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‘Climate change is on course to radically alter the role of water in deserts and their margins, affecting both human populations and the physical landscape.’ To what extent do you agree with this view? - AQA - A-Level Geography - Question 2 - 2018 - Paper 1
Question 2
‘Climate change is on course to radically alter the role of water in deserts and their margins, affecting both human populations and the physical landscape.’ To what... show full transcript
Worked Solution & Example Answer:‘Climate change is on course to radically alter the role of water in deserts and their margins, affecting both human populations and the physical landscape.’ To what extent do you agree with this view? - AQA - A-Level Geography - Question 2 - 2018 - Paper 1
Step 1
Discuss the impact of climate change on water in desert regions
Answer
Climate change is predicted to have significant effects on water mechanisms in desert regions, leading to altered hydrological cycles. Higher temperatures, up to 5°C, are expected to reduce the availability of surface water by accelerating evaporation rates and diminishing water storage in ephemeral streams. This may exacerbate the challenges faced by human populations and ecosystems dependent on these scarce water resources.
Step 2
Analyze the effects on human populations
Answer
The reduction in water availability directly impacts human communities living in desert margins. These populations may face higher risks of food insecurity as agriculture becomes less viable due to water scarcity. Migration patterns may shift as communities search for more sustainable living conditions. Additionally, the health implications related to water scarcity, such as increased risk of drought-related diseases, could gravely affect vulnerable populations.
Step 3
Evaluate changes in the physical landscape
Answer
In terms of physical geography, the lack of water can lead to significant alterations in desert landscapes. Vegetation patterns may change, with some species unable to adapt to the newly arid conditions. The potential for increased wind erosion may transform sediment dynamics, leading to the advancement of sand dunes and greater desertification. Furthermore, the expansion of saline areas due to poor water management can reshape the land in irreversible ways.
Step 4
Consider resilience and adaptation strategies
Answer
It is crucial to consider how resilience and adaptive strategies can mitigate some adverse effects of climate change in desert environments. Incorporating sustainable water management practices may help communities cope with reduced water availability. Additionally, restoration of natural ecosystems and investment in technology to improve water efficiency can enhance resilience to climate impacts.
Step 5
Conclusion on extent of agreement
Answer
In conclusion, I largely agree with the view that climate change is set to radically alter the role of water in deserts, with consequential effects on both human populations and the physical landscape. While there will be significant challenges and changes, proactive measures can facilitate adaptation and resilience.