Is Chennai man-made or natural disaster?
Is Chennai man-made or natural disaster?
Chennai is a victim of man-made disaster. Its soil and rock types suggest that the city is historically a flood plain, says Chennai-based research Institute, Care Earth. The city is dotted with wetlands and natural channels where excess water from the city that is essentially a very flat area can be drained off.
Does Chennai really get enough rain to flood the city?
In fact, weathermen agree that it is only once is ten years that Chennai gets enough rain to flood the city. The rest of time, people pray for rain as groundwater levels deplete and water trucks whizz around delivering water to apartment complexes, villas and tenements. But last week it was different.
What happened to Chennai’s Great Marsh?
In 2002, a survey by the Tamil Nadu Pollution Control Board showed that that the marsh lost around 90 per cent of its original extent. This is also the year when the city observed a big flood event. The most affected areas were the adjoining areas around the marsh.
How does Chennai’s water system work?
Traditionally the sub-region surrounding Chennai had big and small ponds connected by a working overflow system. The water was allowed to spread into fields and thousands of smaller ponds, with the entire region acting as a ‘sponge’ to absorb the excess water, supporting paddy fields and fish farming.
What is the main cause of groundwater pollution in Chennai?
Moreover, the groundwater is highly polluted due to unplanned solid waste dumping; the effluents leached from these solid heaps and contaminated the groundwater. The recharge structures like lakes, tanks, ponds and other wetlands in the city have been disregarded and the natural course of water has been tampered.
Which marshland is known as flood sink area of Bangalore?
The southern marshland called Pallikarni marshland is known as the flood sink area of the city as it drained about 250 sq km of the city in the eighties. The marshland is housed in CMA. There were smaller wetlands around the marshland that served as a source of irrigation in the area that cultivated only paddy.
