Geostatistical merging of rain gauge and radar data for high temporal resolutions and various station density scenarios

dc.contributor.authorBerndt, Christian
dc.contributor.authorRabiei, Ehsan
dc.contributor.authorHaberlandt, Uwe
dc.date.accessioned2024-06-20T13:56:46Z
dc.date.available2024-06-20T13:56:46Z
dc.date.issued2013-10-26
dc.description.abstractThis study investigates the performance of merging radar and rain gauge data for different high temporal resolutions and rain gauge network densities. Three different geostatistical interpolation techniques: Kriging with external drift, indicator kriging with external drift and conditional merging were compared and evaluated by cross validation. Ordinary kriging was considered as the reference method without using radar data. The study area is located in Lower Saxony, Germany, and covers the measuring range of the radar station Hanover. The data used in this study comprise continuous time series from 90 rain gauges and the weather radar that is located near Hanover over the period from 2008 until 2010. Seven different temporal resolutions from 10 min to 6 h and five different rain gauge network density scenarios were investigated regarding the interpolation performance of each method. Additionally, the influence of several temporal and spatial smoothing-techniques on radar data was evaluated and the effect of radar data quality on the interpolation performance was analyzed for each method. It was observed that smoothing of the gridded radar data improves the performance in merging rain gauge and radar data significantly. Conditional merging outperformed kriging with an external drift and indicator kriging with an external drift for all combinations of station density and temporal resolution, whereas kriging with an external drift performed similarly well for low station densities and rather coarse temporal resolutions. The results of indicator kriging with an external drift almost reached those of conditional merging for very high temporal resolutions. Kriging with an external drift appeared to be more sensitive in regard to radar data quality than the other two methods. Even for 10 min temporal resolutions, conditional merging performed better than ordinary kriging without radar information. This illustrates the benefit of merging rain gauge and radar data even for very high temporal resolutions.
dc.identifier.doihttps://doi.org/10.1016/j.jhydrol.2013.10.028
dc.identifier.urihttps://irf.fhnw.ch/handle/11654/46176
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Hydrology
dc.spatialAmsterdam
dc.subjectGeostatistical interpolation techniques
dc.subjectWeather radar
dc.subject.ddc624 - Ingenieurbau und Umwelttechnik
dc.titleGeostatistical merging of rain gauge and radar data for high temporal resolutions and various station density scenarios
dc.type01A - Beitrag in wissenschaftlicher Zeitschrift
dc.volume508
dspace.entity.typePublication
fhnw.InventedHereNo
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.affiliation.hochschuleHochschule für Architektur, Bau und Geomatikde_CH
fhnw.affiliation.institutInstitut Bauingenieurwesende_CH
fhnw.openAccessCategoryClosed
fhnw.pagination88-101
fhnw.publicationStatePublished
relation.isAuthorOfPublicationbf3788f2-b398-4ecd-8fa6-d12af32b9216
relation.isAuthorOfPublication.latestForDiscoverybf3788f2-b398-4ecd-8fa6-d12af32b9216
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