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{{more sources|date=January 2022}}
{{Infobox river
| name = Karatoya River
| name_native =
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| image = BD Korotoa River.JPG
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| image_caption = Karatoya River near [[Mahasthangarh]]
| map = BD Map Rivers of North Bengal2.jpg
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| subdivision_type1 = Countries
| subdivision_name1 = India and Bangladesh
| subdivision_type2 = [[Divisions of Bangladesh|Division]]
| subdivision_name2 = [[Rajshahi Division|Rajshahi]]
| subdivision_type3 = [[Districts of Bangladesh|District]]
| subdivision_name3 = [[Bogra District|Bogra]]
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'''Karatoya River''' (also spelt '''Korotoa River''') is a small stream in [[Rajshahi Division]] of [[Bangladesh]].
[[File:Karatoa River.jpg|thumb|Karatoya River, winter 2007, Bogura]]

==Etymology==
The name of the river is formed of two Sanskrit words ''kar'' (hand) and ''toa'' (water).

==Course==
The Karatoya, known as Phuljhur rises in the Baikunthapur jungles in the extreme north-west of Jalpaiguri district (West Bengal, India) and forms for some distance the boundary between Dinajpur and Rangpur districts. It, then, meanders through Rangpur and Bogura. In the south of Bogura district, it receives the Halhalia and the united stream is then known as Phuljhur. It leaves Bogura at Chanda kona and flowing in a southerly direction past Raiganj and Shujapur is joined by the [[Ichhamati River|Ichhamati]] at Nalka. The Phuljhur then flows south past the important village of Ullapara, a few miles below which it joins the [[Hurasagar River|Hurasagar]] at Narnia after a course of about {{convert|40|mi|km|disp=flip}} in this district. After this junction, it takes the name of Hurasagar and passing close by Shazadpur and Hera joins the Jamuna near Bera.

===Course changes===
[[File:Dr. M A Wazed Miah Bridge at Kanchdaha.jpg|thumb|Dr. M A Wazed Miah bridge over Karatoya river in Kanchdaha, Rangpur.]]
The Karatoya is one of the rivers that has changed over the years. Previous rivers that the Karatoya connected to include the [[Teesta River|Teesta]] and [[Kosi River|Kosi]] rivers.<ref name = "RCMajumdar">{{cite book |last=Majumdar |first=R. C. |author-link=R. C. Majumdar |year=1971 |title=History of Ancient Bengal |location=Calcutta |publisher=G. Bhardwaj & Co. |pages=4-5 |oclc=961157849}}</ref>

The map (''right'') shows the main rivers in North Bengal and adjoining areas. Not shown are numerous tributaries and distributaries, which connect the main rivers, and allow the main rivers to change course. Therefore, the river-system pattern undergoes continuous changes. Such changes have not been reflected in the map. Moreover, many of the rivers have local names for sections of the course, adding to the complexity of the river system.

The Karatoya is made up of four parts and connects adjoining rivers.<ref name = "Banglapedia">{{cite book |last=Chowdhury |first=Masud Hasan |year=2012 |chapter=Karatoya River |chapter-url=http://en.banglapedia.org/index.php?title=Karatoya_River |editor1-last=Islam |editor1-first=Sirajul |editor1-link=Sirajul Islam |editor2-last=Jamal |editor2-first=Ahmed A. |title=Banglapedia: National Encyclopedia of Bangladesh |edition=Second |publisher=[[Asiatic Society of Bangladesh]]}}</ref>

==History==
The Karatoya is mentioned in the Puranas and had a high repute for sanctity. It was the eastern boundary of the old kingdom of [[Pundravardhana]], the country of the Paundras. In the classical period, it formed the western boundary of [[Kamarupa]], and later the [[Kamata kingdom]]. It is shown in Van Den Brouk's map of Bengal (C, 1660) as flowing into the Ganges and in fact. before the destructive floods of 1787 it brought down to the Atrai and to the Ganges a great volume of Teesta water. Since the main stream of the Teesta was diverted to the east in 1787, the Karatoya and the Phuljhur have gradually silted up. and they are at the present day rivers of minor importance. One channel, which joins the Baral, {{convert|30|mi|km|disp=flip}} east of Pabna. is still called indifferently the Buri Teesta or old Teesta and the Karto or Karatoya. Traces of an old channel, for which the name of the Karatoya is claimed, are also pointed out in the Chatmohar thana, where it appears to have been obliterated by the Baral.

[[Image:Van de Brook's map.jpg|250px|thumb|right|Van den Brouck's map]]
[[Image:Rennel's Map.jpg|250px|thumb|right|Rennel's map]]

During the early 1100s, the [[Ganges]] was three times smaller than the Karatoya according to the ''Siyar-al-Mutakhkhirin''. By the late 1600s, the river had become a channel according to a map by Ven den Brouck.<ref name = "Banglapedia"/> During the late 1700s, [[James Rennell]] created additional maps.<ref>Majumdar, S.C., Chief Engineer, Bengal, ''Rivers of the Bengal Delta'', Government of Bengal, 1941, reproduced in ''Rivers of Bengal'', Vol I, 2001, p. 45, published by Education department, Government of West Bengal.</ref>

==References==
{{reflist}}

==External links==

{{Rivers in and around Bengal}}
{{coord|24|13|N|89|36|E|type:river_source:kolossus-cawiki|display=title}}

[[Category:Rivers of Bangladesh|Karatoya River]]
[[Category:International rivers of Asia]]
[[Category:Rivers of Rajshahi Division]]

Karatoya River - Revision history

AndreaV955081450: adjust section for clarity and improved wording

Ajay Kumar: Created a new article