Our analysis shows a clear trend across the world.
GDP Exposure in 2030: Disparity between the Developed and Developing Countries However, their national incomes are so large that they drop off a list of countries ranked by percentage of GDP exposed. China and Brazil, for example, would fall first and fifth respectively on a list ranked by gross GDP affected. We judged the potential national economic consequences of river floods to be highest in countries with the largest percentage of affected GDP. Bangladesh is a distant second, at $5.4 million. India has by far the most GDP exposed, at $14.3 billion. WRI analyzed which countries have the highest percentage of total GDP affected by river flooding on average per year, and each of the top 20 is classified as least developed or developing. Roughly 167,000 people in the United States, the highest-ranked high-income country, are affected every year. These countries are all considered least developed or developing.
We found that the top 15 countries account for nearly 80 percent of the total population affected every year. We ranked 164 countries by the number of people affected by river flooding. The Analyzer estimates current and future potential exposed GDP, affected population and urban damage from river floods for every state, country and major river basin in the world. WRI co-developed the tool with four Dutch research organizations: Deltares, the Institute for Environmental Studies of the VU University Amsterdam, Utrecht University and PBL Netherlands Environmental Assessment Agency, supported by the Netherlands’ Ministry of Infrastructure and the Environment. The Aqueduct Global Flood Analyzer, a new online tool, quantifies and visualizes the reality of global flood risk. Quantifying and Visualizing River Floods Worldwide That number could increase to 54 million in 2030 due to climate change and socio-economic development. New analysis shows that approximately 21 million people worldwide are affected by river floods each year on average. More people are affected by floods than by any other type of natural disaster. Those floods may have been the most dramatic of recent river floods, but the threat extends well beyond Southeast Asia. Nongtdu and her family survived, but unusually heavy monsoon rains in September 2014 triggered floods in India and Pakistan that claimed more than 500 lives. Nongtdu, a Kashmiri resident, barely had time to rush to the third floor of her house before water burst through her gate and inundated the first and second floors. Last September, Hamberton Nongtdu woke to a loudspeaker at a nearby mosque blaring a warning: Floods were coming. Philip is a senior researcher at the Institute for Environmental Studies of the VU University Amsterdam. This blog was co-written with Hessel Winsemius and Philip Ward.
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