Riffle-pool maintenance and flow convergence routing observed on a large gravel-bed river

Sawyer, April M.; Pasternack, G. B.; Moir, H. J.; Fulton, Aaron A.

doi:10.1016/j.geomorph.2009.06.021

Cited by 109 publications

(93 citation statements)

References 66 publications

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“…Studies on real RP couplets have shown a great disparity in the discharge that flow 591 convergence routing occurs, ranging from below bankfull (MIlan et al, 2001) to well 592 above bankfull (Sawyer et al, 2010). Managed, altered, and regulated rivers often need 593 to be shifted to entirely new flow regimes.…”

Section: Using Gcss For Process Based River Design 530mentioning

confidence: 99%

“…It is important to note that a velocity reversal or convergence may not be 76 needed to occur for pool maintenance if sediment is not routed into pools (Milan et al,77 2013) or if the bed-material grain size is sufficiently different between riffles and pools 78 (Milne, 1982;Jackson et al, 2015). Flow convergence is important to include in river 79 restoration designs, because it has been linked to the maintenance of undular bed relief 80 in gravel bed rivers despite large floods (White et al, 2010;Sawyer et al, 2010). 81…”

Section: Introduction 44mentioning

confidence: 99%

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The Topographic Design of River Channels for Form-Process Linkages

Brown

Pasternack

Lin

2015

Environmental Management

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Section: Using Gcss For Process Based River Design 530mentioning

confidence: 99%

Section: Introduction 44mentioning

confidence: 99%

The Topographic Design of River Channels for Form-Process Linkages

Brown

Pasternack

Lin

2015

Environmental Management

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“…The channel morphology determines the flow dynamics [3,28] and vice versa. It is expected that the channel morphology can be derived from the observed flow dynamics [1] mainly using the velocity field and stream power identifications.…”

Section: Applicability Of Uas Data In Fluvial Geomorphologymentioning

confidence: 99%

“…Montane streams with elevated dynamics of hydrological and geomorphological processes are a typical and frequent subject of research in hydrological sciences and in fluvial geomorphology [3,4]. The specific conditions of their environment, ranging from climatic conditions, hydrological regime and dynamics, as well as of the dynamics of fluvial and recent geomorphological processes make them frequent subjects of research.…”

Section: Introductionmentioning

confidence: 99%

Multitemporal Monitoring of the Morphodynamics of a Mid-Mountain Stream Using UAS Photogrammetry

Miřijovský

Langhammer

2015

Remote Sensing

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This paper explores the potential of Unmanned Aerial Systems (UASs) for the analysis of variations in the fluvial dynamics of a mid-mountain stream. The UAS photogrammetry was employed to acquire a multitemporal set of high-precision digital terrain models (DTMs) and orthoimages, thereby enabling the reconstruction of variations in riverbed and quantitative analysis of volumetric changes. A hexacopter UAS platform was used for the repeated acquisition of data for the photogrammetric analysis of a stretch of mid-mountain streams with elevated fluvial dynamics. Photogrammetric reconstruction enabled the development of accurate DTMs and orthoimages with spatial resolutions of 2 cm per pixel. These were identified and used to quantitatively assess the segments of channels with active lateral erosion. The UAS-derived data facilitated an analysis of the shifts of stream banks and the calculation of the areal extent of changes and volumetric extent of bank erosion. Comparison of UAS-derived point clouds with aerial LiDAR scanning data demonstrated the high spatial accuracy and precision of the UAS data. The accuracy and high operability of the imaging provide spatial data of a new qualitative level and the potential for the detailed analysis of experimental areas where spatial information is of limited availability. OPEN ACCESSRemote Sens. 2015, 7 8587

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“…También pueden definirse como tramos del río que presentan elevaciones topográficas con lecho de material grueso (Sawyer et al, 2010). Kushner (2008) manifiesta que "en términos ecológicos, los rápidos son esenciales para la producción de invertebrados acuáticos y todo el ciclo de vida de los peces residentes, proporcionando áreas para desove, incubación de huevos, alimentación y refugio.…”

Section: Método Hidráulico R2crossunclassified

Consideraciones para la aplicación del método hidráulico R2CROSS para estimar caudales ecológicos en Colombia

Vélez

2016

Intropica

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RESUMENColombia es un país privilegiado en cuanto a la oferta hídrica, sin embargo, la mayor parte de ésta se encuentra en zonas poco pobladas y la fracción de agua superficial, disponible para las áreas de mayor concentración poblacional, se ve afectada por la sobreexplotación y la contaminación de los ríos. Por esta razón, se sugiere la estimación del caudal ecológico como un instrumento para el manejo de las cuencas del país. Dentro de este trabajo de revisión bibliográfica se presentan los principales conceptos asociados al caudal ecológico, las diferentes metodologías utilizadas para su estimación y se analizan los antecedentes en Colombia. Posteriormente, se hace énfasis en el método hidráulico R2CROSS, se mencionan sus bases teóricas y se muestra el caso de estudio de los ríos Assabet y Charles en Massachusetts (Estado Unidos). A partir de allí, se hizo un comparativo con las condiciones locales para definir las ventajas y desventajas de la aplicación de este método en Colombia. Algunas de las ventajas identificadas fueron la relación costo-beneficio, el poco tiempo requerido para su aplicación, la obtención de resultados similares a los de métodos más complejos como el de la Instream Flow Incremental Methodology (IFIM) y la conveniencia para usarlo en lugares con información hidrológica incompleta. Por otro lado, dentro de sus desventajas se encuentra un mayor costo que los métodos hidrológicos, los sesgos derivados de suponer que a partir de los parámetros hidráulicos se pueden determinar las condiciones óptimas para todas las especies del ecosistema acuático y rivereño y, finalmente, su precisión que depende de una correcta elección de la sección del río. PALABRAS CLAVE:Caudal ecológico, método hidráulico, R2CROSS, HEC-RAS, Colombia. ABSTRACTDespite Colombia is a privileged country in terms of water supply, most of such supply is located in sparsely-populated areas; the surface water fraction, available for higher populated areas, is affected by both overexploitation and pollution of rivers. Therefore, an estimation of environmental flow is suggested, as a means of managing the country's river basins. First, this literature review paper presents the main concepts associated with environmental flow and the several methods used for its estimation, as well as a background analysis in Colombia. Subsequently, it highlights the R2CROSS hydraulic method, including its theoretical bases, and it shows the study case of Assabet and Charles rivers in Massachusetts (United States). From that point, a comparative against local conditions was performed, in order to define the advantages and disadvantages of applying said method in Colombia. Some of the advantages found were the cost-benefit ratio, the little time required for its application, the obtaining of similar results to those gotten by more complex methods such as Instream Flow Incremental Methodology (IFIM), and the convenience to use it in places with incomplete hydrological information. On the other hand, some of the disadvantages found were a higher cost...

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Riffle-pool maintenance and flow convergence routing observed on a large gravel-bed river

Cited by 109 publications

References 66 publications

The Topographic Design of River Channels for Form-Process Linkages

The Topographic Design of River Channels for Form-Process Linkages

Multitemporal Monitoring of the Morphodynamics of a Mid-Mountain Stream Using UAS Photogrammetry

Consideraciones para la aplicación del método hidráulico R2CROSS para estimar caudales ecológicos en Colombia

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