Effect of baseline snowpack assumptions in the HySIM model in predicting future hydrological behavior of a Himalayan catchment

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dc.contributor.authorRemesan, Renji
dc.contributor.authorBegam, Sazeda
dc.contributor.authorHolman, Ian P.
dc.date.accessioned2018-12-04T12:18:52Z
dc.date.available2018-12-04T12:18:52Z
dc.date.issued2018-11-23
dc.description.abstractGlaciers and snowpacks influence streamflow by altering the volume and timing of discharge. Without reliable data on baseline snow and ice volumes, properties and behaviour, initializing hydrological models for climate impact assessment is challenging. Two contrasting HySIM model builds were calibrated and validated against observed discharge data (2000–2008) assuming that snowmelt of the baseline permanent snowpack reserves in the high-elevation sub-catchment are either constrained (snowmelt is limited to the seasonal snow accumulation) or unconstrained (snowmelt is only energy-limited). We then applied both models within a scenario-neutral framework to develop impact response surface of hydrological response to future changes in annual temperature and precipitation. Both models had similar baseline model performance (NSE of 0.69–0.70 in calibration and 0.64–0.66 in validation), but the impact response surfaces differ in the magnitude and (for some combinations) direction of model response to climate change at low (Q10) and high (Q90) daily flows. The implications of historical data inadequacies in snowpack characterization for assessing the impacts of climate change and the associated timing of hydrological tipping points are discussed.en_UK
dc.identifier.citationRemesan R, Begam S, Holman IP. (2019) Effect of baseline snowpack assumptions in the HySIM model in predicting future hydrological behavior of a Himalayan catchment. Hydrology Research, Volume 50, Issue 2, April 2019, pp. 694-708en_UK
dc.identifier.issn1998-9563
dc.identifier.urihttps://doi.org/10.2166/nh.2018.069
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13690
dc.language.isoenen_UK
dc.publisherIWA Publishingen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectclimate changeen_UK
dc.subjectevapotranspirationen_UK
dc.subjectimpact response surfaceen_UK
dc.subjectsnowpacken_UK
dc.subjectTRMM3B42V7en_UK
dc.subjectuncertaintyen_UK
dc.titleEffect of baseline snowpack assumptions in the HySIM model in predicting future hydrological behavior of a Himalayan catchmenten_UK
dc.typeArticleen_UK

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