Drainage Water Quality
Water may be polluted by local or large-scale sources, in most cases chemical / organic, inorganic and radioactive /, usually related to tae intensive use of fertilizers, pesticides, herbicides, insecticides and fungicides which are non-degtadeable. Chémical sources endangering the quality of waters are often joined by bacteriological sources / viruses, bacteria, germs / and by physical sources. The natural medium has a certain self-purification capability which is intensively manifested especially in the aeration zone. This selfpurification capability is, however, limited and its irreplaceable function must not be overcome by the intensity of contamination.
KeywordsDrainage Water Drainage Group Nitrogen Substance Aeration Zone Protect Water Resource
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