Answer of the question that when and where the world's ever biggest flood occurred and how much losses were caused by that hazard would be helpful for temporal assessment of floods in terms of intensity and losses. Therefore, convincing logical answer is needed.
Well,
It is estimated that the oldest flood occurred on the surface of the earth at about 3.8 billion years, and the effects of this flood were derived from the rocks of the conglomerates on the island of Greenland. The largest flood identified so far is the flood that occurred 12,000 to 17,000 years ago in the Northwest United States, where the water from Missoula Lake was installed at 17 million m3 / s. During this period, the Arabian Peninsula was wet. Known as the era of the Fourth Ice Age, which ended 15,000 years ago. One of the most famous floods known to humans and the events of the flood of our master Noah, 3,000 years ago, which is the boundary between prehistoric and post-date times. The flood covered an area of 40,000 square miles (6,400 km2) , obtained cities and villages in the Mesopotamia region, leaving the sediments of the rivers estimated to be about 11 feet (330 cm) near Ur and Eridu.
Sincerely
History The Worst Floods in History
1931 Yangtze River Flood. Date: August 18, 1931. Location: China. Death Toll: Estimated 3.7 million. ...
1887 Yellow River Flood. Date: September 28, 1887. Location: China. ...
1938 Yellow River Flood. Date: June 1938. Location: China. ...
1975 Banqiao Dam Failure. Date: August 8, 1975. Location: China.
This question partly depends on how your define the term “biggest flood” and also the source of the flood.
In terms of flood flows the World’s Catalogue of Maximum Observed Floods published in 2003 is a useful document. The data in the catalogue provides the largest observed floods for over 70 countries are listed by country. For most countries there are three tables of data. The location of the flood flow observation sites are defined and background information about the drainage basins for which flood data are available (e.g. climate regime, mean annual precipitation and mean annual discharge, if known) are also provided. For most flood events it is the maximum instantaneous discharge observed during the event that is reported. If available, ancillary information about the event (e.g. the antecedent rainfall, flood duration), are also provided. In addition, for some observation sites in some countries, series of annual maximum instantaneous discharge data are available in This catalogue can be download here: http://hydrologie.org/redbooks/a284/RB284.pdf .
In terms of loss of life and damage caused by fluvial floods there are several floods in China as Eman points out that have caused significant damage.
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