An upward change in water temperature, often exceeding the
tolerance limits for some forms of aquatic life. If no springs or feeder
streams are available to offer temporary refuge from these events, a
fish kill may ensue. Thermal pollution is the hallmark of tailwater
fisheries not managed for the life forms in the river, but rather only
for drinking or irrigation purposes. Enlightened views on water release
practices are gradually replacing such outdated thinking, and ecosystem
management prevails.
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