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Quality of a River - Water Quality
Temperature: Consequences (pg 4 of 5)

Matters of SCALE

Changes that force a rise in temperature may make a stream no longer able to sustain fish such as trout. Changes can be small in scale and relatively short-lived or large in scale and relatively permanent. Beaver dams, for example, slow current and cause water to spread out into sunny ponds, raising temperatures in a small segment of the stream.

However, human alterations to the watershed can have even more dramatic effect. The types of dams that humans construct tend to be massive and more permanent. The impacts caused by these dams can extend the entire length of the river.

Other types of alterations, though subtle, can have far-reaching impacts. Clearing trees along a stream corridor or paving large surfaces in the watershed can permanently increase fluctuations in both stream temperature and runoff.



Luther Aadland
See Luther Aadland
Reservoirs increase stream temperature

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Temperature
Oxygen
Alkalinity
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