Word: sedimenting
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...Basically, when there is a break of thismagnitude, a pressure front travels through thesystem stirring up sediment including manganese,"said Grene. Manganese occurs naturally in thesystem and is always present in tap water, thoughin smaller quantities...
...littered with plastic and tar balls and rapidly losing fish. But the garbage dumps, the oil spills, the sewage discharges, the drift nets and factory ships are only the most visible problems. The real threats to the oceans, accounting for 70% to 80% of all maritime pollution, are the sediment and contaminants that flow into the seas from land-based sources -- topsoil, fertilizers, pesticides and all manner of industrial wastes. Coral is particularly sensitive to sediment, and the reefs that fringe Asia, Australia and the Caribbean -- and provide a home to many of the world's fish species -- are already...
...sleepy cotton fields around New Madrid, Mo. (pop. 3,400), convey no sense of seismic menace. Yet scientists say the area is potentially one of the most dangerous earthquake zones in the world. Early in the past century an unseen fault, obscured by tons of sediment, unleashed a fearsome trio of tremors -- each as powerful, some say, as the earthquake that virtually destroyed San Francisco in 1906. The eyewitness accounts read like the tall tales of Baron Munchhausen. The ground rippled with waves as though it were an ocean. The Mississippi River raged with waterfalls and rapids. Fountains of sand...
...alarming rate of one acre every 16 minutes, has already drawn up an ambitious mix of programs. In the biggest project, a $24 million pumping station would divert millions of gallons of silt-rich Mississippi River water onto the coastline to help stop saltwater intrusion and to supply sediment that will build up the eroding land. At least one parish is considering plans for a backstop dike to give residents time to escape should the sea finally reach their doors...
...green Great Wall" of grasses, shrubs and trees 4,350 miles across their northern region. In Peru archaeologists have revived a pre- Columbian agricultural system that involves dividing fields into patterns of alternating canals and ridges. The canals ensure a steady supply of water, and the nitrogen-rich sediment that gathers on their floors provides fertilizer for the crops...