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According to the National Disaster Management Division, which of the following is a factor that can lead to floods?

AProlonged drought conditions.

BReduced reservoir levels.

CRivers overflowing their banks due to heavy rains.

DA decrease in ocean tides.

Answer:

C. Rivers overflowing their banks due to heavy rains.

Read Explanation:

According to the National Disaster Management Division of the Ministry of Home Affairs, a factor that can lead to floods is rivers flooding their banks because of heavy rains.

  • Definition of Floods: Their definition explicitly states that "Floods are a temporary inundation of large regions as the result of... rivers flooding their banks because of heavy rains."

  • Mechanism: When rainfall is intense or prolonged, rivers receive more water than their channels can contain. This excess water then overflows the natural banks, spreading onto adjacent dry land.


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Consider the general characteristics and consequences of droughts.

  1. A drought is always a short-term event with minimal long-term effects on ecosystems.
  2. Arid and semi-arid zones are particularly susceptible to severe droughts.
  3. The primary impact of drought is always an increase in available fresh water resources.
  4. Droughts can precipitate a cascade of other disasters, including food insecurity and widespread famine.