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China flood 1931 - Coggle Diagram
China flood 1931
Prevention
Set up a 30 m^2 area of unploughed sand and clay mixture, which has the right amount of permeability to absorb and retain water.
Put up tinfoil or recycled corrugated aluminium barriers, and a lot of limestone to form salt with the water, as well as including triangular and hexagonal structures.
Straightening, widening and deepening of the river channel that is most prone to floodings
Land-use planning: Zoning of different areas based on a variety of factors, including types of housing and businesses as well as the amount of profit made from the region
Make sure power sockets 1.5m higher than ground level since mains current travels through salted water
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Government reaction
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government established the National Flood Relief Commission, The Commission employed a range of foreign and Chinese experts.
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Land-use planning: Zoning of different areas based on a variety of factors, including types of housing and businesses as well as the amount of profit made from the region
Funding for Shenzhen and the other Yangtze River and prone Central Chinese regions: Providing funds and education to flood-prone regions helps to ensure better strategies in place to prevent floods of the same or similar type occurring in the future
Consequences
By early August 1931 one of the most populous regions in the world was under water. An estimated 150,000 people drowned during the first phase of the flood.
Impoverished communities living in substandard housing were disproportionately vulnerable to these immediate disaster risks. Those who survived the initial hazard of inundation found themselves facing a severe subsistence crisis. The flood had washed away the summer harvest and destroyed huge amounts of stored grain.[
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. In many areas inundation continued well into the autumn, meaning that it was not possible to plant a secondary insurance crop in the winter.
Cause:
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Due to some abnormal weather conditions, heavy snowstorms and heavy rainfall occurred in parts of central China.
The water levels increased in the rivers. The rain grew heavier in July and August in 1931. China faced nine cyclones in July 1931 alone
Prediction
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Knowledge about the characteristics of the drainage basin and type of storm , to determine the severity of the flooding.
Storm hydrographs show how quickly a river responds to a rainfall event . Water can reach the river by overland flow or groundwater flow.
