there is nothing that remains to prevent soil from blowing or washing away, and if this process occurs long enough, it can lead to desertification.
Deforestation. Desertification causes a high-risk of crop failure, low economic returns on crops, a build-up of salt in the soil and the accidental burning of semiarid vegetation. This process turns usable desert land into unusable land due to poor land management.
Desertification limits the land's ability to. Desertification: Desertification, the process by which natural or human causes reduce the biological productivity of drylands (arid and semiarid lands).
Declines in productivity may be the result of climate change, deforestation, overgrazing, poverty, political instability, unsustainable irrigation practices, or. Amongst several causes of environmental degradation, desertification is on the rise, and has led to a number of adverse effects on the environment.
HelpSaveNature offers an insight into the causes and effects of desertification on the. only is desertification harmful to the earth and its inhabitants, but it is also expensive – each year, the world loses US$42 billion to desertification and its effects.
The causes of desertification are both natural and man-made. Causes and effects of desertification: Desertification is defined as a process of land degradation in arid, semi-arid and sub-humid areas due to various factors including climatic variations and human activities.Download