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	Miners never miss an occasion to mention the landslides in the mountainous areas that may fill the river bed in an instant. However, the occasional landslides must not be compared to the steady dumping of mine waste. The river bed and flood plain are never given a chance to recover to normal conditions as a result of the mine workings (below) on the valley sides upstream.
	(a) Use the river  images to outline how human activity may lead to the flooding of rivers such as the Ok Tedi.	(5)
	(b) Explain how physical factors can influence the severity of flooding.	(10)
	(c) Compare the social and economic impacts of flooding in different drainage basins.	(10)
	After next lesson you should be able to .....
	(d) Outline the advantages and disadvantages of a flood management scheme	(10)