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What do you understand by the term water quality, and what factors control its variation in time and space?
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| Submitted: Thu Jul 11 2002
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What do you understand by the term water quality, and what factors control its variation in time and space? Water quality can be described as the physical, chemical and biological characteristics of water, and is a broad term encompassing the quality of water held within river channels and lakes, but also groundwater, water held in sol, rainwater, and water in the oceans. As far as humans are concerned water quality is of primary importance in the freshwater resources which make up only a small percentage of the Earth's water resources, and therefore I shall focus primarily on water quality in river channels and lakes for the purpose of this essay. Water quality is controlled by a multitude of factors which are clearly variable over time and space and which can be grouped into natural and man-made influences. Whether the source of water is underground (groundwater) or directly from rain washing over...
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