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Human activity impacts on surface processes - Leaving Cert Geography - Question 2C - 2021
Question 2C
Human activity impacts on surface processes. Examine this statement with reference to one of the following: - The impact of flood control measures on river process... show full transcript
Worked Solution & Example Answer:Human activity impacts on surface processes - Leaving Cert Geography - Question 2C - 2021
Step 1
The impact of flood control measures on river processes
Answer
Flood control measures, such as the construction of dams and levees, significantly alter river processes. These structures aim to mitigate flooding but also impact sediment transport and river morphology.
Impact on Sediment Transport: Dams trap sediments that would naturally flow downstream. This can cause sediment depletion downstream, affecting habitats and leading to riverbed erosion.
River Morphology Changes: Levees can confine rivers to narrower channels, altering flow dynamics. This can increase flow velocity, potentially leading to cutbanks and channel widening in certain areas.
Conclusion: The examination of flood control measures highlights both the benefits of protecting human lives and infrastructure against flooding, and the ecological consequences on river processes.