Semi-quantitative precipitation forecasts for Kosi/Mahananda catchment by synoptic analogue method

Authors

  • K. M. SINGH Retd. Scientist, Shanti Kunj, Mausam Colony, Patna – 800 014, India
  • M. C. PRASAD Retd. Scientist, Shanti Kunj, Mausam Colony, Patna – 800 014, India
  • G. PRASAD Retd. Scientist, Shanti Kunj, Mausam Colony, Patna – 800 014, India
  • R. PRASAD Retd. Scientist, Shanti Kunj, Mausam Colony, Patna – 800 014, India
  • M. K. JHA Retd. Scientist, Shanti Kunj, Mausam Colony, Patna – 800 014, India

DOI:

https://doi.org/10.54302/mausam.v61i2.799

Keywords:

Synoptic, Catchments, Quantitative Precipitation Forecasts (QPF), Mean rainfall, Frequency, Range, Seasonal trough, Homogeneous rainstorm, Vigorous, Active, Oscillation

Abstract

An attempt has been made to issue semi-quantitative precipitation forecasts for Kosi/Mahananda catchment by synoptic analogue method. Based upon 22 years of data (1982 - 2003) the study reveals that it is possible to issue semi­-quantitative forecasts with confidence.

Local topography of the catchments and its steep gradient from Bhim nagar to Chatra / Brahkshetra in Kosi and hills in Darjeeling are favourable regions where moist air masses of the Bay of Bengal and the Arabian Sea during South West Monsoon in lower troposphere converge and trough at 500 hPa especially diffluent in rear creates divergence and moist air mass is pulled up resulting in heavy / very heavy rainfall in sub montane districts of Bihar and Nepal Himalaya in addition to orographic effects. This gives birth to severe floods and makes the life of densely populated districts of  Pumea / Katihar / Saharsa / Kisanganj / Madhepura miserable and badly affects the economy of the region.

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Published

01-04-2010

How to Cite

[1]
K. M. . SINGH, M. C. . PRASAD, G. . PRASAD, R. . PRASAD, and M. K. . JHA, “Semi-quantitative precipitation forecasts for Kosi/Mahananda catchment by synoptic analogue method”, MAUSAM, vol. 61, no. 2, pp. 175–186, Apr. 2010.

Issue

Vol. 61 No. 2 (2010): MAUSAM

Section

Research Papers

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