Suspended Sediment Mineralogy and the Nature of Suspended Sediment Particles in Stormflow of the Southern Piedmont of the USA
| dc.contributor.author | River, M | |
| dc.contributor.author | Richardson, CJ | |
| dc.date.accessioned | 2022-03-01T17:21:24Z | |
| dc.date.available | 2022-03-01T17:21:24Z | |
| dc.date.issued | 2019-01-01 | |
| dc.date.updated | 2022-03-01T17:21:24Z | |
| dc.description.abstract | The majority of annual sediment flux is transported during storm events in many watersheds across the world. Using X-ray diffraction, we analyzed the mineralogy of grab samples of suspended sediment during different stages of storm hydrographs in the Southern Piedmont. Mineralogy of suspended sediment changes drastically from quartz-dominated during the rising limb to clay dominated during the late falling limb/baseflow. Changes in mineralogy can shed insight into turbidity relationships, suspended sediment sources, energy versus supply-limited sediment transport, and other suspended sediment parameters such as anion exchange capacity and trace element chemistry. An unexpected key finding, confirmed by X-ray diffraction and electron microscopy, is that both kaolinite and quartz are primarily transported as discrete crystalline minerals of different size classes in our watersheds; this contrasts with existing scientific literature stating that in most fluvial systems suspended sediment is transported primarily as composite particles composed of a heterogeneous mix of all particle sizes. Our findings also support existing literature that turbidity can be a good proxy for elements such as P, which are preferentially adsorbed onto iron oxide coatings thus in situ turbidity probes have great potential to provide relatively inexpensive estimates of P flux when calibrated for specific watersheds. | |
| dc.identifier.issn | 0043-1397 | |
| dc.identifier.issn | 1944-7973 | |
| dc.identifier.uri | ||
| dc.language | en | |
| dc.publisher | American Geophysical Union (AGU) | |
| dc.relation.ispartof | Water Resources Research | |
| dc.relation.isversionof | 10.1029/2018WR024613 | |
| dc.subject | Science & Technology | |
| dc.subject | Life Sciences & Biomedicine | |
| dc.subject | Physical Sciences | |
| dc.subject | Environmental Sciences | |
| dc.subject | Limnology | |
| dc.subject | Water Resources | |
| dc.subject | Environmental Sciences & Ecology | |
| dc.subject | Marine & Freshwater Biology | |
| dc.subject | TOTAL PHOSPHORUS CONCENTRATIONS | |
| dc.subject | PARTICULATE PHOSPHORUS | |
| dc.subject | TURBIDITY MEASUREMENTS | |
| dc.subject | SURROGATE MEASURES | |
| dc.subject | SIZE DISTRIBUTION | |
| dc.subject | LIGHT-SCATTERING | |
| dc.subject | NORTH-CAROLINA | |
| dc.subject | CLAY-MINERALS | |
| dc.subject | TRANSPORT | |
| dc.subject | WATER | |
| dc.title | Suspended Sediment Mineralogy and the Nature of Suspended Sediment Particles in Stormflow of the Southern Piedmont of the USA | |
| dc.type | Journal article | |
| pubs.begin-page | 5665 | |
| pubs.end-page | 5678 | |
| pubs.issue | 7 | |
| pubs.organisational-group | Duke | |
| pubs.organisational-group | Nicholas School of the Environment | |
| pubs.organisational-group | Environmental Sciences and Policy | |
| pubs.organisational-group | Institutes and Provost's Academic Units | |
| pubs.organisational-group | Initiatives | |
| pubs.organisational-group | Duke Innovation & Entrepreneurship | |
| pubs.publication-status | Published | |
| pubs.volume | 55 |
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