Question

Hazards planning in megacities of Asia to separate people from drinking contaminated groundwater and flooding can be best accomplished by which of these?

1.	Induce rural residents to stay in their villages and not come to the cities by giving them grain and seed.
	2.	Test wells for lead and arsenic, and encourage them to drink surface water instead if the tests come back positive
	3.	Master plan low lying areas as floodplains, and discourage growth there by not bringing in infrastructure such as roads, sewer and water
	4.	Clear out slums (informal housing) areas where surface water is contaminated with bacterial disease, and relocate people to outlying areas 25 miles from the city center where land is available
	5.	None of the above appear to have a successful track record of helping solve these problems

Answer 1

Ans. None of the above appears to have a successful track record of helping solve these problems

In megacities of Asia, land subsidence and increased rainfall is largely the cause of floods. Therefore, to safeguard people from drinking contaminated groundwater and flooding, measures such as improvement in flood forecasting and information, rainwater harvesting, provision of the sustainable drainage system, raise dykes, solid waste management, 'urban greening' and invest in pump station capacity are needed.