Word: sediment
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Dates: during 2000-2009
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...scheduled to begin in 2008, would occur in stages, and if it goes as planned, the Pacific Northwest will lose only a tiny amount of hydropower and regain a legendary salmon fishery. But there could be problems. Behind the Elwha dams are some 18 million cubic yards of accumulated sediment, enough to fill four superdomes, and if a lot of that sediment starts to move downstream at once, the ecological consequences could be severe...
...elongated into an ellipse as the coral (which seeks warm waters) migrated toward the shallows north of the original crater. Some 1.8 million years ago, the atoll contained an inland sea continually replenished by ocean waters. But as the rising coral walls gradually closed out the ocean, newly deposited sediments' piled up in the forming lagoon. The inland sea shrank, the basin filled with fresh water and, in the warm southern sun, soon became clogged with the rich grasses that formed the Everglades. Central Florida's Lake Okeechobee, says Petuch, is the last remnant of that great, sediment-filled lake...
...already a slim margin of safety. Making the problem even worse is the loss of what Florida International University coastal expert Stephen Leatherman calls "living landforms," which would otherwise buffer that rise. Consider the wetlands that are an integral part of all river deltas, he says. Plants trap sediment from floodwaters flowing downriver, and the more they trap, the higher these wetlands grow. The problem is, people don't much like floods, so they build levees, which keep sediments from washing out of the rivers. They also don't much like wetlands, so they drain them. As a result...
...along the lake floor. Scientists think that the trenches, similar to those on ocean bottoms, are carved by currents of water that can also disperse toxic material. Other investigators will concentrate on collecting two shrimp like organisms in the food chain, including Ponto-poreia hoyi, that dwell on the sediment and may ingest toxic chemicals...
According to students on-hand, the water coming from the sprinkler had an odor and was full of black and brown sediment...