How does water-use affect water-quality?
Excessive water use affects water quality. High demands and overuse of water resources increases nonpoint pollutants. Surface withdrawals can alter in stream flows. Excessive withdrawals contribute to saltwater intrusion in groundwater. And runoff rate increases due to over-irrigation of agricultural land. Runoff water from agricultural lands are potential carriers of pollutants like sediments, organic solids, chemicals from pesticides, soluble nutrients like selenium and iron, and microorganisms, all of which contribute to the degradation of water quality.
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