Demarcating a river basin is very important for planning and development of water resources. There are twenty two huge river basins in India according to the Central Water Commission.

River Basin
A river basin is the part of land through which a main river and all its tributaries flows. It is the basic hydrological unit for planning and development of water resources of a country.
In India, there are various river basin classified by different organizations – India WRIS (Water Resource Information System) Basin, NCIWRDP (National Commission for Integrated Water Resources Development Plan) Basin, AISLUS (All India Soil and Land Use Survey) Basin, CGWB (Central Ground Water Board) Basin and CWC (Central Water Commission) Basin. CWC has classified 22 basins in India (Fig.1).
River basin

Fig.1-River basin of India as classified by CWC (Source India WRIS)

The 10 largest river basins (area wise) in order of highest to lowest, classified by CWC are as follows:

Ganga Basin

Ganga River

 

It is the largest basin in India with area about 861452 sq. km. It originates from the Gangotri glacier in Himalaya and traverses about 2,525 km across the states of Uttarakhand, Uttar Pradesh, Bihar, Jharkhand and West Bengal before falling into the Bay of Bengal. Its principal tributaries are Yamuna, Chambal, Banas, Kali Sindh, Parbati, Sind, Betwa, Dhasan, Keri, Gomti, Sarda, Ghaghara, Gandak, Son, Damodar, and Hooghly, Ramganga, and Mahananda.

Basin of West Flowing Rivers of Kutch and Saurashtra including Luni

Basin of West Flowing Rivers of Kutch and Saurashtra including Luni

 

This basin with an area of 321851 sq. km, has many independent rivers – Luni, Shetrunji, Bhadar, Machhu, Rupen, Saraswati and Banas of which Luni constitutes the major river system of the basin. Luni originates from western slopes of the Aravalli ranges, in the Ajmer district of Rajasthan and travels 511 km before falling into the Arabian Sea. Luni’s principal tributaries are Lilri, Guhiya, Bandi, Sukri, Jawai, Khari Bandi, Sukri Bandi, Sagi and Jojri.

Indus Basin Up to the Indo-Pak border

indus-river

 

This basin has an area of 321289 sq. km. Indus originates around Mansarovar Lake in the Himalaya and travels a total length of 2880 km before entering into the Arabian Sea. In India it flows through the state of Jammu and Kashmir and covers a length of 1114 km. Its principal tributaries are Shyok, Jhelum, Chenab, Ravi, Beas, Satluj and Ghagghar.

Godavari Basin

Godavari River

 

Godavari a 1465 km long river that originates from Trimbakeshwar in the Nashik district of Maharashtra. It receives all its water through a basin of area about 312812 sq. km. Godavari flows through Maharashtra, Telangana and Andhra Pradesh and finally falls into Bay of Bengal. Principal tributaries are Pravara, Manjra, Purna, Penganga, Wardha, Wainganga, Indravati and Kolab.

Krishna Basin

Krishna River

 

It has an area of about 258948 sq. km. Main River Krishna originates from Jor village of Satara district of Maharashtra. It has length of 1400 km and flows through states of Maharashtra, Karnataka, Telangana and Andhra Pradesh and falls into Bay of Bengal. Its principal tributaries are Ghatprabha, Malprabha, Tungabhadra, Bhima, Musi and Munneru.

Brahmaputra Basin

Brahmaputra

 

This basin has area of about 194413 sq. km. Brahmaputra has total length of about 2900 km out of which it travels only 916 km in India through the states of Assam and Arunachal Pradesh. It originates from north of Kailash ranges just south of the lake called Konggyu Tsho and has many principal tributarie Lohit, Dibang, Subansiri, Jiabharali, Dhansiri, Manas, Torsa, Sankosh, Teesta, Burhidihing, Desang, Dikhow, Dhansiri, and Kopili.

Mahanadi Basin

mahanadi basin

 

The total area of the basin is 141589 sq. km which spreads over five States Chhattisgarh, Odisha, Madhya Pradesh, Jharkhand and Maharashtra of which most of the area lies in Chhattisgarh and Odisha. Manandi originates near Farsiya village of Dhamtari district of Chhattisgarhand traverse 851 km in the states of Chhattisgarh and Odisha and falls in Bay of Bengal. Its principal tributaries are Seonath, Hasdeo, Mand, Ib, Ong, Tel and Jonk.

Basin of East Flowing Rivers between Pennar and Kanyakumari

Ponnaiyar River Basin of East Flowing Rivers between Pennar & Kanyakumari

 

This has two river systems: River system between Pennar and Cauvery and between Cauvery and Kanyakumari rivers having total area of about 100139 sq. km and constitutes many independent rivers such as Kandleru, Swarnamukhi, Arani, Korttalaiyar, Cooum, Adyar, Palar, Gingee, Ponnaiyar, Vellar, Varshalei, Vaigai, Gundar, Vaippar and Tambraparni. All rivers fall into Bay of Bengal.

Narmada Basin

Narmada River

 

This basin covers area of about 98796 sq. km in states of Madhya Pradesh, Gujarat, Maharashtra and Chhattisgarh. Narmada River (length1312 km) originates from Maikala range near Amarkantak in Anuppur district of Madhya Pradesh and flows through states of Madhya Pradesh, Maharashtra and Gujarat. Its principal tributaries are Burhner, Banjar, Sher, Shakkar, Dudhi, Tawa, Ganjal, Kundi, Goi, Karjan, Tendoni, Barna, Kolar, Man, Uri, Hatni and Orsang.

Basin of East Flowing Rivers between Mahanadi and Pennar

Musi river

 

This has three river systems: the river systems between Mahanadi and Godavari; river systems between Krishna and Pennar; and, a small area between Godavari and Krishna drained mainly by the small stream of Palleru. Total area of basin is 86643 sq. km and has many independent rivers such as Rushikulya, Bahuda, Vamsadhara, Nagavali, Sarada, Varaha, Tandava, Eluru, Gundlakamma, Musi, Paleru and Manneru. All rivers fall into Bay of Bengal.

Endnote:

Many other smaller but significant basins, with large number of people depending on it for their livelihood, have not been mentioned here. The remaining CWC classified basins are Cauvery, Tapi, West Flowing Rivers from Tadri to Kanyakumari, West Flowing Rivers from Tapi to Tadri, Pennar, Brahmani-Baitarni, Barak and other minor rivers basins.


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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.

    [wptelegram-join-channel link=”https://t.me/s/upsctree” text=”Join @upsctree on Telegram”]

    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.