Red Mountain Creek, Ouray County, Colorado

KNOW YOUR STREAMFLOW: Dissolved and undissolved particles


Dissolved and undissolved particles become suspended in a stream in a variety of ways such as natural erosion, acid rock drainage from mines, acid runoff over mine waste, and runoff from streets and highways. Other…

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KNOW YOUR STREAMFLOW: How minerals and sediment change rivers


A stream like the Uncompahgre River transports many substances as it flows through a variety of geologic, land use, vegetation, and urban areas. The substances include suspended bits of soil and rock, organic material, nutrients,…

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historic flood in Ouray, photo courtesy of Denver Public Library

KNOW YOUR STREAMFLOW: The effect of landslides


Surface water erosion is the primary cause of landslides. When intense periods of rainfall or snowmelt saturate the landscape, it softens the soils mixed within various sizes of rocks and boulders below ground level. The…

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KNOW YOUR STREAMFLOW: The power behind flooding


Streamflow is the volume of water flowing past a certain point on a waterway at any given time of day. Heavy rains and snowmelt can produce runoff at a rate that exceeds the drainage capacity…

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