River Name: Dudhkumar

1. General Information

1.1 Description

The Dudhkumar is a transboundary river in the northwestern region Bangladesh, flowing parallel to the Teesta and Dharla. It originates in the Chumbi Valley of Tibet and is named after the Indian Raidak or Mankosh River after entering Bangladesh through Shilkhuri Union of Bhurungamari Upazila of Kurigram district. The Shilkhuri Union part of the river in Bhurungamari Upazila is locally called Kaljani. Most of the main course of the Dudhkumar is in India. The river flows through India for a large part of its main course before joining the Brahmaputra/Jamuna River in Kaliganj Union of Nageshwari Upazila of Kurigram district. It is a perennial river and overflows its banks during the monsoon season. The Dudhkumar is prone to flash floods and extensive erosion.

1.2 River Type

In terms of dimension: Medium

In terms of seasonality: Perennial

1.3 Planform

Meandering

1.4 River Source/Entrance/Outfall

River/Lowland/Mountain/Sea	Mauza	Union	Upazila	District	Division	Latitude	Longitude
Tibet	Uttar Dhaldanga	Shilkhuri	Bhurungamari	Kurigram	Rangpur	26.2287596	89.63471628
Brahmaputra/Jamuna	Kumedpur	Kaliganj	Nageshwari	Kurigram	Rangpur	25.91348624	89.78332458

1.5 Length

54 km

1.6 Width

Max: 640 m, Avg: 460 m, Min: 290 m

1.7 River Flowing Location

Kurigram District: Nageshwari, Bhurungamari

1.8 Tributaries

Bashjani, Gadadhar, Phulkumar

1.9 Distributaries

Antai

2. Hydrological Information

2.1 Tidal Effect

2.2 Flow Data

Station Type	Station ID	Station	Max Flow (m³/s)	Min Flow (m³/s)	Avg Flow (m³/s)	Data Range	Data Source
Non-tidal	81	Pateswari	9250	52	437	1968-2006	NWRD

2.3 Water Level

Refer to the document for detailed station-wise water levels.

2.4 Catchment Area

386 km²

2.5 Bank Overtopping During Medium Flood

Yes

3. Morphological Information

3.1 Physiographic Unit

Active Brahmaputra-Jamuna Floodplain, Active Tista Floodplain, Teesta Meander Floodplain

3.2 Terrain Slope

11 cm/km

4. Water Uses

No specific irrigation or flood control projects listed.

5. Ecological Information

5.1 Ecologically Critical Area (ECA)

Not included in the list of Department of Environment (DoE)