20 Jun '17, 10am

via @YaleE360

A similar appreciation of the role that dams play in robbing rivers and wetlands of much-needed sediment flows is now moving to the forefront of ecological studies and river engineering. The need to restore sediment flows to coastal environments has become more urgent in recent decades as development, agriculture, aquaculture and other human activity has destroyed or badly damaged about two-thirds of the world’s wetlands. Some 90 percent of the wetlands in San Francisco Bay are gone, and 75 percent of the wetlands in southern California have disappeared. Some restoration projects are now underway, but sediment — and an economically efficient way to deliver it — is urgently needed. Wetlands — including marshes, sea grass beds, estuaries, and mangroves — are remarkably rich and productive ecosystems, providing nesting habitat and nurseries for fish, birds, and other wildlife...

Full article: http://e360.yale.edu/features/why-the-worlds-rivers-are-l...

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via @YaleE360

via @YaleE360

e360.yale.edu 29 Jun '17, 11am

Sonali McDermid, a climatologist at New York University, has been working to better understand this gathering threat and h...