{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Dunes in the world's big rivers are characterized by low-angle lee-side slopes and a complex shape", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70208905", "url": "https://pubs.usgs.gov/publication/70208905" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70208905 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1038/s41561-019-0511-7", "url": "https://doi.org/10.1038/s41561-019-0511-7" } ], "journal": { "@type": "Periodical", "name": "Nature Geoscience", "volumeNumber": "13", "issueNumber": "2" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Nature Geoscience" } ], "datePublished": "2020", "dateModified": "2020-03-04", "abstract": "Dunes form critical agents of bedload transport in all of the world\u2019s big rivers, and constitute appreciable sources of bed roughness and flow resistance. Dunes also generate stratification that is the most common depositional feature of ancient riverine sediments. However, current models of dune dynamics and stratification are conditioned by bedform geometries observed in small rivers and laboratory experiments. For these dunes, the downstream lee-side is often assumed to be simple in shape and sloping at the angle of repose. Here we show, using a unique compilation of high-resolution bathymetry from a range of large rivers, that dunes are instead characterized predominantly by low-angle lee-side slopes (<10\u00b0), complex lee-side shapes with the steepest portion near the base of the lee-side slope and a height that is often only 10% of the local flow depth. This radically different shape of river dunes demands that such geometries are incorporated into predictions of flow resistance, water levels and flood risk and calls for rethinking of dune scaling relationships when reconstructing palaeoflow depths and a fundamental reappraisal of the character, and origin, of low-angle cross-stratification within interpretations of ancient alluvial sediments.", "description": "7 p.", "publisher": { "@type": "Organization", "name": "Nature Publishing Group" }, "author": [ { "@type": "Person", "name": "Huizinga, Richard J. huizinga@usgs.gov", "givenName": "Richard J.", "familyName": "Huizinga", "email": "huizinga@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-2940-2324", "url": "https://orcid.org/0000-0002-2940-2324" }, "affiliation": [ { "@type": "Organization", "name": "Central Midwest Water Science Center", "url": "https://www.usgs.gov/centers/cm-water" } ] }, { "@type": "Person", "name": "Oberg, Kevin kaoberg@usgs.gov", "givenName": "Kevin", "familyName": "Oberg", "email": "kaoberg@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-7024-3361", "url": "https://orcid.org/0000-0002-7024-3361" }, "affiliation": [ { "@type": "Organization", "name": "Office of Surface Water", "url": "https://www.usgs.gov/mission-areas/water-resources" }, { "@type": "Organization", "name": "WMA - Observing Systems Division", "url": "https://www.usgs.gov/mission-areas/water-resources" } ] }, { "@type": "Person", "name": "Cisneros, Julia", "givenName": "Julia", "familyName": "Cisneros", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-6451-4180", "url": "https://orcid.org/0000-0001-6451-4180" }, "affiliation": [ { "@type": "Organization", "name": "Department of Geology, University of Illinois at Urbana-Champaign" } ] }, { "@type": "Person", "name": "Best, Jim L.", "givenName": "Jim L.", "familyName": "Best" }, { "@type": "Person", "name": "van Dijk, Thaienne", "givenName": "Thaienne", "familyName": "van Dijk", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-1702-1142", "url": "https://orcid.org/0000-0003-1702-1142" }, "affiliation": [ { "@type": "Organization", "name": "Department of Applied Geology and Geophysics, Deltares, Utrecht, the Netherlands" } ] }, { "@type": "Person", "name": "de Almeida, Renato Paes", "givenName": "Renato Paes", "familyName": "de Almeida", "affiliation": [ { "@type": "Organization", "name": "Instituto de Geociencias, Universidade de Sao Paulo, Brazil" } ] }, { "@type": "Person", "name": "Amsler, Mario", "givenName": "Mario", "familyName": "Amsler", "affiliation": [ { "@type": "Organization", "name": "Instituto Nacional de Limnologia, Santa Fe, Argentina" } ] }, { "@type": "Person", "name": "Boldt, Justin A.", "givenName": "Justin A.", "familyName": "Boldt", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-0771-3658", "url": "https://orcid.org/0000-0002-0771-3658" }, "affiliation": [ { "@type": "Organization", "name": "Indiana-Kentucky Water Science Center", "url": "https://www.usgs.govhttps://www.usgs.gov/centers/oki-water" }, { "@type": "Organization", "name": "Ohio-Kentucky-Indiana Water Science Center", "url": "https://www.usgs.govhttps://www.usgs.gov/centers/oki-water" }, { "@type": "Organization", "name": "WMA - 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