Junior science refresher Published this article page no 137 Pollution Explosive increase in the urban population has resulted into disposing of untreated local sewage and solid waste in to urban lakes and in many cases these water bodies have been ultimately turned into landfills. Eutrophication The entry of nutrients through raw sewage cause various destructive changes in the lakes such as prolific growth of aquatic weeds in lakes and ponds that ultimately disturb and kill the ecology of the waterbody. Encroachment Due to rapid economic development even a small piece of land in urban areas has a high economic value. Hence these urban water bodies are no more acknowledged for their ecosystem services but as real estate leading to high scale encroachment. Illegal Mining Activities Illegal mining for building material such as sand and stones on the catchment and the bed of the lake also have extremely damaging impacts on the waterbody. Unplanned Tourism Activities Lack of systematic planning and regulation and absence of garbage disposal facilities has contributed to the degradation of many water bodies especially at the highaltitude lakes for example Dal Lake in Srinagar. Cultural Misuse The misuse of these water bodies by local communities for their cultural or religious festivals such as the immersion of idols are particularly a source of serious pollution in lakes. Institutional Arrangements for the Protection of Lakes in India Junior science refresher buy.
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