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Floods in polluted rivers can pollute groundwater too: Study

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Floods in polluted rivers can pollute groundwater too: Study

[vc_row][vc_column][vc_column_text]File photo of the floods that submerged large parts of Chennai in December 2015. Photo credit: PTI

~By Bhavya Khullar

Scientists from Anna University studied groundwater samples taken before and after Chennai floods of December 2015 to probe effect of floods on water quality

New Delhi: A new study has pointed out that flooding in polluted rivers has the potential to make groundwater unsafe for human use.

In December of 2015, when Chennai was flooded and people were marooned, a team of scientists from Anna University was collecting groundwater samples along the Adyar river to investigate if the groundwater in this region was fit for human consumption.

Researchers collected water samples from 17 locations in December 2015 and April 2016, that is, during and after floods. They tested the samples for salt and heavy metal concentration, microbial load and their susceptibility to available antibiotics.

“We wanted to know if the city water met water quality parameters laid down by the Bureau of Indian Standards during and post-flood”, Lakshmanan Elango, professor at the Department of Geology of Anna University, who led this study, told India Science Wire.

The results showed that heavy metal and microbial load in groundwater samples was high. The samples contained microbes such as Enterobacter, Staphylococcus, Escherichia, Streptococcus, Vibrio, and Salmonella that are known to cause infections like dysentery, cholera, and typhoid in humans. These microbes were cultured with various antibiotics used in clinical practice to treat life-threatening infections, to know they were susceptible or resistant to drugs.

“The bacteria were sensitive to most antibiotics but some were resistant to nalidixic acid, which is alarming as antibiotic resistance can rapidly spread in the environment”, said Prof Elango. The results of the study have been published in journal Nature Scientific Data.

In addition, scientists found high genetic similarity between bacteria from various locations implying that they must have originated from a single domestic sewage source containing fecal matter. “Sewage must have washed off with flood water, which in turn inundates the wells that would have resulted in contaminating the ground water”, believes Prof Elango.

“Our findings show that floods have the potential to impact the microbial quality of ground water in affected areas. Based on our study, we advise that wells must be chlorinated and the public must be warned to avoid consuming ground water for drinking, at least for some months post floods”, he added.

The research team included Ganesan Gowrishankar, Ramachandran Chelliah, Sudha Rani Ramakrishnan, Vetrimurugan Elumalai, Saravanan Dhanamadhavan, Kartikeyan Brindha, Usha Antony, and Lakshmanan Elango. It was done in collaboration with the University of Zululand in South Africa and the National University of Singapore, and was funded by the Department of Science and Technology (DST).

(This article has not been edited by the APNLive staff. It is from an auto-generated syndicated feed provided by the India Science Wire)[/vc_column_text][/vc_column][/vc_row]

India News

PM Modi takes aim at critics with Dimagi Naxal remark at SRCC centenary address

PM Modi revived his dimagi Naxal remark at SRCC’s centenary celebrations and spoke about India’s development journey.

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PM Modi

Prime Minister Narendra Modi revived his ‘dimagi Naxal’ remark while addressing the centenary celebrations of Shri Ram College of Commerce (SRCC) in Delhi on Saturday, using the term to criticise his opponents.

Speaking to students at the Delhi college, PM Modi described the phrase as a “homeopathic pill” and said it had prompted those he described as “dimagi Naxals” to come forward and reveal their views.

The prime minister also used his address to speak to Gen-Z about India’s development journey and asked students to consider the challenges the country had faced in the past.

PM Modi recalls past crises

During his speech, PM Modi referred to the 2013 Kedarnath disaster and the 2008 global financial crisis while criticising the handling of national emergencies by previous governments.

He said the government at the time of the Kedarnath disaster was shaken and questioned its ability to respond to the crisis.

Referring to the 2008 banking crisis, PM Modi alleged that the government of the time failed to effectively deal with the situation and claimed that India’s banking system was pushed close to collapse.

Prime minister lists challenges faced by his government

PM Modi also highlighted several major global crises that occurred during his government’s tenure.

He mentioned the COVID-19 pandemic, the Russia-Ukraine war, disruptions to global trade and supply chains, and the crisis in West Asia.

The prime minister said there had been concerns that India would struggle during these crises but argued that the country had continued to move forward.

PM Modi’s earlier SRCC visit

PM Modi had earlier visited SRCC in 2013, when he was the chief minister of Gujarat. His speech at the college received significant attention, particularly on social media, ahead of the 2014 Lok Sabha election.

His latest visit came during the college’s centenary celebrations, where his address focused on young people, India’s development ambitions and the challenges faced by the country.

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India Metro Rail Network May Overtake US in 2 Years

India’s metro rail network has reached 1,170 km across 26 cities. Union minister Manohar Lal said the country could overtake the US in network length within two years.

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Manohar Lal Khattar

India is on track to become the country with the second-largest metro rail network in the world after China, with Union Minister Manohar Lal saying the country could overtake the United States within the next two years.

India’s metro rail network has now expanded to 1,170 km across 26 cities. The network is only 216 km shorter than the US metro rail network, which stands at 1,386 km, according to figures cited by the minister.

India’s metro network expands rapidly

Speaking after the inauguration of an extended metro service in Indore, Manohar Lal highlighted the pace at which metro connectivity has grown in India.

He said metro services were operational across just 245 km in five cities when Prime Minister Narendra Modi assumed office in 2014. The network has since expanded to 1,170 km across 26 cities.

The minister said India could overtake the US in terms of metro rail network length in the next two years and become the world’s second-largest country in this segment after China.

China currently has around 8,000 km of metro rail lines, according to the figures cited by the minister.

Indore metro extension inaugurated

The minister made the remarks after inaugurating an extended section of the Indore metro. The project was built at a cost of around Rs 2,850 crore.

The Indore metro was earlier operating commercially on a six-km stretch between Gandhi Nagar and Super Corridor-3 stations. Following the extension, the service will operate on a 17-km route between Gandhi Nagar and Malviya Nagar Chauraha.

Madhya Pradesh Chief Minister Mohan Yadav said the metro service would mark a new phase in Indore’s development. He also said the network would eventually be extended to Ujjain and other nearby areas.

India’s metro rail network: Key figures

  • India currently has 1,170 km of operational metro rail network.
  • Metro services are operational across 26 cities.
  • The US has around 1,386 km of metro rail network.
  • India is currently 216 km behind the US.
  • China has around 8,000 km of metro rail lines.
  • India’s operational network stood at 245 km across five cities in 2014.

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PM Modi returns to SRCC after 13 years, revisits 2013 glass full speech

PM Narendra Modi returned to SRCC after 13 years for its centenary celebrations, revisiting themes from his landmark 2013 address.

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PM Narendra Modi

Prime Minister Narendra Modi returned to Delhi University’s Shri Ram College of Commerce (SRCC) on Saturday, 13 years after his previous visit to the institution as Gujarat chief minister. 

His latest visit came as SRCC marked its centenary celebrations. Modi’s 2013 address at the college had attracted significant attention as he spoke about India’s youth, governance and the country’s demographic potential.

In 2013, Modi was Gujarat chief minister and had not yet been named the BJP’s prime ministerial candidate. He returned to the same campus this year as Prime Minister, having completed 12 years as Prime Minister and serving his third consecutive term. 

What PM Modi said at SRCC in 2013

The 2013 lecture was titled Emerging Business Models in the Global Scenario. The address also covered governance and India’s young population.

He described India’s youth as a source of national strength rather than simply a group of new-age voters. He also highlighted India’s demographic advantage and argued that the country needed to make better use of its young population.

One of the notable moments from the speech involved a glass of water.  Modi contrasted the conventional descriptions of a glass as half full or half empty and said he viewed it as full, with half containing water and the other half air.

The speech also included his remarks on technology and young Indians. Referring to an anecdote from a visit to Taiwan, Modi used the phrase “mouse-charmers” to describe Indians using computers and suggested that young Indians had the ability to influence the world through technology.

‘Minimum government, maximum governance’

Modi’s 2013 address also touched on governance. He spoke about the role of government and the need for better governance.

He also spoke about India’s potential in the 21st century. 

Modi returns as PM for SRCC centenary

The September 5 visit coincided with Teachers’ Day and SRCC’s 100th anniversary. The Prime Minister’s Office had announced that Modi would participate in the college’s centenary celebrations and address the gathering. SRCC was established in 1926 by industrialist and philanthropist Sir Shri Ram.

Earlier this year, Modi also met the SRCC governing body at his residence in April in connection with the college’s centenary celebrations and released a commemorative postage stamp marking the occasion. 

The return to SRCC came 13 years after his 2013 appearance at the college, when he addressed students as Gujarat chief minister.

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