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  • Streamflow trends in the Mahanadi River basin (India): linkages to tropical climate variability.

    Author(s) : Panda, D. K.Kumar, A.Ghosh, S.Mohanty, R. K.

    Author Affiliation : Directorate of Water Management (ICAR), Chandrasekharpur, Bhubaneswar 751 023, Odisha, India.

    Author Email : dileeppanda@rediffmail.com

    Journal article : Journal of Hydrology (Amsterdam) 2013 Vol.495 pp.135-149

    Abstract : Mahanadi River basin is one of the recognized climatic vulnerable regions of IndiaindiaSubject Category: Geographic Entities
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    . Recent occurrences of the extreme climatic events in this basin underscore the importance of evaluating the trend and variability of hydroclimatic variables in order to understand the potential impactimpactSubject Category: Properties
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    of future change. In this study, the monthly streamflow data for the period 1972-2007 and the daily rainfall data for the period 1972-2005 have been analyzed using the Mann-Kendall nonparametric test after removing serial correlation. The results reveal a substantial spatial and subseasonal difference in the monsoon season streamflow and rainfall patterns, with a predominance of the increasing trendstrendsSubject Category: Properties
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    in June and decreasing trends in August. However, a marked increase is observed in the streamflow and rainfall of the pre- and post-monsoon season. The correlation coefficients show a direct correspondence of the rainfall and streamflow series with the El Niño-Southern Oscillation (ENSO), which is contrary to the established inverse relationship over India. The noteworthy feature of this study is the observed climateclimateSubject Category: Climate Related
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    uncertainty in terms of large variability in the extreme indices since the 1990s, consistent with the warming induced intensification of the hydrological cycle. Strong evidences have emerged regarding the basin-wide increases in extreme rainfall indices. In particular, the coastal sector of the basin is more vulnerable to the heavy rainfall, whereas the southern Eastern Ghats region is susceptible to the moisturemoistureSubject Category: Miscellaneous
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    stressstressSubject Category: Miscellaneous
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    . The dischargedischargeSubject Category: Miscellaneous
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    at the basin outlet has declined at a rate of 3388×106 m3 decade-1, suggesting the need of environmental flow assessmentassessmentSubject Category: Techniques, Methodologies and Equipment
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    . The results of this study would help the reservoir managers and policypolicySubject Category: Miscellaneous
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    makers in planning and management of water resourceswater resourcesSubject Category: Miscellaneous
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    of the Mahanadi River basin.

    ISSN : 0022-1694

    DOI : 10.1016/j.jhydrol.2013.04.054

    Record Number : 20133238396

    Publisher : Elsevier Ltd

    Location of publication : Oxford

    Country of publication : UK

    Language of text : English

    Indexing terms for this abstract:

    Descriptor(s) : assessmentassessmentSubject Category: Techniques, Methodologies and Equipment
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    , climateclimateSubject Category: Climate Related
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    , dischargedischargeSubject Category: Miscellaneous
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    , effectseffectsSubject Category: Properties
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    , El Nino-Southern Oscillationel nino-southern oscillationSubject Category: Climate Related
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    , evaluationevaluationSubject Category: Techniques, Methodologies and Equipment
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    , flowflowSubject Category: Miscellaneous
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    , hydrologyhydrologySubject Category: Miscellaneous
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    , impactimpactSubject Category: Properties
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    , indexesindexesSubject Category: Miscellaneous
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    , moisturemoistureSubject Category: Miscellaneous
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    , monsoonsmonsoonsSubject Category: Climate Related
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    , ocean currentsocean currentsSubject Category: Climate Related
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    , policypolicySubject Category: Miscellaneous
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    , rainrainSubject Category: Climate Related
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    , riversriversSubject Category: Habitats
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    , stream flowstream flowSubject Category: Miscellaneous
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    , streamsstreamsSubject Category: Topographic Features
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    , stressstressSubject Category: Miscellaneous
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    , trendstrendsSubject Category: Properties
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    , tropicstropicsSubject Category: Climate Related
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    , variationvariationSubject Category: Properties
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    , water resourceswater resourcesSubject Category: Miscellaneous
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    , watershedswatershedsSubject Category: Topographic Features
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    , wet seasonwet seasonSubject Category: Climate Related
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    Identifier(s) : catchment areas, El Nino, ENSO, rainfall, rainy season, tropical countries, tropical zones

    Geographical Location(s) : IndiaindiaSubject Category: Geographic Entities
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    , Pacific Oceanpacific oceanSubject Category: Geographic Entities
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    Broader term(s) : Commonwealth of Nationscommonwealth of nationsSubject Category: Institutions and Organisations
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    , Developing Countriesdeveloping countriesSubject Category: Miscellaneous
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    , South Asiasouth asiaSubject Category: Geographic Entities
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    , AsiaasiaSubject Category: Geographic Entities
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