Levees protect more than 7 million buildings in the US today, yet they got a D-plus grade in 2025. A new study found 487 cases where rising water overtopped levees in the past 15 years.
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None of the three main options could handle another Hurricane Harvey, but they would give varying benefits based on different sizes, costs and timelines.
An engineer who managed dams for years explains the tradeoffs operators make as they decide when to release water and how much to stay safe.
Australian cities remain woefully unprepared for the more extreme weather we are already seeing with climate change. But some cities overseas stand out for having developed readymade solutions.
We cannot think of nature as something set aside in wildernesses, far from human activity. We need to conserve some elements of nature everywhere, including in the cities we live in.
Proper dam management can help check flooding in Nigeria.
Top contributors
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Professor of Civil and Environmental Engineering and Director of the Iowa Flood Center, University of Iowa
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Professor of Geomorphology, Obafemi Awolowo University
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PhD Candidate in Water Resources Engineering, University of Iowa
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Professor of Civil and Environmental Engineering, Tufts University
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Vice-Chancellor's Research Fellow, Centre for Urban Research, RMIT University
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Professor, Biology Department, Concordia University
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Professor of Landscape Architecture and Urban Planning, Texas A&M University
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Professor of Civil and Environmental Engineering, Texas A&M University
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Associate Professor of Landscape Architecture and Urban Planning, Texas A&M University