To understand how deserts spread, the causes and the implications on vulnerable populations. Have you written lots of study guides or notes? Over the Horizon Migration to the EU. Living World – Desertification Strategies. Desertification is the process by which land becomes drier and degraded, as a result of climate change or human activities, or both. Lack of food and water can also mean farmed species such as cattle can die of starvation. All of these things reduce the amount of natural vegetation.
The loss of vegetation can cause severe soil erosion. In addition, loss of species affects the availability of local medicines. In addition, Climate change is making temperatures hotter and rainfall less reliable and more variable. The knock on effects have been good for the whole community. A contour stone line 25 to 30cm high with other stones behind is constructed. There are no plants or leaves to intercept rain and soil is left exposed to hot sun so the sun bakes the soil and it cracks.
How has this animal adapted to its climate and surroundings?
It can have a damaging impact on both people and the natural environment. Cade knock on effects have been good for the whole community. Droughts occur when a long period of abnormally dry weather leads to a severe water shortage. Earn hundreds of dollars each month by selling your written material to your fellow students. Desertification leads to outmigration in countries such as Burkina Faso in the Sahel. Stuey are also often caused by the activity of humans as well.
Human activities that can help trigger droughts include: Click on the blue tab below to access the worksheet. The villagers work together and it is a collective effort. Make notes on different approaches that can be taken to reverse the effects of desertification in the Sahel region of Africa. When it rains, the rainwater runs over the surface of the soil rather than soaking in which means that soil can often be washed away.
Large stones are then placed into this trench followed by smaller ones. With less vegetation there is less transpiration and evaporation from the soil, causing less rainfall. Clean water is not available for people to drink, increasing the use of contaminated water and diseases such as cholera.
Case Study 9: Causes/management of Sahel desertification
Population pressure has also stopped people moving animals from place to place as they traditionally did and using settled agriculture. We have even managed to reverse the effects of desertification. Cass Sahel is semi- aridreceiving between and mm of rainfall in total in an average year, however it only falls in one or two months.
The nutrients in the soil get washed or leached away leaving soil infertile. As population increases they increase the numbers of animals they keep, such as goats, which eat more vegetation. Task 1 – You’ll need the New Wider World textbook, pages Planting the trees reverses desertification by preventing soil erosion and providing nutrients for other plants and crops to grow.
The semi-arid landscape of the Sahel. These stones slow down run off water and allow it time to infiltrate the ground and rich sediments to be trapped in the field. Check out the photo beneath too! Commercial farms growing cash crops such as cotton lose income, which may cause unemployment.
Sahel Drought Case Study
Environmental impacts Seasonal rivers and water holes dry up, so organisms which live in them or rely on them for water may die. Overgrazing of animals iii. Barren land has been restored and vegetation re-established so the scheme has been a big success and sustained. Add to cart studu Free.
Complete the activities set out using the David Attenborough video to help you. What is the mean temperature of the hottest month? The Sahel is located directly south of the Sahara desert and stretches from the east to the west of Africa.
Sahel Drought Case Study – Natural Hazards – Stuvia
Study the embedded presentation underneath too. Strategies used to reduce the risk of desertification Desertification is not inevitable stud with careful management of water resources, the soil and vegetation via tree planting we can limit the spread of deserts. A contour stone line 25 to 30cm high with other stones behind is constructed.