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Politics : Formerly About Advanced Micro Devices
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To: pocotrader who wrote (1429051)12/16/2023 2:27:27 PM
From: Broken_Clock  Read Replies (1) of 1576160
 
usgs.gov

Along much of the West Coast, a legacy of clear-cutting, diking and dam-building has left lasting marks on the landscape. All affect the sediment amounts in different ways. Dams hold back not only water but the sediment within it, cutting off the supply to lower reaches of the river. Dikes and channels at the river mouth, built to keep tidewater out of agricultural land, focus the river’s flow into the ocean. This translates to less sediment accumulating alongshore, hastening erosion.

Clear-cutting strips the land of its soil-retaining plant cover and sends a glut of sediment down waterways and into the ocean. Hydraulic mining, a practice made popular in the 1800s by California gold-seekers, has a similar effect. Sediment released by these activities poured into bays and estuaries, smothering native ecosystems and clogging navigation corridors along the entire U.S. West Coast.
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