English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/157904
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Fine particle retention within stream storage areas at base flow and in response to a storm event

AutorDrummond, Jennifer D. ; Larsen, Laurel G.; González-Pinzón, Ricardo; Packman, A.; Harvey, Judson W.
Fecha de publicación2017
EditorAmerican Geophysical Union
CitaciónWater Resources Research 53 : 5690-5705 (2017)
ResumenFine particles (1–100 mm), including particulate organic carbon (POC) and fine sediment, influence stream ecological functioning because they may contain or have a high affinity to sorb nitrogen and phosphorus. These particles are immobilized within stream storage areas, especially hyporheic sediments and benthic biofilms. However, fine particles are also known to remobilize under all flow conditions. This combination of downstream transport and transient retention, influenced by stream geomorphology, controls the distribution of residence times over which fine particles influence stream ecosystems. The main objective of this study was to quantify immobilization and remobilization rates of fine particles in a third-order sandand- gravel bed stream (Difficult Run, Virginia, USA) within different geomorphic units of the stream (i.e., pool, lateral cavity, and thalweg). During our field injection experiment, a thunderstorm-driven spate allowed us to observe fine particle dynamics during both base flow and in response to increased flow. Solute and fine particles were measured within stream surface waters, pore waters, sediment cores, and biofilms on cobbles. Measurements were taken at four different subsurface locations with varying geomorphology and at multiple depths. Approximately 68% of injected fine particles were retained during base flow until the onset of the spate. Retention was evident even after the spate, with 15.4% of the fine particles deposited during base flow still retained within benthic biofilms on cobbles and 14.9% within hyporheic sediment after the spate. Thus, through the combination of short-term remobilization and long-term retention, fine particles can serve as sources of carbon and nutrients to downstream ecosystems over a range of time scales.
DescripciónEste artículo contiene 16 páginas, 7 figuras, 1 tabla.
Versión del editorhttp://dx.doi.org/10.1002/ 2016WR020202.
URIhttp://hdl.handle.net/10261/157904
DOI10.1002/ 2016WR020202.
ISSN0043-1397
Aparece en las colecciones: (CEAB) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.