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Perennial to ephemeral transformation of a Lesser Himalayan watershed

hal.structure.identifierKumaun University
dc.contributor.authorRAWAT, Jiwan Singh
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierUniversity of Kerala [UoK]
dc.contributor.authorGOVIND, Ajit
hal.structure.identifierKumaun University
dc.contributor.authorRAWAT, Geeta
hal.structure.identifierBanaras Hindu University [Varanasi, India] [BHU]
dc.contributor.authorJOSHI, Mallickarjun
hal.structure.identifierInstitute of Hydrology
dc.contributor.authorRAI, Shive Prakash
hal.structure.identifierKumaun University
dc.contributor.authorGAHLOT, Navneet
dc.date.accessioned2024-04-08T12:01:56Z
dc.date.available2024-04-08T12:01:56Z
dc.date.issued2016
dc.identifier.issn0011-3891
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196179
dc.description.abstractEnUnder a changing climate, the Sub-Himalayan ecosystems are likely to experience marked transformations in hydrological, biogeochemical and biophysical processes. To explore this, we have been observing various hydrometeorological parameters in a completely rain-fed sub-Himalayan watershed (Salla Rauetella Watershed) since 1991. We noted a changing trend for some of the hydrometeorological parameters over the 22-yr period. While the annual air temperature has increased significantly, the annual rainfall also shows an increasing trend with a higher probability of increased rainfall intensity. The run-off data show a peculiar trend that the watershed has been transforming itself from a perennial to an ephemeral system, despite an increasing trend of rainfall magnitudes. This is primarily attributed to the increasing trends of rainfall intensities exceeding the infiltration capacities of the soil which trigger large but high-intensity run-off events with dry spells in other periods, which makes the river ephemeral. We infer a likely dynamic change in the run-off-generation mechanism which warrants the need for a more precise and rigorous observationcum- measurement strategy of ecohydrological processes in Himalayan ecosystems, supported with modelling and remote sensing approaches. This will help identify the optimal headwater treatment measures for augmenting groundwater to sustain the rainfed streams of the Himalaya under a changing climate. [ABSTRACT FROM AUTHOR] Copyright of Current Science (00113891) is the property of Indian Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.
dc.language.isoen
dc.publisherIndian Academy of Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enclimate change
dc.subject.enecosystem transformation
dc.subject.enprecipitation trends
dc.subject.enrun-off generation
dc.subject.enwatersheds
dc.title.enPerennial to ephemeral transformation of a Lesser Himalayan watershed
dc.typeArticle de revue
dc.identifier.doi10.18520/cs/v111/i4/686-693
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.journalCurrent Science
bordeaux.page686-693
bordeaux.volume111
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue4
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02637681
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02637681v1
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