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QUESTION 16 (6 marks) a) Use Stimulus | in the stimulus book to identify which location flood mitigation efforts should be focused on. Justify your decision using three pieces of evidence from the stimulus. [4 marks] b) Identify a long-term flood mitigation strategy that could be implemented to decrease the flood risk at this location. Explain how this mitigation strategy would reduce the risk of flooding. [2 marks]
QUESTION 22 (7 marks) Explain how clearing a mangrove ecosystem would affect the net contribution of greenhouse gases for the area being cleared. In your response identify gas exchanges in plants and soil substrates.
QUESTION 5 Land clearing can reduce the frequency magnitude and intensity of (A) floods. (B) droughts. (C) bushfires. (D) landslides.
QUESTION 6 Urbanisation can increase the magnitude of floods by reducing (A) above-ground water storage capacity. (B) impermeable surface area. (C) evapotranspiration. (D) run-off.
QUESTION 3 (16 marks) Refer to Stimulus 3 in the stimulus book. a) b) Cc) d) Determine whether the northern or southern basin is most likely to be experiencing drought. Support your response using evidence from the map. Explain how dams are distributed in the Murray—Darling Basin. Support your response with evidence from the map. Identify a physical and biological strategy to reduce the impact of a future drought in the Murray—Darling Basin. Explain your reasoning. Predict one impact of drought on a terrestrial ecosystem and one impact on an aquatic ecosystem in the Murray—Darling Basin. Explain your reasoning. [2 marks] [4 marks] [6 marks] [4 marks]
QUESTION 21 (10 marks) This question refers to Stimulus | in the stimulus book. a) Explain the three most likely causes of localised flooding in Oxapampa. b) Predict one positive and one negative impact that flood events will have on the local aquatic ecosystem situated along the Rio Chorobamba river. c) What are two ways that the impacts of the flood events could be mitigated for the buildings downstream of Oxapampa? d) Where is agricultural activity most likely to occur in and around Oxapampa? Provide two reasons to justify your response. [3 marks] [2 marks] [2 marks] [3 marks]
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