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Indian History
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Bihar, India & World Geography
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4. Bihar and India Geography (Important Details)
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Bihar Current Affairs (CA) 2025
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71 BPSC ALL IN 1 English: PT [Hardcopy] + Mains [eBook in App] + Bihar Current Affairs [eBook in App] + National International Current Affairs: [eBook in App] English| Updated till Exam* | For All Bihar Exams (Copy 1)

4.11 Major River Systems Bihar

4.11.2. Major Rivers coming from the Plateau and merging with Ganges

Major River Systems  Bihar

Important Points

Tributaries 

1. Son River

 

● Total length – 780 km .     

● Length in Bihar – 202 km .     

** Origin – Amarkantak Peak (Madhya Pradesh)     

● Sangam – Ganges River (between Danapur and Maner)     

●  Famous as Hiranyawah and Sonbhadra, Son is the most major river of south Bihar     

● Narmada and Mahanadi also emerge from near the origin of Son      

● The Son river flows through Madhya Pradesh, Uttar Pradesh and Jharkhand, and enters Bihar via Rohtas district and finally joins the Ganges near Patna in Bihar.   

● The longest tributary river of the Ganges to be flowing in southern Bihar     

● Southwest Bihar’s most prominent irrigation scheme is based on the Son river.   

● The first dam on this river was made in Deori in 1873-74 .     

● Later, Indrapuri Barrage was constructed on this river in 1968 A.D.

** The 1440 m long rail – cum – road bridge was built on Son river in Koelvar near Aara in 1862 AD . It is currently famous as Abdul Bari Bridge . It is India’s Longest Rail Bridge

●  In 1900 A.D., The Nehru Rail Bridge was constructed on this river near Dehri .     

Gopad, Rihand, Kanhar and Northern Koel.

2. Phalgu River

 

● Total length – 235 km .     

● Place of origin – North Chotanagpur Plateau (Hazaribagh)     

● Sangam – Ganges River (Taal area)     

** Its main stream is called Niranjana.     

** On the Banks  Niranjana River Gautam Buddha had attained Enlightenment.     

● On the banks of the river ** Pitra Paksha Ka Mela is organized in which Pind Daan (offering of libations of water) of ancestors is done. 

    

The river is also known as the Antahsalila or Leelajan; this river is divided into two branches   near the Barabar hill in Jehanabad district.

Later, the Falgu river is divided into many branches -Bhutahi, 

Karrua ,Lokayan, 

Maha Twain etc.     

3. Punpun River

 

● Total length – 200 km .     

● Place of origin – Chota Nagpur Plateau (Palamu)     

● Sangam – Ganges River (near Fatuha)     

● It is a seasonal river     

● Also known as Kikat and Bamagdhi.     

●  Flowing parallelly to the Ganga river through Aurangabad, Arwal and Patna districts it merges with Ganga near Fatuha.     

Dardha, 

Yamuna, 

Madar, 

Bilaro, 

Ramrekha, 

Adri, 

Doba and Morhar Punpun

are the major tributaries

4. ** Ajay River

 

● Total length – 288 km .     

● Place of Origin – Batbarh (Jamui)     

● Sangam – Ganges (West Bengal)     

● It enters the Deogarh district in Jharkhand from Bihar.     

● It is also known as Ajayavati or Ajmati.     

● The river flows towards the east and south direction and enters Bengal and merges with river Ganges.       

 

5. Karmnasha River

 

● Total length – 192 km .     

● Place of origin – Sarodag (Kaimur)     

● Sangam – Ganges River     

● Karmnasha means –One who destroys karma     

● The river comes out of Sarodag (Kaimur) in the hills of Vindhyachal and joins the river Ganga near Chausa.     

**  This river, according to Hindu religious affiliations Is Considered Profane Or Unlucky.  

 

6. Chanan River

 

● This river is also called Panchanan.     

● Its original name is Panchanan, which started to be called Chanan due to the regular usage by the people.     

● This river is formed from five streams, hence is called Panchanan     

● . Major streams of this river – Paimar, Tilaiya, Dharanje, Mahane etc. come out from the Chotanagpur Plateau.     

●  All these streams flow in front of the Giriyak of Nalanda district, due to the barrier of Rajgir hill

 

Kyul River

 

● Origin – Hazaribagh Plateau     

● Enters near Satpadi in Jamui district in Bihar     

● Sangam – with Ganges near Suryagarha of Lakhisarai District.     

Major tributaries are Burner, 

Anjan, 

Harohar (halahal) etc.

Sakari River

 

●Place of origin – northern part of Chota Nagpur Plateau in Jharkhand (Hazaribagh Plateau)     

●Sangam – Ganges River     

●Flows in Gaya, Patna, Nawada and Munger     

●the river is also known as Sumagdhi      

  

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