https://e360.yale.edu/features/why-the-worlds-rivers-are-losing-sediment-and-why-it-matters
“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.”
The most important things!
https://www.americanrivers.org/2018/06/plan-released-for-klamath-river-dam-removal/
“The Klamath River project will be the most significant dam removal and river restoration effort yet. Never before have four dams of this size been removed at once which inundate as many miles of habitat (4 square miles and 15 miles of river length), involving this magnitude of budget (approximately $397 million) and infrastructure.
But perhaps more important than the size of the dams is the amount of collaboration and the decades of hard work that have made this project possible. American Rivers has been fighting to remove the dams since 2000. And thanks to the combined efforts of the Karuk and Yurok tribes, irrigators, commercial fishing interests, conservationists, and many others, our goal of a free-flowing river is now within reach.”
Biggest dam removal ever! Klamath was largest salmon producer until dams interrupted reproduction cycles.
http://www.scpr.org/news/2017/01/09/67954/proposed-federal-water-bill-would-streamline-new-d/
“The bill would codify into federal law the 1994 Bay Delta Accord, an agreement between state and federal authorities to coordinate water use and quality standards for water in the California Delta, where the confluence of the Sacramento and San Joaquin rivers enters Suisun Bay and flows toward the Pacific Ocean. Making the accord a federal law would restore water deliveries to Central California users that were “cut off by environmental lawsuits and a series of illogical regulations,” Valadao says in the bill’s summary.”
Stream lining dam project process good for farmers but what about the environment?
http://qz.com/797380/reservoirs-methane-emissions-climate-change/
Katherine Ellen Foley on the problem with “clean” hydropower. “Globally, the reservoirs created by dams may actually contribute almost a gigaton of carbon dioxide-equivalent emissions—about 25% more than they had previously thought. This means that we’ve almost certainly been underestimating how much greenhouse gas we’ve been shooting into the atmosphere.”
Another reason to let rivers run their natural course….too late to stop China’s 3 River Dam on Yangtze.
http://www.washingtontimes.com/news/2015/may/17/historic-2011-us-and-canada-flooding-prompts-water/
Excerpt from WashingronTimes on historic flooding:
IJC Future steps could include recommendations for flood control structures, such as a dam that was begun in the 1930s in Quebec but was never finished.
Low-lying areas around the lake in Vermont and New York were inundated by the spring runoff that kept the lake above flood stage for more than two months in 2011.
Read more: http://www.washingtontimes.com/news/2015/may/17/historic-2011-us-and-canada-flooding-prompts-water/#ixzz3aS5dC7cc
Follow us: @washtimes on Twitter
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Another externality from Dam control and diversions. Inter basin water transfers and foreign biota and invasive species. Excerpt from ‘Dire’ USGS REPORT:
“If Asian carp spread into the Great Lakes, knowing where to expect them to spawn is a critical step in controlling these invasive species,” said USGS scientist Elizabeth Murphy. “Our study combines the biology of Asian carp early life stages with the physics of rivers to identify potential spawning tributaries, thus giving managers an opportunity to develop targeted control strategies.”
The researchers studied four tributaries for their report: the Milwaukee and St. Joesph Rivers leading to Lake Michigan, and the Maumee and Sandusky Rivers that connect Lake Erie. Scientists have long believed that although adult carp prefer calm waters, carp eggs must be carried along fast currents or else they sink and die. However, it is now found that the river does not necessarily have to be lengthy for the eggs to survive. Given the right temperatures and water-quality characteristics, even short rivers will do. All four tributaries in the study proved sufficient for carp to spawn. This discovery, according to the report, “would expand the number of possible tributaries suitable for Asian carp spawning.”
Scientists also found that dams can be instrumental in creating “settling zones” where the Asian carp eggs collect and sink. Unfortunately, the settling zones caused by dams or natural features in the studied tributaries were not enough to stop the development of Asian carp young, which only required a relatively short distance before they hatched.
The Council of Great Lakes Governors met again for the first time since 2005 earlier this month to discuss the future of invasive species in the region, foremost being the siege laid against the lakes by Asian carp. According to Fox News, Illinois Governor Pat Quinn supported a national project to separate the Great Lakes and Mississippi river systems.
“Ultimately, I think we have to separate the basins,” Quinn said at the meeting. “I really feel that is the ultimate solution.”
Lake Levels 