Desertification of rural areas in Brazil!
Postado por Peloggia, em 13/11/2015
The major concern of scientists and researchers is the imminent appearance of areas in Brazil with characteristics of drylands, or deserts. Contrary to what seems, the water present in these areas migrate to other places, so that the surface does not have access to this liquid.
Karl Marx quoted that "it is a paradox Earth moving around the sun and the chemical composition of water consists of two highly inflammable gases. Scientific truth is always paradox, if judged by everyday experience that clings to the ephemeral appearance of things".
It is wrong to say that the water is running out, because the water in the world will never end, given that the water cycle, or water cycle is a closed cycle, that is, do not lose water, and much less win water for the planet. Therefore, we can say that the volume of water existing on Earth today is the same volume existing for millions of years, and that will be the same here for millions of years, and always. The big issue is water quality. We can say that drinking water quality, is an increasingly lower volume due to the negative actions of man in river basins.
The occurrence of desertification in Brazil is concentrated in the Northeast, Midwest, Southeast and South of the country, which receives arenization denomination. Desertification is the moisture reduction phenomenon in sandy soils and the impoverishment of fertility, located in climates sub-humid, arid and semiarid region. It can be caused by both natural actions such as periodic climate changes, and by human action. It reaches a total area of 2.3 million square kilometers, about 30% of the mapped territory, involving already desertified localities and areas with high risk and susceptibility.
Among the harmful actions, we can mention the burning and deforestation, as well as the practice of monoculture (without crop rotation in soils), among others. In northeastern Brazil, it is estimated that about 230,000 square kilometers are already desertified, an area larger than the state of Ceará, which are already heavily degraded and infertile, making it impossible to planting. The state of Piaui, already has 71% of its agrarian space taken by the infertility of their soils. Populations that inhabit the South and part of southeastern Brazil, practically had to move to other regions in search of better soils and favorable living conditions.
Wealthier producers have moved, mostly, to the region of the Brazilian Midwest, where already the case a principle of desertification / arenization. The effects of desertification are very serious and varied, and affect the environment, the economy and society in general.
Environmental damage caused by desertification are erosions, which become increasingly larger and more frequent, infers the poverty of the soil, making them infertile, the decrease or disappearance of vegetation and animals, and the occurrence of water disasters, destruction of riparian forests, among others. Social impairments presented by the occurrence of desertification happen when this phenomenon reaches local housing people or areas that would be used to plant and grow food.
Economic losses are due to the devaluation of desertified land, agricultural poorness of the soil and the loss of space for economic practices that will need to be developed elsewhere, causing more deforestation and more environmental damage.
Erosion, for example, is one of the most disturbing soil amendments. This process consists of the displacement of soil by the action of rain, rivers or the wind, in which the soil particles are dragged to the lower areas of the land, being accelerated by man through the burning, deforestation, poor farming techniques , mining, expansion of urban areas and soil sealing.
Teacher doctor Adilson PELOGGIA
Specialist in Environmental Sciences