Why most rivers don't respond to storms the same way twice
A study of over 80,000 river catchments across 97 countries reveals that most landscapes do not respond to rainfall in a predictable, linear fashion. Researchers found that 87% of evaluated land areas exhibit complex, dynamic behavior where rainfall-to-runoff patterns change based on prior weather conditions.
Why it matters
Understanding these complex hydrological systems is critical for improving flood forecasting and water resource management in an era of increasingly volatile climate patterns.
edited by Sadie Harley , reviewed by Robert Egan
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Add as preferred source Credit: Unsplash/CC0 Public Domain The same amount of rain falling on the same landscape at different times can send very different amounts of water into its rivers, according to a new study in Nature Water . The research offers a global picture of how catchments behave—not where rivers are or how much water they carry, but how consistently landscapes turn rainfall into river flow.
"We often imagine a catchment as a pipe—put in a certain amount of rain and get a predictable amount of runoff," said Dr. Ali Ameli, a hydrologist at the University of British Columbia (UBC) and lead author of the study.
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