DMPQ Premium- Describe the physiographical divisions of Bihar state.

Bihar is divided into three physiographic units on the basis of physical and structural conditions:

  • Shiwalik Range
  • Bihar Plain
  • Southern Plateau Region.

Shiwalik Range

This range shadows the state from Northern part of West Champaran district over an area 32 km long and 6-8 km wide and it is divided into sub-divided into three parts on the basis of variation:

  • Ramanagar Doon
  • Someshwar Range
  • Harha Valley

Bihar Plain

The  plains  of  Bihar,  adjoining  Nepal,  are drained  by  a  number  of  rivers  that  have  their catchments  in  the  steep  and  geologically  nascent  Himalayas.  Kosi,  Gandak, Burhi Gandak, Bagmati, Kamla Balan, Mahananda and Adhwara Group of rivers originates in Nepal, carry high discharge  and  very  high  sediment  load  and  drops  it  down  in  the  plains  of  Bihar. This plain is sub-divided into two parts on the basis of characteristics:

Northern Plain

It is located in East & West Champaran (Terai area with higher elevation), and Chaurs of Samastipur, Begusarai, Saharsa and Kathihar districts. Region is drained by Saryu, Gandak, Burhi Gandak, Bagmati, Kamla-Balan, Kosi and Mahanadi and their tributaries.

Southern Plain

It is narrow than northern plain of Bihar and triangular in shape because many hills are located in this region such as hills of Gaya, Rajgir, Giriak, Bihar Sharif, Sheikhpura, Jamalpur and Kharagpur hills.



Southern Plateau Region

It is located between Kaimur districts in the West to Banka in the East. It is made up of hard rock’s like gneiss, schist and granite. This region blessed with many conical hills which are made up of batholim like Pretshil, Ramshila and Jethian hill.

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