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

May 6, 2024May 7, 2024 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 NB 290424: Why is Climate Change not major election issue?

April 29, 2024May 2, 2024 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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DRP News Bulletin

DRP NB 220424: International Energy Agency accepts high-cost high risk hydro is no longer High Priority

April 22, 2024 SANDRPLeave a comment

The International Energy Agency (IEA) has accepted in its latest World Energy Investment Special Report titled “Reducing the Cost of Capital: Strategies to unlock clean energy investment in emerging and developing economies” has candidly accepted that hydropower (excluding pump storage) is no longer the high-priority sector.

Among the challenges hydropower faces, according to IEA, include long permitting time necessary considering the high and complex impacts of hydropower projects amd delays during construction. IEA figures show that the capacity of Chinese developed hydropower projects that had high proportion of installed hydropower capacity globally in any year for decades, was the lowest in 2023 since 2014. The report accepts that high cost of capital with high interest rates can have a major impact on Cost of electricity, affecting competitiveness of the hydropower projects.

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DRP News Bulletin

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

April 1, 2024May 1, 2024 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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DRP News Bulletin

DRP NB 250324: Celebrating 50 years of Chipko Movement and Message

March 25, 2024March 25, 2024 SANDRPLeave a comment

(Feature Image: A photo taken in March 1974 of people in Raini village, Uttarakhand, a few days after they protested against the felling of trees in order to make tennis racquets. Source: Varsha Singh/Third Pole report dated 30 Nov. 2022. The original photograph was taken on 30 March, 1974 by Chandi Prasad Bhatt and has been reproduced in The Third Pole with permission)

As we celebrate the golden jubilee of Chipko Movement, one of the most iconic and memorable environmental movements of India, we need to remember the key messages of the movement. It may seem gloomy situation at the place where the movement originated in Raini village in Chamoli district of Uttarakhand. In fact, as we travel from Raini to Chamoli to Uttarakhand and beyond, as far as environmental situation is concerned, there is not too much around us to celebrate about.

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Dams, Rivers & People · DRP News Bulletin

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

March 18, 2024March 18, 2024 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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Dams, Rivers & People

DRP NB 040324: Ganga Water not fit for even bathing in Uttarakhand, UP, Bihar, W Bengal

March 4, 2024March 6, 2024 SANDRPLeave a comment

(Feature Image: A drain falling into Ganga in Varanasi. Source: Amar Ujala)

A number of reports given below from this week shows that Ganga River water is not fit for even bathing at a number of locations in Uttarakhand, Uttar Pradesh, Bihar and W Bengal. These are all official statements, mostly given in reports submitted to judicial bodies or statements by the judicial bodies.

This shows how little progress has been achieved by the government, including by the Prime Minister, central and concerned state governments including by schemes like Namami Gange and scheme of National Mission for Clean Ganga and expenditure of tens of thousands of crores of rupees. This is in spite of the promises given in the past by the Prime Minister and Union Ministers including Nitin Gadkari to clean the river by deadlines that have come and gone.

The worst part is that if we look at the trajectory of various work being done in this regard, we see no hope of any improvement in the foreseeable future unless there is major change in the way this problem is dealt with. But how will such a major change happen?

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DRP News Bulletin

DRP NB 260224: Karnataka faces Drought, Farmer Distress, water scarcity

February 26, 2024February 28, 2024 SANDRP1 Comment

(Section 144 imposed near Bhadra Canals to stop illegal water lifting amid supply crisis. Representational image. TNIE)

As the two reports from media today shows, Karnataka is facing drought in 223 of 236 talukas, water scarcity and even farmer distress and suicides. The state government is aware of the situation and taking necessary measures. The situation could be similar in a number of states including Maharashtra, Telangana, Andhra Pradesh and even some of the eastern and northern states. The North Himalayan states have experienced hugely below normal snowfall in the ongoing winter. The Winter Rainfall at all India level for the period Jan 1 2024 to Feb 25 2024 is already 31% below normal.

There is role of global warming and El Nino in this and these factors are going to persist at least till the end of Indian Summer. So the governments both at centre and in states needs to be ready for the crisis.

The current Karnataka govt is awake to reality and seems to be taking the appropriate steps. Karnataka had deficit rainfall in SW Monsoon 2023.

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DRP News Bulletin

DRP NB 190224: NBWL decision of no clearance without compliance of previous projects

February 19, 2024February 19, 2024 SANDRPLeave a comment

The decision of National Board of Wild Life (NBWL) not to clear any projects affecting wildlife areas till there is compliance certificate from previous such projects is certainly welcome, was long overdue. We hope NBWL comes out with clearly defined norms for implementing this decision and also implements the decision in letter and spirit. Needless to add, the compliance certificate must come through an independent assessment done by a body that involves no conflict of interest and has independent track record.

Unfortunately, the news this week that NBWL has given green light to the Jamrani Dam in Uttarakhand without a clearance from National Tiger Conservation Authority (NTCA) is a significant dampener. Similarly, the past track record of NBWL, including the way it gave clearance to Ken Betwa River Link Project does not inspire too much confidence that NBWL is serious about this.

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DRP News Bulletin

DRP NB 120224: Report of Parl Com on Yamuna wants 23 cumecs water in the river

February 12, 2024 SANDRPLeave a comment

(Feature Image: Flowless Yamuna downstream Vyasi HEP, Dehradun in June 2023. Bhim Singh Rawat/SANDRP)

In a welcome move, the Parliamentary Committee report on Yamuna River has suggested at least 23 cumecs (Cubic Meters for Second) water needs to be released from Hathnikund barrage at least in nine non monsoon months from Oct to June as per the recommendation of the National Institute of Hydrology, a govt of India body. The report has said that almost no water is being released for the river from the Wazirabad barrage in Delhi.

The 10 cumecs water now being released (how regularly even this is being released is also a question) is inadequate as most of it evaporates or percolates soon after it is released. The committee has asked the Union Jal Shakti Minister to take urgent steps in this direction. In fact, the committee should have given a time limit for this. We hope these urgent steps will be taken soon.

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