Water Quality in Lakes and Reservoirs
Pure water does not exist in nature. There are a wide range of factors which can be used to define water quality that no simple definition exists. Water which is of excellent quality for certain purposes may be totally unsuitable for other purposes. However, the overall quality of the aquatic environment of lakes and reservoirs can only be fully described in terms of hydrology, physicochemistry, and biology. Changes in oxygen, pH, carbon dioxide, and other variables are often substantial during a 24 h period due to the influence of solar radiation on temperature and photosynthesis. There are therefore seasonal differences in water quality due to the impact on biological processes of differing lengths of daylight, temperature, and other factors.
Precipitation whether in the form of rain, snow, or ice washes gases and dust particles out of the atmosphere. The gases include oxygen, carbon dioxide, ammonia, and iron from industrial sources, sulfur dioxide, carbon monoxide,...
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