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No end to discolouration of Periyar
Why in news?
- Discolouration of water continued in the Periyar river.
- Water turned pitch black in one stream, it was milky near the regulator near the Pathalam regulator-cum-bridge.
More in news
- Eutrophication is the cause:(1) Environment Surveillance Centre said the discolouration was due to the poor quality of water as a result of eutrophication.(2) When excessive nutrients reach the waterbody, it will lead to algal bloom.(3) A few days later, algae will die and decay, resulting in a foul smell and discolouration of water.(4) Water in some reaches of the river system has been stagnant. Reduced water flow in the system has added to the deteriorating water quality.
- What is eutrophication?(1) Eutrophication is the response to the addition of nutrients such as nitrates and phosphates naturally or artificially, fertilizing the aquatic ecosystem.(2) cEutrophication occurs naturally due to deposition of nutrients [such as in depositional environments] carried by flood waters. It takes over centuries for eutrophication to occur naturally.
Source
The hindu