Publication:
The Applicability of SWOT’s Non-Uniform Space–Time Sampling in Hydrologic Model Calibration

dc.contributor.authorNickles, Cassandra
dc.contributor.authorBeighley, Edward
dc.contributor.authorFeng, Dongmei
dc.contributor.departmentNortheastern University
dc.contributor.departmentNortheastern University
dc.contributor.departmentUniversity of Massachusetts Amherst
dc.date2023-09-24T07:27:34.000
dc.date.accessioned2024-04-26T08:52:26Z
dc.date.available2021-10-12T00:00:00Z
dc.date.issued2020-01-01
dc.description.abstractThe Surface Water and Ocean Topography (SWOT) satellite mission, expected to launch in 2022, will enable near global river discharge estimation from surface water extents and elevations. However, SWOT’s orbit specifications provide non-uniform space–time sampling. Previous studies have demonstrated that SWOT’s unique spatiotemporal sampling has a minimal impact on derived discharge frequency distributions, baseflow magnitudes, and annual discharge characteristics. In this study, we aim to extend the analysis of SWOT’s added value in the context of hydrologic model calibration. We calibrate a hydrologic model using previously derived synthetic SWOT discharges across 39 gauges in the Ohio River Basin. Three discharge timeseries are used for calibration: daily observations, SWOT temporally sampled, and SWOT temporally sampled including estimated uncertainty. Using 10,000 model iterations to explore predefined parameter ranges, each discharge timeseries results in similar optimal model parameters. We find that the annual mean and peak flow values at each gauge location from the optimal parameter sets derived from each discharge timeseries differ by less than 10% percent on average. Our findings suggest that hydrologic models calibrated using discharges derived from SWOT’s non-uniform space–time sampling are likely to achieve results similar to those based on calibrating with in situ daily observations.
dc.identifier.doihttps://doi.org/10.3390/rs12193241
dc.identifier.urihttps://hdl.handle.net/20.500.14394/5404
dc.relation.ispartofRemote Sensing
dc.relation.urlhttps://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1838&context=cee_faculty_pubs&unstamped=1
dc.rightsUMass Amherst Open Access Policy
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.source.issue19
dc.source.issueRemote Sensing and Modeling of Land Surface Water
dc.source.issue12
dc.source.statuspublished
dc.subjecthydrologic modeling
dc.subjectcalibration
dc.subjectdischarge
dc.subjectSWOT
dc.subjectremote sensing
dc.subjectspatiotemporal sampling
dc.titleThe Applicability of SWOT’s Non-Uniform Space–Time Sampling in Hydrologic Model Calibration
dc.typearticle
dc.typearticle
digcom.contributor.authorNickles, Cassandra
digcom.contributor.authorBeighley, Edward
digcom.contributor.authorFeng, Dongmei
digcom.date.embargo2021-10-12T00:00:00-07:00
digcom.identifiercee_faculty_pubs/839
digcom.identifier.contextkey25383622
digcom.identifier.submissionpathcee_faculty_pubs/839
dspace.entity.typePublication
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