Kushiyara River

Coordinates: 24°37′36″N 91°46′42″E / 24.6266°N 91.7782°E / 24.6266; 91.7782
Source: Wikipedia, the free encyclopedia.

Kushiyara river, Sylhet

The Kushiyara (

romanized: Kuśiara Nôdi) is a transboundary river in Bangladesh and Assam, India. It forms on the India-Bangladesh border as a branch of the Barak River, when the Barak separates into the Kushiyara and Surma. The waters that eventually form the Kushiyara originate in the uplands of the state of Assam and pick up tributaries from Nagaland and Manipur.[1]

From its origin at the mouth of the Barak, also known as the Amlshid bifurcation point,

Bhairab Bazar.[4] Altogether, the Kushiyara runs about 160 kilometers. At its deepest during the rainy season the Kushiyara can reach a depth of 10 meters.[1]
During the dry season it can appear to dry up almost completely in a few places with the bulk of the load being carried subsurface, such as in the braided stream area south of Ajmiriganj Bazar.

In 2022 India and Bangladesh signed an interim water sharing pact with regard to the Kushiyara River.[5]

Limnology

In 2018 a limnology study was completed by the Department of Fisheries from the University of Dhaka and the Department of Environment and Natural Sciences from Yokohama National University in Yokohama, Japan, based on the data that they collected,[6] the water quality parameters measured at the seven study areas along the Kushiyara River are relatively consistent. The temperature ranges from 28.2 °C to 29.2 °C, with most study areas having a temperature around 28.5 °C to 28.9 °C. The dissolved oxygen (DO) levels are also consistent, ranging from 6.73 mg/L to 7.09 mg/L.

Transparency, which measures water clarity, varies more widely among the study areas, with values ranging from 36.0 cm at Jamargaon to 50.0 cm at Monumukh. This suggests that there may be differences in the number of suspended particles or algae present in the water at these locations.[6]

The pH values at all study areas are within a narrow range of 6.4 to 6.9, indicating that the water is slightly acidic to neutral. Electrical conductivity (EC) and total dissolved solids (TDS) values are also relatively consistent among the study areas, with EC ranging from 76.7 µS/cm to 81.6 µS/cm and TDS ranging from 38.1 mg/L to 40.9 mg/L.[6]

Salinity, as measured by the percentage of NaCl, is low at all study areas, with values ranging from 0.1% to 0.2%. This indicates that the water in the Kushiyara River is fresh and not influenced by seawater intrusion.[6]

See also

  • List of rivers in Bangladesh

Notes and references

  1. ^ a b Tahmina Ahmed (2021). Sirajul Islam (ed.). "Kushiyara River". Banglapedia: National Encyclopedia of Bangladesh. Asiatic Society of Bangladesh. Retrieved 2 September 2022.
  2. ^ a b Alam, M. J. B.; Alam, R.; Uddin, M.; Nahar, T. (2007). "Study of Morphological Change of the Kushiyara and Monu Rivers by Remote Sensing". International Journal of Sediment Research. 22 (2): 159–167.
  3. ISBN 978-0-415-08834-3
    .
  4. ^ Uddin, Misbah (2010). Assessment of Morphological Aspects of Kushiyara-Monu River System (PDF). Masters Thesis. Dhaka: University of Engineering and Technology.
  5. ^ Roy, Shubhajit (7 September 2022). "Delhi, Dhaka sign river pact, first in 25 years; Hasina praises Modi". Indian Express. Archived from the original on 6 September 2022.
  6. ^
    ISSN 2070-0245
    .

24°37′36″N 91°46′42″E / 24.6266°N 91.7782°E / 24.6266; 91.7782

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