Keller, Carolin und Warmedinger, Leena Julia und Gorzawski, Larissa und Huber, Martin und Lehner, Bernhard und Grill, Günther und Thieme, Michele und Wessel, Birgit und Roth, Achim (2025) The new HydroSHEDS v2.0 database derived from the TanDEM-X DEM. ESA Living Planet Symposium, 2025-06-23 - 2025-06-27, Vienna, Austria.
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Kurzfassung
The increased availability and accuracy of recent remote sensing data accelerates the development of high-quality data products for hydrological modelling. Accurate representation of the Earth's surface, including all water-related features, is crucial for simulating runoff and other hydrological processes. HydroSHEDS v2.0, the second and refined version of the well-established HydroSHEDS dataset, provides global seamless high-resolution hydrographic information. Developed through an international collaboration involving the German Aerospace Center (DLR), McGill University, Confluvio Consulting, and World Wildlife Fund, HydroSHEDS v2.0 builds on the TanDEM-X mission's digital elevation model (DEM) to offer enhanced accuracy and expanded geographic coverage compared to its predecessor. While the first HydroSHEDS version relied on the Shuttle Radar Topography Mission (SRTM) DEM, HydroSHEDS v2.0 benefits from the TanDEM-X DEM, which provides a higher resolution of 0.4 arc-seconds globally and includes regions beyond 60°N latitude, previously uncovered by SRTM. Advanced pre-processing techniques ensure that HydroSHEDS v2.0 preserves the high-resolution details of the TanDEM-X DEM. These techniques include the generation of a global inland water mask and its usage for filling invalid and unreliable DEM areas, delineating global coastlines with manual quality control, and reducing distortions caused by vegetation and urban areas. A sequence of automated hydrological conditioning steps further refines the DEM, incorporating void filling, outlier correction, and algorithms to optimize hydrological consistency. Finally, extensive manual corrections using various ancillary data sources improve river network delineation in areas where high uncertainties exist for DEM-derived products, such as areas with flat terrain or anthropogenically modified landscapes. The resulting hydrologically conditioned DEM has a resolution of 1 arc-seconds and ensures accurate derivation of hydrologic flow connections, forming the basis for core products such as flow direction and flow accumulation maps. In the final HydroSHEDS product, these gridded datasets are complemented by secondary vector-based information on river networks, nested catchment boundaries, and associated hydro-environmental attributes. Together, these products create a standardized, multi-scale database in the same structure and format as the original version and supports applications ranging from local to global scales. HydroSHEDS v2.0 offers a consistent and easy-to-use framework for hydrological and hydro-ecological research. The main release, scheduled to start in 2025 under a free license, will provide researchers and practitioners with a robust tool for diverse applications. A demonstration of the novel data products and the pre-processing workflow be presented for selected test sites.
elib-URL des Eintrags: | https://elib.dlr.de/215006/ | ||||||||||||||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Poster) | ||||||||||||||||||||||||||||||||||||||||
Titel: | The new HydroSHEDS v2.0 database derived from the TanDEM-X DEM | ||||||||||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 24 Juni 2025 | ||||||||||||||||||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||||||||||
Stichwörter: | HydroSHEDS, Hydrology, flow direction, hydrological, modelling | ||||||||||||||||||||||||||||||||||||||||
Veranstaltungstitel: | ESA Living Planet Symposium | ||||||||||||||||||||||||||||||||||||||||
Veranstaltungsort: | Vienna, Austria | ||||||||||||||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 23 Juni 2025 | ||||||||||||||||||||||||||||||||||||||||
Veranstaltungsende: | 27 Juni 2025 | ||||||||||||||||||||||||||||||||||||||||
Veranstalter : | European Space Agency | ||||||||||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - TerraSAR/TanDEM | ||||||||||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Deutsches Fernerkundungsdatenzentrum | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt von: | Keller, Carolin | ||||||||||||||||||||||||||||||||||||||||
Hinterlegt am: | 10 Jul 2025 09:48 | ||||||||||||||||||||||||||||||||||||||||
Letzte Änderung: | 10 Jul 2025 09:48 |
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