DRP 060524: Study on dam induced river flooding in Peninsular India

May 6, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: (a) Locations of streamflow gauges with catchment boundaries in six major river basins of Peninsular India, (b) elevation map and mean annual maximum runoff rate (streamflow per unit catchment area), (c) Aridity Index (AI) and (d) Baseflow Index (BFI). The maps in first row are prepared in QGIS (Version 2.14.0 ‘Essen’ (2016), URL: http://qgis.org) and the maps in second row are generated using R (Version 4.2.2 (2022), URL: https://www.R-project.org/). Source: Baseflow significantly contributes to river floods in Peninsular India )

A recently published study, see details given below throws light on the role of groundwater contribution to baseflow in rivers and their flooding in Peninsular India’s river like Narmada, Tapi, Mahanadi, Godavari, Krishna and Cauvery. The found that while baseflow contributes more to river flows, its share in the flood event flow magnitude decreases as surface runoff accounts for a larger proportion of flood discharge on the day of the flood.

Most significant are the findings related to dam induced flood that SANDRP has been writing for long and the finding corroborate exactly what SANDRP has been saying: Sudden releases of water from a dam can raise river levels during extreme rainfall events, especially when the dam is nearly full. The impact of sudden floods is more destructive because people living in nearby areas are often unprepared. Without a dam, floodwaters rise slowly over time, allowing people to take preventive measures. However, sudden floods caused by dam releases offer little or no time to prepare, increasing the risks associated with dam-induced flood hazards. Furthermore, the construction of dams alters the natural regime of rivers, leading to changes in sediment transport and erosion patterns. These changes can heighten the risk of flooding downstream from a dam.

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DRP News Bulletin

DRP 290424: Why is Climate Change not major election issue?

April 29, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: Vehicles stuck in debris following a recent cloudburst at Saat Meel in Mandi, on August 20, 2023. (PTI Photo/Money Control)

World’s largest democratic exercise is now ongoing in India to elect the members of India’s Lok Sabha. Over 97 crores are eligible to vote in these elections. One of the biggest factors that is adversely affecting people across India currently is Climate Change. It is affecting almost every aspect of life and the adverse impacts are only increasing with every passing year. This is man-made disaster basically happening due to anthropogenic reasons, affecting air, water, climate, food, health, livelihoods, disasters and so on, affecting everyone. Currently, India is also a major contributor to the climate change causing green-house gas emissions, even though historically, the developed countries have contributed much more.

More importantly, the development options that the elected government choose will decide how the people will be impacted by climate change. The government has large number of options for pathways to development. Considering all this, one expected that climate change responses will be a major issue in these elections. But that is clearly not the case. BJP and Congress, two of the biggest parties fighting the elections, have mentioned climate change in their manifestos, but neither has dealt with this important issue with the detail and seriousness required. Nor are any of them making climate change a major election issue. One expects the ruling party to at least respond in greater detail and seriousness to this issue, but that is not the case.

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Yamuna River

Restore Yamuna Floodplain Raised by Illegal Soil Dumping near Shashtri Park, Delhi

April 20, 2024April 20, 2024 SANDRPLeave a comment

(Feature Image: Experts object elevation work on Yamuna floodplain in North East Delhi. Source: ToI, March 29, 2024)

This is an open letter to concerned government officials regarding restoration of Yamuna floodplain illegally raised and levelled by Forest Department, Delhi and DDA at Bela Farm near Shashtri Park, Delhi.

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DRP News Bulletin

DRP 150424: Supreme Court’s order on right to be free from climate change impact is welcome, BUT…

April 15, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: Polluted Hindon river flowing through Ghaziabad in March 2024. Bhim Singh Rawat/SANDRP)

On March 21, 2024, a case related to the Grean Indian Bustard, a critically endangered bird – numbering less than 150 individuals – has led the Supreme Court of India to expand citizens’ constitutional right to life and equality to include the right to be free from the adverse impact of climate change. The PIL filed by M.K. Ranjitsinh asked to protect the GIB from extinction. In 2021, in this PIL, the Supreme Court had passed directions restricting and regulating power lines and renewable energy projects in an area of 99,000 sq km in Rajasthan and Gujarat.

The Supreme Court’s latest order modified directions passed in the earlier judgment. Chief Justice D.Y. Chandrachud – writing for the 3-judge bench including Justices J.B. Pardiwala and Manoj Mishra – has expanded the contours of environmental jurisprudence: from the oft-repeated polluter pay principle–precautionary principle–public trust doctrine to the larger arena of climate justice, environmental inequity and gender justice. However, in the process, the protection the SC gave through earlier order has been withdrawn.

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DRP News Bulletin

DRP 080424: Demand to include River protection measures in election manifestoes

April 8, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: Ganga river at Garhmukteshwar in March 2024. Bhim Singh Rawat/SANDRP)

The demand of NAPM to political parties going to the National elections in next couple of months to include protection of rivers and communities dependent on rivers in their manifestoes is most appropriate and urgently required.

Some key components of the demand include strengthening of decentralized river governance, role in decision making related to rivers for the fisherfolks, boats people and other river dependent communities. A draft of the People’s River Protection Bill has also been sent to the political parties. The NAPM also opposed indiscriminate construction of dams, hydro projects, embankments, barrages, river front developments, illegal sand mining, dumping of solid and liquid waste in the rivers and also interlinking of projects, all being done in the name of development, with least concern for the rivers. The draft bill also demands removal of unjust encroachments into riverbeds and floodplains. NAPM also demands continued flow in the perennial rivers by way of adequate environment flows throughout the length of the rivers from origin to its confluence with other rivers or sea.

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Yamuna River

Yamuna Manthan 030424: DDA Continues to Destroy River Floodplains

April 3, 2024May 1, 2024 SANDRP1 Comment

(Feature Image: Huge part of Yamuna floodplain raised by massive soil dumping near Bela Estate just upstream Shashtri Park Metro Depot in North East Delhi. Photo Credit: Vivek Nigam, Photo Journalist Amar Ujala, Source: Principal Correspondent in Amar Ujala, Delhi)

In latest example proving Delhi Development Authority’s (DDA) utter failure in protecting Yamuna River floodplains from abuse and encroachment, a large part of floodplain land has been levelled by soil dumping thus raising it by several meters at Bela Estate farm near Shashtri Park Metro Depot. As per the reports, the DDA has allotted about 19.5 ha of floodplain to forest dept for compensatory plantation. The plantation work at the site like at most of the sites on Yamuna floodplain in Delhi has suffered damages during July 2023 floods. And the levelling at the Bela Estate site is being done in the name of protecting the compensatory plantation.

The site is among few remaining floodplain patches available for spread of flood waters. The floodplain area on western bank at the location is less and already developed. Due to natural gradient, the part of floodplain on eastern side undergoes periodic floods. The patch was under several feet floodwater in July 2023. The floodplain immediately downstream the site has already been encroached by the bridge road, metro depot and buildings. Hence, raising of floodplain here would not only reduce spread of flood waters but also hamper the groundwater recharge.

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DRP News Bulletin

DRP 010424: As Krishna basin faces drought and scarcity, water diverted from the basin to Konkan

April 1, 2024February 28, 2026 SANDRPLeave a comment

(Feature image: Map of Bhivpuri Hydropower Project, one of the Tata Dams)

Large parts of South India, including Maharashtra are facing depleted reservoir levels with the beginning of summer and water scarcity. However, the Krishna Bheema basin, the second largest basin of peninsular India, is diverting water to outside the basin to Konkan. The Krishna Bheema basin has the largest live storages of Maharashtra in Koyna dam (1347.5 MCM) and Tata dams (617.67 MCM), but the water in those storages won’t be available to the drought hit residents of Krishna basin in water scarce Maharashtra, Karnataka, Telangana and Andhra Pradesh.

This is because Koyna and Tata dams divert the water from Krishna Bheema basins to Konkan for power generation. Even in March, according to Maharashtra Load Dispatch Centre, Koyna had generated 128.87 Million Units (MU) of power and Tata Dams had generated 130.47 MU, both by March 30. This implies diversion of millions of Cubic meters of water from Koyna and Tata Dams during March 2024, which mostly gone down from Konkan to Arabian sea.

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Dams, Rivers & People · DRP News Bulletin

DRP 180324: Electoral Bonds disclosures confirm political economy of large dams

March 18, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: A controversy over alleged engineering lapses in the ₹1 lakh cr Kaleshwaram project on Godavari triggered an electoral slugfest. HT, 03 Nov. 2023)

The Electoral bonds details now in public domain, thanks to the Supreme Court of India orders, has once again highlighted the political economy of large dams, hydropower projects and irrigation projects. It has once again confirmed what was publicly known that such large water projects involve kickbacks to political parties.

The details so far available involves companies like Megha Engineering, Rithwick Projects Pvt Ltd, Navayuga Engineering Company Ltd, among others. The projects so far that seems to be involved include Polavaram Dam, Kaleshwaram Lift Irrigation Project, Sunni Dam and Hydro projects, Kundah Pump Storage Hydropower project in Tamil Nadu and Silkyara Tunnel, almost all of them also involved in some kind of disaster or other.

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Yamuna River

Yamuna Parliamentary Committee Report Missing on River Governance

March 12, 2024October 23, 2024 SANDRPLeave a comment

(Feature Image: Solid waste strewn along east bank of polluted river Yamuna near Geeta Colony bridge, Delhi on March 09, 2024. Bhim Singh Rawat/SANDRP)

The Parliamentary Standing Committee on Water Resources has submitted its 27^th report titled “Review of Upper Yamuna River Cleaning Projects upto Delhi and Riverbed Management in Delhi” to the Parliament on 6 Feb 2024. The 113 paged report has two parts first on Narration and second on Observation and 25 Recommendations. The first part of the report has XI chapters dealing with various issues of River Yamuna.

SANDRP here presents a detailed chapter wise overview of the key observations made by the Committee based on the replies mainly from Department of Water Resources, River Development & Ganga Rejuvenation (DoWR, RD & GR) along with the Committee’s recommendations and some comments by SANDRP.

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Dams, Rivers & People

DRP 110324: Bangalore reminds us: Ignore groundwater at your own peril

March 11, 2024February 28, 2026 SANDRPLeave a comment

(Feature Image: People stand in a queue with water cans to get drinking water at Jnana Jyothi Nagar, in Bengaluru. Image Source: PTI/Live Mint, 10 March 2024)

One central lesson of the ongoing Bangalore water crisis is essentially that ignore groundwater sustainability at your own peril. The surface water availability in Bangalore has not decreased, it is the groundwater depletion that is leading to crisis. There is of course the expansion of the city both horizontally and vertically that is increasing demands, but simple arithmetic tells us that if groundwater levels are sustained, it can take care of these increased demands.

The Groundwater sustainability includes sustaining the groundwater recharge and ensuring that extraction does not go past the recharge. Sustaining the groundwater recharge means first understanding the groundwater recharge mechanisms, zones and protecting them. BDA has been sitting for four years on desilting of two lakes: Bellandur and Varthur, which has caused huge impact on groundwater depletion. It also means increasing the groundwater recharge through rainwater harvesting (Bangalore’s failure here is apparent from the fact that government is collecting crores of rupees as fines from those not following the mandatory rainwater harvesting requirements), groundwater recharge wells and diverting tertiary treated sewage, available in Bangalore of upto 300 Million Liters per Day, to lakes and other such recharge zones.

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