Himalayan glaciers make up about 17 per cent of the Himalayas and about 37 per cent of the Karakoram Range.

The water melted from Himalayan glaciers form the headwaters for many major river catchments in the Indian subcontinent. This discharge of headwater makes up for about 70 to 80 per cent of the melting of snow and ice from the highlands. In such a scenario, global warming and climate change can have significant impacts on the flow of water into river catchments.

The Impacts of Himalayan Glaciers on River Catchments

Contradicting reports by the Intergovernmental Panel on Climate Change (IPCC), Thayyen and Gergan (2009) argue that glacial retreat in the Himalayas will not necessarily result in greater headwater flow into Himalayan river catchments. Arguing that the previous view focuses only on glacial outlets, they cite Hasnain’s (2008) paper who observed that the adverse effect was in fact glacial shrinkage due to global warming that can in turn cause a high run-off. This however also could reduce the overall capacities of Himalayan glaciers to provide headwater.

Hasnain comments on the reduction in glacial dimensions with climate change and states that Himalayan glaciers as a water source cannot be assumed as permanent. He observes that Himalayan glaciers would need to maintain a specific mass balance of between 90 and 78 cm to prevent large scale loss of glacial ice. However, Himalayan glaciers are losing ice, and this could pose a serious threat to the availability of water in India and in adjoining regions linked to Himalayan river catchments.

Hasnain’s studies point towards that fact that Himalayan glacial run-off has increased in the recent past and shall continue to advance with the increase in glacial shrinkage. With enough glacial shrinkage, Hasnain expects significant decreases in the headwater discharged to river catchments. River catchments affected by headwater discharges from Himalayan glaciers such as the Ganges, Brahmaputra and Indus catchments are expected to greatly affected by glacial shrinkage, along with a host of other river systems drawing water from Himalayan glaciers. This could have severe implications for the discharge and availability of fresh water in areas fed by these river catchments.

Case Study: Hydrology of the Bhagirathi-Ganga Basin

The Bhagirathi river is one of the principal tributaries of the river Ganges and arises in the Gangotri glacier Goumukh. It forms a moauntainous catchment with the Ganges until it joins the Alaknanda, another tributary, at Devprayag to join with the river Ganges. The basin comprises water from 238 glaciers with a total ice volume of about 67.02 cu km. The average Monsoon precipitation in the headwaters for this basin is between 1,000 and 2,500 mm (Hasnain, 2008).

Investigations into the Dokriani Glacier were carried out by the Department of Science and Technology, GoI since the 1990s till the early 21st Century on discharge, precipitation and temperature measurements around the basin. The studies found that an increase in air temperature by 0.5oC since 1998 in the Dokriani Glacier valley had led to significant melting of glacier ice. Anomalouly high melting of the glacier has occurred due to excessive warming which has led to high run-off of glacial headwater, with an increasing rate of discharge.

The mass balance of the glacier was negative, with 80 per cent melting for the period. It is expected that with an increase in temperature by 1.5oC and an increase in Monsoon precipitation by 60 per cent, the seasonal run-off during the Monsoon season will increase to 100 per cent, which can severely deplete the glacier. The possible effects according to the research point towards reduced accumulation of snowfall, an increase in ablation due to heat, and reduced albedo due to the decrease in snowfall. If the run-off increases to 100 per cent, this can also lead to a decrease in the supply of fresh water in the basin due to inadequate replenishment of glacial ice, which can have significant implications for ecologies and lives downstream.


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  • Context:-

    At the recently concluded Leaders’ Summit on Climate in April 2021, Lowering Emissions by Accelerating Forest Finance (LEAF) Coalition, a collective of the United States, United Kingdom and Norway governments, came up with a $1 billion fund plan that shall be offered to countries committed to arrest the decline of their tropical forests by 2030.

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    What is LEAF Coalition?

    • Lowering Emissions by Accelerating Forest Finance (LEAF) Coalition, a collective of the United States, United Kingdom and Norway governments, came up with a $1 billion fund.
    • LEAF is supported by transnational corporations (TNCs) like Unilever plc, Amazon.com, Inc, Nestle, Airbnb, Inc as well as Emergent, a US-based non-profit.

    Why LEAF Coalition?

    • The world lost more than 10 million hectares of primary tropical forest cover last year, an area roughly the size of Switzerland.
    • Ending tropical and subtropical forest loss by 2030 is a crucial part of meeting global climate, biodiversity and sustainable development goals. Protecting tropical forests offers one of the biggest opportunities for climate action in the coming decade.
    • Tropical forests are massive carbon sinks and by investing in their protection, public and private players are likely to stock up on their carbon credits.
    • The LEAF coalition initiative is a step towards concretising the aims and objectives of the Reducing Emissions from Deforestation and Forest Degradation (REDD+) mechanism.
    • REDD+ was created by the United Nations Framework Convention on Climate Change (UNFCCC). It monetised the value of carbon locked up in the tropical forests of most developing countries, thereby propelling these countries to help mitigate climate change.
    • It is a unique initiative as it seeks to help developing countries in battling the double-edged sword of development versus ecological commitment. 
    • The initiative comes at a crucial time. The tropics have lost close to 12.2 million hectares (mha) of tree cover last year according to global estimates released by Global Forest Watch.
    • Of this, a loss of 4.2 mha occurred within humid tropical primary forests alone. It should come as no surprise that most of these lost forests were located in the developing countries of Latin America, Africa and South Asia.
    • Brazil has fared dismally on the parameter of ‘annual primary forest loss’ among all countries. It has lost 1.7 mha of primary forests that are rich storehouse of carbon. India’s estimated loss in 2020 stands at 20.8 kilo hectares.

    Brazil & India 

    • Between 2002-2020, Brazil’s total area of humid primary forest reduced by 7.7 per cent while India’s reduced by 3.4 per cent.
    • Although the loss in India is not as drastic as in Brazil, its position is nevertheless precarious. For India, this loss is equivalent to 951 metric tonnes worth carbon dioxide emissions released in the atmosphere.
    • It is important to draw comparisons between Brazil and India as both countries have adopted a rather lackadaisical attitude towards deforestation-induced climate change. The Brazilian government hardly did anything to control the massive fires that gutted the Amazon rainforest in 2019.
    • It is mostly around May that forest fires peak in India. However, this year India, witnessed massive forest fires in early March in states like Odisha, Uttarakhand, Madhya Pradesh and Mizoram among others.
    • The European Union’s Copernicus Atmospheric Monitoring Service claimed that 0.2 metric tonnes of carbon was emitted in the Uttarakhand forest fires.

    According to the UN-REDD programme, after the energy sector, deforestation accounts for massive carbon emissions — close to 11 per cent — in the atmosphere. Rapid urbanisation and commercialisation of forest produce are the main causes behind rampant deforestation across tropical forests.

    Tribes, Forests and Government

    Disregarding climate change as a valid excuse for the fires, Indian government officials were quick to lay the blame for deforestation on activities of forest dwellers and even labelled them “mischievous elements” and “unwanted elements”.

    Policy makers around the world have emphasised the role of indigenous tribes and local communities in checking deforestation. These communities depend on forests for their survival as well as livelihood. Hence, they understand the need to protect forests. However, by posing legitimate environmental concerns as obstacles to real development, governments of developing countries swiftly avoid protection of forests and rights of forest dwellers.

    For instance, the Government of India has not been forthcoming in recognising the socio-economic, civil, political or even cultural rights of forest dwellers. According to data from the Union Ministry of Tribal Affairs in December, 2020 over 55 per cent of this population has still not been granted either individual or community ownership of their lands.  

    To make matters worse, the government has undertaken systematic and sustained measures to render the landmark Scheduled Tribes and Other Traditional Forest Dwellers (Recognition of Forest Rights) Act, 2006 ineffective in its implementation. The Act had sought to legitimise claims of forest dwellers on occupied forest land.

    Various government decisions have seriously undermined the position of indigenous people within India. These include proposing amendments to the obsolete Indian Forest Act, 1927 that give forest officials the power to take away forest dwellers’ rights and to even use firearms with impunity.

    There is also the Supreme Court’s order of February, 2019 directing state governments to evict illegal encroachers of forest land or millions of forest dwellers inhabiting forests since generations as a measure to conserve wildlife. Finally, there is the lack of data on novel coronavirus disease (COVID-19) deaths among the forest dwelling population;

    Tardy administration, insufficient supervision, apathetic attitude and a lack of political intent defeat the cause of forest dwelling populations in India, thereby directly affecting efforts at arresting deforestation.

    Way Forward

    • Implementation of the LEAF Coalition plan will help pump in fresh rigour among developing countries like India, that are reluctant to recognise the contributions of their forest dwelling populations in mitigating climate change.
    • With the deadline for proposal submission fast approaching, India needs to act swiftly on a revised strategy.
    • Although India has pledged to carry out its REDD+ commitments, it is impossible to do so without seeking knowledge from its forest dwelling population.

    Tuntiak Katan, a global indigenous leader from Ecuador and general coordinator of the Global Alliance of Territorial Communities, aptly indicated the next steps at the Climate Summit:

    “The first step is recognition of land rights. The second step is the recognition of the contributions of local communities and indigenous communities, meaning the contributions of indigenous peoples.We also need recognition of traditional knowledge practices in order to fight climate change”

    Perhaps India can begin by taking the first step.