Question

The town council votes to construct an energy plant on the bank of a large river. It uses river water in its cooling tanks and releases the wastewater back into the river. How might this activity affect the local watershed?

I. The energy plant will likely flood the area during heavy rainfall.
II. The energy plant will likely pollute the water flowing in front of it on the riverbank
III. The energy plant will stop all water flowing through the watershed.

II only
I and III
II and III
I, II, and III

Answer 1

The construction of the energy plant will likely pollute the water flowing in front of it on the riverbank.

The fact that the energy plant will use the water from the river for cooling means that the water will be exposed to thermal pollution. The increase in the temperature of the water will cause less dissolution of oxygen in the water.

As dissolved oxygen levels drop, the aquatic organisms in the river will become negatively affected due to the resulting oxygen stress and they may begin to die.

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