Dams · DRP News Bulletin

DRP News Bulletin 12 February 2018 (With Innovative Ideas Hyderabad, Chennai & Delhi Are Reviving Its Wetlands)

This week there are exemplary and encouraging wetlands revival stories from three metro cities of Chennai, Hyderabad and Delhi.  In the first example from Hyderabad, meticulously chosen plant species such as tulsi, aswagandha, citronella and hibiscus have been used to create an artificial island to clean Neknampur Lake. The treatment islands are composed of four layers of which the bamboo base keeps the entire structure afloat. Based on soil-less hydroponics, these floating treatment wetlands absorb excess nitrates, thereby reducing the chemical content of the lake water. Microorganisms present in the wetland break down organic matter while the root systems filter out pollutants and sediments. https://www.thenewsminute.com/article/3500-saplings-floating-islands-help-rejuvenate-hyd-neknampur-lake-75819 (The News Minute, 3 Feb. 2018)

Image by: Madhulika Choudhary

Similarly, Chennai-based Care Earth Trust along with the public works department (PWD) and the civic body has managed to restore three urban lakes. While many of the smaller wetlands have vanished over time, many mid-sized wetlands seem to have shrunk by almost 65 percent. Thanks to their joint effort, invasive hyacinth was removed from the Narayanapuram Lake in Pallikaranai, while sewer lines, which emptied into the Perungalathur Lake, have now been plugged. A detailed restoration proposal has been forwarded to the PWD regarding the Korattur-Madhavaram-Ambattur lakes. https://timesofindia.indiatimes.com/city/chennai/hyacinth-out-sewer-line-plugged-three-water-bodies-restored/articleshow/62748110.cms (The Times of India, 2 Feb. 2018)

Meanwhile, Delhi Jal Board (DJB) has taken up interesting new project of creating an artificial lake in Dwarka. The project will supply water in sub-city and improve ground water level too. DJB has approved Rs. 56 crore for the project which will be completed in next seven months.  This would the first model project wherein a lake will be used to augment water supply. The special lake is being created next to the Dwarka water treatment plant (WTP) will have a sand bed to allow maximum percolation of water into the ground. It will have a capacity of 10 million gallons (MGD). The project is expected to add supply of 5-6 million gallons water to Dwarka every day.

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Dams

NAG – The River That Lends Life And A Name To Nagpur

Guest Blog by by Nivedita Khandekar

This story from Nag River in Nagpur is second in the series of online stories of urban rivers from across India. Please share your feedback and provide us with suggestions (read more in appendix). If you have any urban river stories or images that you might want to share, please send them to ht.sandrp@gmail.com and asid@veditum.org.

With an area of little over 200 sq kms, Nagpur, the geographical centre of India, is a lucky city to have 11 lakes and two rivers within municipal limits. Nag Nadi – which lends its name to the city – is the main river along with the other, Pili Nadi; the two later merge and further join the Kanhan river near the city outskirts.

It has always been believed that the river starts as an outflow from the western weir of Ambazari Lake in west Nagpur. In 1998, a bunch of researchers went to further explore the catchment of the lake and found the actual origin of the river is up north of the lake at a place called Lava, more than 25 kms from this western weir. 

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