Dams - National Geographic Society
WEBJun 21, 2024 · A dam is a structure built across a stream or river to hold water back. Dams can be used to store water, control flooding, and generate electricity.
Why are we removing dams? | U.S. Fish & Wildlife Service
WEBFeb 20, 2024 · Of the nearly 100,000 dams blocking our nation’s rivers, the majority are nearly invisible. Underneath their murky waters, they halt the free flow and exchange of fish, nutrients and sediments, and they pose a deadly risk …
Dam | Definition, History, Types, Environmental Impacts, Examples ...
WEBSep 4, 2024 · dam, structure built across a stream, a river, or an estuary to retain water. Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes.
Beaver Dams: Nature's Solution for Freshwater Habitat Restoration
WEBApr 4, 2024 · Discover how beaver dams offer nature-inspired solutions for restoring freshwater habitats, promoting biodiversity, and managing water resources effectively.
How Dams Damage Rivers - American Rivers
WEBDams change the way rivers function. They can trap sediment, burying rock riverbeds where fish spawn. Gravel, logs, and other important food and habitat features can also become trapped behind dams.
Tearing out these dams will open rivers up for recreation—and …
WEBJun 1, 2021 · Tearing out these dams will open rivers up for recreation—and save lives. Environmentalists and adventurists push to remove archaic ‘drowning machines’ from the Midwest’s rivers. Spectators...
Sustainable Rivers Program - The Nature Conservancy
WEBMay 15, 2020 · By artificially stabilizing river levels, dams can set off cascading effects that negatively impact fish and wildlife, ecosystems and the diverse array of benefits they provide to people.
Is building more dams the way to save rivers? - National …
WEBOct 10, 2022 · For millennia, dams have been built across rivers and streams to irrigate farms, provide drinking water, and prevent flooding.
How dams have reshaped our planet - BBC
WEBA dam does so much more than submerge a valley to create a reservoir: it transforms a river’s natural course, accruing silt and sediment at an artificial barrier, and dampening water’s...
How dams can go with the flow | Science - AAAS
WEBSep 9, 2016 · Dams alter flow, sediment, and thermal regimes of rivers. Seasonal flow distortions (top) cause shifts in species compositions. Dammed rivers with hydropeaking (bottom) cause daily distortions that can eliminate key species from food webs.