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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

Manipur Assembly to meet at 4 pm today, floor test likely under new chief minister

The Manipur Legislative Assembly will convene at 4 pm today, with a floor test likely as the new chief minister seeks to prove his majority in the House.

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Manipur assembly

The Manipur Legislative Assembly will convene at 4 pm on Thursday in Imphal, a day after Yumnam Khemchand Singh was sworn in as the chief minister. A floor test is likely to be held on the first day of the session to establish the majority of the newly formed government.

In the 60-member Assembly, the BJP holds 37 seats, while its ally National People’s Party has six members, giving the ruling combine a clear majority in the House.

Singh chaired the first Cabinet meeting of his government late Wednesday evening, shortly after taking oath as the 13th chief minister of Manipur. The meeting marked the formal start of administrative functioning under the new Council of Ministers.

His appointment came nearly a year after the resignation of former chief minister N Biren Singh, who stepped down following months of ethnic violence between the Meitei and Kuki communities in the state.

After taking oath, Singh thanked Prime Minister Narendra Modi and said he would work with “utmost diligence to advance development and prosperity in Manipur,” aligning the state’s efforts with the vision of Viksit Bharat.

He said the government’s focus would be on inclusive economic growth while preserving Manipur’s cultural heritage, adding that he would discharge his responsibilities with sincerity and dedication, mindful of the trust placed in him.

The summoning of the 12th Manipur Legislative Assembly by Governor Ajay Kumar Bhalla, along with the first Cabinet meeting, signals the resumption of legislative and administrative processes in the state, officially bringing President’s rule to an end.

The sixth session of the 12th Manipur Legislative Assembly was last held from July 31 to August 12, 2024.

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PM Modi skips Lok Sabha reply as protests force repeated adjournments

PM Modi did not deliver his Lok Sabha reply today after sustained Opposition protests led to repeated adjournments over a dispute involving Rahul Gandhi’s proposed speech.

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PM Modi

Prime Minister Narendra Modi did not deliver his scheduled reply to the Motion of Thanks on the President’s address in the Lok Sabha today after sustained Opposition protests led to multiple adjournments of the House.

The disruption followed an escalation of tensions linked to Congress leader Rahul Gandhi’s proposed speech and the suspension of eight Opposition MPs a day earlier. The situation worsened after remarks made by BJP MP Nishikant Dubey during the proceedings.

Dispute over references to books sparks fresh ruckus

The controversy intensified when Nishikant Dubey responded to Rahul Gandhi’s demand to speak on national security and references to the unpublished memoirs of former Army chief General MM Naravane. Dubey said that while Gandhi wanted to quote from an unpublished book, he himself had brought several books that, according to him, made claims about the Gandhi family.

As Dubey began listing these books and their contents, strong protests erupted from Opposition members. Krishna Prasad Tenneti, who was presiding over the House at the time, cited Rule 349, which restricts members from reading out books, newspapers, or letters unless directly related to parliamentary business. Despite repeated warnings, the matter remained unresolved, leading to another adjournment.

Rahul Gandhi accuses government of silencing debate

Earlier in the day, Rahul Gandhi alleged that he was being prevented from speaking on an issue of national importance. He claimed the government was uncomfortable with references to General Naravane’s memoirs, which he said discussed the handling of the 2020 China border crisis.

In a social media post, Gandhi said he intended to present the Prime Minister with a book authored by the former Army chief, adding that some cabinet ministers had even questioned the existence of the book. He also wrote to Lok Sabha Speaker Om Birla after the suspension of eight Opposition MPs, alleging that parliamentary debate was being curtailed.

After it became clear that the Prime Minister would not speak in the House today, Gandhi posted that PM Modi had avoided Parliament because he was “scared” to face the truth. Congress MP Priyanka Gandhi Vadra echoed the allegation, claiming the Prime Minister was unwilling to enter the House.

Proceedings disrupted throughout the day

Lok Sabha proceedings were first adjourned until 2 pm amid loud protests over the issue linked to Naravane’s memoirs. Even after the House reconvened, disruptions continued, preventing normal business from resuming.

Later, Congress MPs staged a demonstration outside the Parliament complex, demanding that Rahul Gandhi be allowed to speak on the President’s address.

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President’s Rule revoked in Manipur as NDA set to form new government

President’s Rule has been withdrawn in Manipur nearly a year after its imposition, paving the way for a new NDA-led government under Yumnam Khemchand Singh.

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President rule invoked in Manipur

President’s Rule has been revoked in Manipur nearly a year after it was imposed, clearing the way for the formation of a new government led by the BJP-led National Democratic Alliance (NDA). The decision came hours before the scheduled oath ceremony of the new council of ministers.

Chief minister-designate Yumnam Khemchand Singh is set to take oath later this evening, along with other NDA legislators who will formally join the new government. The revocation brings an end to central rule that had been in place since February 2025, following the resignation of then chief minister N Biren Singh.

Assembly status during central rule

During the period of President’s Rule, the Manipur Legislative Assembly remained in suspended animation, meaning it was neither functioning nor dissolved. With the restoration of the elected government, legislative activity is expected to resume.

Khemchand Singh, 61, belongs to the Meitei community. Two deputy chief ministers have been named to reflect Manipur’s ethnic diversity. Nemcha Kipgen, from the Kuki community, and Losii Dikho, from the Naga community, are set to take charge as deputy chief ministers.

According to people with direct knowledge of the matter, Nemcha Kipgen is likely to take oath from a Manipur government guesthouse in Delhi.

Key portfolios and leadership choices

Seven-time MLA from Bishnupur district, Govindas Konthoujam, said he has been entrusted with the Home portfolio. Emphasising stability and law and order, he said he remains committed to serving the state with discipline and restraint.

Sources said Khemchand Singh is viewed within the party as a non-polarising leader who is acceptable across internal factions at a time of political transition. While he is yet to be tested in governance, he is seen as a steady administrative choice capable of providing organisational discipline and continuity amid uncertainty.

Uneasy peace continues in Manipur

The formation of the new government comes against the backdrop of continued tension in Manipur, nearly three years after violence erupted between the Meitei community in the valley areas and the Kuki tribes in several hill districts.

A section of Kuki groups has been demanding a separate administrative arrangement, with negotiations involving multiple insurgent groups operating under two umbrella organisations that are signatories to the suspension of operations agreement.

In recent weeks, some Kuki civil society organisations have stated they would not participate in the Manipur government and have distanced themselves from Kuki MLAs expected to join the new administration.

A day before the announcement of the new government, Kuki leader Paolienlal Haokip posted on X that representatives of the Kuki Zo people could not take part in leadership selection without justice and a written commitment for political settlement.

Diverging demands from communities

Meitei civil society groups have maintained that all internally displaced persons should be allowed to return home safely, even as dialogue continues. However, Kuki leaders have insisted that a political solution in the form of a separate administration must come first, before discussions on rehabilitation and return from relief camps.

Meitei leaders have countered this position, arguing that the demand reflects an ethnocentric territorial claim and that humanitarian issues should be addressed alongside negotiations, as no area is exclusively inhabited by a single community.

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