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How far can an understanding of systems in physical geography help to mitigate against the expansion of deserts into semi-arid areas? - AQA - A-Level Geography - Question 2 - 2022 - Paper 1
Question 2
How far can an understanding of systems in physical geography help to mitigate against the expansion of deserts into semi-arid areas?
Worked Solution & Example Answer:How far can an understanding of systems in physical geography help to mitigate against the expansion of deserts into semi-arid areas? - AQA - A-Level Geography - Question 2 - 2022 - Paper 1
Step 1
Knowledge and Understanding of Systems in Physical Geography
Answer
An understanding of systems in physical geography is essential in addressing desertification. It involves knowledge of inputs such as solar radiation, precipitation, temperature, and the role of vegetation. For example, vegetation contributes to soil moisture retention and stabilizes the environment against erosion.
Step 2
Application of Knowledge to Factors Leading to Desertification
Answer
Systems thinking helps illustrate the dynamics of desertification processes. For instance, understanding feedback loops involving vegetation loss can demonstrate how increased temperatures and reduced rainfall exacerbate desert conditions, leading to a cycle that is hard to break. Evaluating human impacts, such as land use and resource extraction, provides insights into areas at risk and strategies for management.
Step 3
Mitigation Strategies Based on Physical Geography
Answer
Utilizing systems understanding, various strategies can be implemented, such as the construction of man-made tunnels (Foggaras) to enhance water supply and vegetation growth in semi-arid environments. This demonstrates how community-driven approaches can reverse desertification trends by enhancing the natural water cycle.
Step 4
Evaluation of Human Responses and Sustainability
Answer
It is crucial to apply knowledge of systems to assess sustainable practices in combating desertification. For example, community awareness and engagement in utilizing native vegetation can significantly impact resilience against desert spread. Evaluating case studies, like those in Algeria, highlights successful interventions that intertwine local knowledge with scientific understanding.