Rivers are changing all the time, and it affects their capacity to contain floods

The research highlights that river capacity to contain water is dynamic rather than static, influenced by rainfall patterns, sediment displacement, and human activity. By analyzing 67 rivers in the US over nearly 70 years, the authors found that temporary shifts in capacity are more frequent than previously assumed, often correlating with wetter or drier climate cycles. The document warns that ignoring these fluctuations in flood modelling increases risk, particularly in sediment-heavy tropical systems like the Ganges-Brahmaputra, and calls for the use of satellite imagery and real-time monitoring to better predict flood risks.

• Flooding is caused by a combination of heavy rainfall, the amount of moisture already present in the ground, and the specific capacity of river channels to contain water.
• River capacity is not static; it typically increases during wetter-than-average periods due to increased erosion and decreases during drier periods when there is less energy to move bed sediments.
• Analysis of 10,000 measurements across 67 US rivers over nearly 70 years shows that temporary shifts in river capacity lasting years or decades occur more frequently than previously assumed.
• Global climate cycles, specifically the El Niño Southern Oscillation, can cause river channel capacity to expand and contract on a global scale.
• Flood risk is significantly increased in regions with high sediment volumes or high rainfall variability, such as the Ganges-Brahmaputra river in India and Bangladesh, where sudden reductions in capacity can occur.

APA

Slater, A. K. R. W. L. (2019). Rivers are changing all the time, and it affects their capacity to contain floods. World Economic Forum. https://www.weforum.org/stories/nature-and-biodiversity/rivers-are-changing-all-the-time-and-it-affects-their-capacity-to-contain-floods-96cbd42b38/

Chicago

Slater, Abdou Khouakhi, Robert Wilby, Louise. Rivers are changing all the time, and it affects their capacity to contain floods. World Economic Forum, 2019. https://www.weforum.org/stories/nature-and-biodiversity/rivers-are-changing-all-the-time-and-it-affects-their-capacity-to-contain-floods-96cbd42b38/.

Wikipedia

{{cite report |last1=Slater |first1=Abdou Khouakhi, Robert Wilby, Louise |title=Rivers are changing all the time, and it affects their capacity to contain floods |publisher=World Economic Forum |date=14 November 2019 |url=https://www.weforum.org/stories/nature-and-biodiversity/rivers-are-changing-all-the-time-and-it-affects-their-capacity-to-contain-floods-96cbd42b38/ |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{slater2019rivers, author = {Slater, Abdou Khouakhi, Robert Wilby, Louise}, title = {{Rivers are changing all the time, and it affects their capacity to contain floods}}, institution = {World Economic Forum}, year = {2019}, month = nov, url = {https://www.weforum.org/stories/nature-and-biodiversity/rivers-are-changing-all-the-time-and-it-affects-their-capacity-to-contain-floods-96cbd42b38/}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }