Surfing Tags / Dams

Elwha River Still Changing Five Years After World’s Largest Dam-Removal Project: More than 20 million tons of sediment flushed to the sea

Erosion, Inform
Sep
9

Starting in 2011, the National Park Service removed two obsolete dams from the Elwha River in Olympic National Park, Washington. It was the world’s largest dam-removal project. Over the next five years, water carrying newly freed rocks, sand, silt and old tree trunks reshaped more than 13 miles of river and built a larger delta into the Pacific Ocean.

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A mourning orca mother carried her dead baby for days through the ocean

A grieving mother orca near Vancouver Island has been carrying her dead calf for four days, after refusing to leave her baby behind when the rest of her pod left. The sad display speaks to something deeper. Killer whales eat salmon, and a number of human practices, such as damming rivers, have taken a toll on native salmon populations.

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Hydropower in Cambodia could threaten food security of region

Dam, Erosion, News
Jun
4

Farmers and anglers in Cambodia depend on the Mekong River’s predictable seasonal patterns, but new dams for hydroelectricity are altering the hydrology of the river. These changes have the potential to threaten fish migration, livelihoods, and regional food security.

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A Balkan dam boom imperils Europe’s wildest rivers

Erosion, Inform
May
22

The Balkan Peninsula, one of Europe’s most undeveloped regions, is facing a wave of thousands of hydroelectric projects that would block pristine, free-flowing rivers and cause major environmental damage. Local residents and conservationists are fighting back.

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Seafloor erosion now occurring like coastal land loss

Erosion, News
Apr
4

Scientists have discovered that the seafloor from the Mississippi River Delta to the Gulf of Mexico is eroding like the land loss that is occurring on the Louisiana coast. During the 20th century, thousands of dams were built on Mississippi River tributaries stopping the flow of fine silt, clay and other sediment from reaching the delta and seafloor to offset erosion.

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The Mekong, Dammed to Die

Dam, Erosion, News
Nov
15

In Laos, the lush forests are alive with the whines of drills that pierce the air. On the Mekong, a giant concrete wall rises slowly above the trees. The Don Sahong dam is a strong symbol, not only for a power-hungry Asia but also for what critics fear is a disaster in the making.

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How a useless dam nearly destroyed an iconic beach; CA

elwha-dam
Dam, Erosion
Aug
31

The city of Ventura and environmental groups launched a $4 million beach-building project when the coastline eroded in the early 1990s because the Ventura River was no longer bringing enough sand and sediment to nourish the beach. The sand thief was 16 miles upstream: Matilija Dam.

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Why the World’s Rivers Are Losing Sediment and Why It Matters

Dam, Erosion, News
Jun
23

Now, as global warming steadily melts glaciers and polar ice sheets, quickening the pace of sea level rise, scientists say that a severe shortage of river-borne sediment — most of it trapped behind dams — will increasingly be felt along the world’s coasts.

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The Vanishing Nile: A Great River Faces a Multitude of Threats

Dam, Erosion, Inform
Apr
22

The Nile River is under assault on two fronts – a massive dam under construction upstream in Ethiopia and rising sea levels leading to saltwater intrusion downstream.

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