Desertification is, “land degradation in arid, semi-arid, and dry sub-humid areas resulting from various factors, including climatic variations and human activities”. … Desertification processes affect about 46% of Africa.
What are the impact of desertification in South Africa?
South Africa is losing about 300 to 400 million tons of topsoil every year. Areas such as the Northern Cape are especially prone to desertification. To halt desertification the number of animals on the land must be reduced, allowing plants to regrow.
How does desertification impact Africa?
The degradation of drylands in Africa is forcing people who can no longer make a living off the land to move to urban areas. According to the UN Population Division, the population of Lagos, Nigeria, will grow from 13.4 million in 2000 to 23.2 million in 2015, partly due to an influx of displaced rural communities.
What is desertification in South Africa?
South Africa ratified it on 28 September 1997. Desertification is the degradation of land in arid, semi-arid, and dry sub-humid areas. It is caused primarily by human activities and climatic variations. … Combating desertification is essential to ensuring the long-term productivity of inhabited drylands.
What is the importance of droughts and desertification in South Africa?
The significance of these problems in the region is demonstrated by outlining the impact that drought and desertification have on economic growth and poverty reduction, agriculture and food security, water, biodiversity, energy and migration.
What are 3 causes of desertification?
Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology.
What are three effects of desertification?
Higher food prices, water availability, violent conflicts for land, migration, increasing poverty, pollution from wind-blown dust particles coming from distant lands, could be the outcomes of desertification if we let it consume more of our planet.
What are three effects of desertification in Africa?
Desertification affects topsoil, groundwater reserves, surface runoff, human, animal, and plant populations. Water scarcity in drylands limits the production of wood, crops, forage, and other services that ecosystems provide to our community.
What is the impact of desertification?
Desertification has caused major environmental and socioeconomic problems in many arid and semiarid areas of the world1. It causes soil degradation and severely reduces potential land productivity2–4, which causes degradation of the ecosystem and its associated ecosystem services.
Why is desertification a huge problem in Africa?
It has been estimated that 319 million hectares of Africa are vulnerable to desertification hazards due to sand movement. … Deforestation exposes the soil to high temperatures which break down the organic matter, increase evaporation and make the soils vulnerable to erosion.
How can desertification affect humans?
Land degradation and desertification can affect human health through complex pathways. As land is degraded and deserts expand in some places, food production is reduced, water sources dry up and populations are pressured to move to more hospitable areas. … the spread of infectious diseases as populations migrate.
Where does desertification occur in South Africa?
Driving eastward out of the Cape, through the winelands around Paarl and away from the region of winter rainfall the landscape becomes arid. Sheep grazing replaces the vineyards except in irrigated areas where fruits can still be grown.
What area in Africa is most affected by desertification?
The U.N. estimates about 30 million acres of land across the globe are impacted by desertification every year. The most vulnerable region is a 3,000-mile stretch of land that includes ten countries in the Sahel region of Africa. The Sahel is the area between the Saharan Desert and the Sudanian Savannah.
What are the impacts of drought in South Africa?
|Primary impacts||Secondary impacts|
|Increased damage to natural habitats||Loss of biodiversity|
|Reduced forest, crop, and range land productivity||Reduced income and food shortages|
|Reduced water levels||Lower accessibility to water|
|Reduced cloud cover||Plant scorching|
How does desertification affect the South African economy?
Droughts have become more commonplace in South Africa in recent years. … In the province more than R5 billion was lost to the economy, largely due to the drought. This matters for the country as a whole because the Western Cape contributes 22% to national agricultural GDP.
What are the main causes of drought in South Africa?
One of the main causes of drought in South Africa is the variability in rainfall (Mason and Tyson, 2000; Tyson and Preston-Whyte, 2000 and Vogel et al., 2000). The El Niño phenomenon accounts for approximately thirty percent of rainfall variability (Tyson and Preston-Whyte, 2000).