A small city gets its drinking water from the river running through its center. This river is fed by rivers that flow down the mountains nearby. How would excessive rainfall in the mountains most likely affect the turbidity of this local water source? A. Heavy rainfall would decrease the turbidity of the river downstream. B. Heavy rainfall would increase the turbidity of the river downstream. C. Heavy rainfall would increase the turbidity of only rivers upstream. D. Heavy rainfall would decrease the turbidity of only rivers upstream.
Question
A small city gets its drinking water from the river running through its center. This river is fed by rivers that flow down the mountains nearby. How would excessive rainfall in the mountains most likely affect the turbidity of this local water source? A. Heavy rainfall would decrease the turbidity of the river downstream. B. Heavy rainfall would increase the turbidity of the river downstream. C. Heavy rainfall would increase the turbidity of only rivers upstream. D. Heavy rainfall would decrease the turbidity of only rivers upstream.
Solution
B. Heavy rainfall would increase the turbidity of the river downstream.
Here's why:
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When there is heavy rainfall in the mountains, it causes more soil and sediment to be washed into the rivers that flow down the mountains.
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This increased amount of soil and sediment in the water increases the turbidity of the rivers. Turbidity refers to the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye.
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As these rivers feed into the river running through the city, they bring with them the increased sediment and soil, thereby increasing the turbidity of the river running through the city.
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Therefore, heavy rainfall in the mountains would most likely increase the turbidity of the river downstream in the city.
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