In an era of extreme weather, concerns grow over dam safety

elwha-dam

Many of the United States’ 91,000 dams are aging and sorely in need of repairs that could collectively cost tens of billions of dollars. Experts are increasingly worried that as extreme precipitation events increase, dams are at greater risk of failure, threatening lives and posing environmental risks.

The California coast is disappearing under the rising sea. Our choices are grim

While other regions grappled with destructive waves and rising seas, the West Coast for decades was spared by a rare confluence of favorable winds and cooler water. But lines in the sand are meant to shift. In the last 100 years, the sea rose less than 9 inches in California. By the end of this century, the surge could be greater than 9 feet.

A massive seaweed bloom is smothering life from the Caribbean to West Africa

For eight years, thick mats of seaweed have smothered coral reefs, trapped sea turtles and brought economic instability to coastal communities as reddish-brown gobs of foul-smelling sargassum wash onto beaches along the Caribbean Sea, Gulf of Mexico and tropical Atlantic. These phenomena are symptoms of a massive seaweed bloom scientists are calling the Great Atlantic Sargassum Belt.

Coastal Hazards & Targeted Acquisitions: A Reasonable Shoreline Management Alternative: North Topsail Beach, North Carolina Case Study

This study is the first of several case studies to be released by the Program for the Study of Developed Shorelines examining the feasibility and economics of targeted acquisition strategies in oceanfront, resort communities. Buyouts of vulnerable properties have become an increasingly popular tool for reducing future exposure in flood-prone communities across the U.S.

Time is running out for sand

Sand and gravel are being extracted faster than they can be replaced. Monitor and manage this resource globally.