Climatic Change

, Volume 47, Issue 1–2, pp 141–165 | Cite as

Anthropogenic, Climatic, and Hydrologic Trends in the Kosi Basin, Himalaya

  • Keshav P. Sharma
  • Berrien MooreIII
  • Charles J. Vorosmarty


A great debate exists concerning theinfluence of land-use and climatic changes onhydrology in the Himalayan region and its adjacentplains. As a representative basin of the Himalayas, westudied basinwide land-use, climatic and hydrologictrends over the Kosi Basin (54,000 km2) in themountainous area of the central Himalayan region. Theassessment of anthropogenic inputs showed that thepopulation of the basin grew at a compound rate ofabout one percent per annum during the past fourdecades. The comparison of land-use data between thesurveys made during the 1960s and 1978–1979 did notreveal noticeable trends in land-use change. Theanalysis of meteorological and hydrological timeseries from 1947 to 1993 showed some increasingtendency of temperature and precipitation. Thestatistical tests of hydrologic trends indicated anoverall decrease in discharge on the Kosi River andits major tributaries. The decreasing trends ofstreamflow were more significant during the low-flowmonths. The statistical analysis of homogeneityshowed that the climatic as well as the hydrologictrends were more localized in nature lacking adistinct basinwide significance.


Precipitation Climatic Change Himalayan Region Anthropogenic Input Major Tributary 
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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Keshav P. Sharma
    • 1
  • Berrien MooreIII
    • 2
  • Charles J. Vorosmarty
    • 2
    • 3
  1. 1.Department of Hydrology and MeteorologyKathmanduNepal
  2. 2.Institute for the Study of Earth, Oceans, and SpaceUniversity of New HampshireDurhamU.S.A.
  3. 3.Department of Earth SciencesUniversity of New HampshireDurhamU.S.A.

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