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Stream power
About: Stream power is a research topic. Over the lifetime, 1135 publications have been published within this topic receiving 51324 citations.
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TL;DR: The authors quantifies historical changes in flood power (measured by boundary shear stress and unit stream power) and riparian vegetation in a narrow stream canyon, and analyses of historical air and g...
Abstract: This study quantifies historical changes in flood power (measured by boundary shear stress and unit stream power) and riparian vegetation in a narrow stream canyon. Analyses of historical air and g...
10 citations
TL;DR: In this paper, field data are reinterpreted using the Vortex-Drag equation for evaluating the alluvial resistance in a sand bed river and a systematic decrease in the control factor down to a canonical value is found for well-contrasted freshet events.
Abstract: Field data are here re-interpreted using the Vortex–Drag equation for evaluating the alluvial resistance in a sand bed river. The Vortex–Drag equation introduces the Rossiter resonance concept into alluvial hydraulics. It appears that this equation is more consistent than the Manning approach for the lower alluvial regime since a ripple configuration effectively induces a lower flow resistance coefficient than a duned configuration. A systematic decrease in the control factor down to a canonical value during the transition from the lower to the upper alluvial regime is found for well-contrasted freshet events. It results that during high stream power events with maximum river bed reshaping, the flow pattern is reproduced by simply imposing this canonical value. This is most welcome in alluvial hydraulic routing, because peak-discharge events are generally these which are the most difficult to characterize in a straightforward way, both experimentally and numerically.
10 citations
TL;DR: Wang et al. as mentioned in this paper investigated the relationship between Dc of shallow overland flow and hydraulic parameters to establish an accurate model for purple soil, which is defined as an Entisol in the US Soil Taxonomy system.
10 citations
TL;DR: In this paper, the authors examined the spatial diversity of floodplain styles in the lower Panuco basin, a large river system that drains east-central Mexico and empties into the Gulf of Mexico at Tampico, Tamaulipas.
Abstract: Floodplains exhibit a variety of styles because of the dominance of specific fluvial processes. This study examines the spatial diversity of floodplain styles in the lower Panuco basin, a large river system that drains east-central Mexico and empties into the Gulf of Mexico at Tampico, Tamaulipas. Changes in mean stream power (W m-2) and surficial floodplain environments are considered for distinct valley segments. Valley width and channel width increase downstream, although lithologic controls result in the floodplain width being highly variable. Mean stream power decreases from 375 (W m-2) in the Rio Moctezuma valley in the upper portions of the coastal plain, to 14 (W m-2) in the lower reaches of the Rio Panuco. Channel deposits are more significant to floodplain construction in the upper coastal plain. In the lower Moctezuma the valley width abruptly increases and floodplain gradient decreases, which results in a more diverse suite of floodplain deposits. In the lower Panuco valley overbank processes characterize the floodplain, which is manifest as wide natural levees and large backswamp basins.
10 citations
TL;DR: In this paper, an approach for river corridor mapping based on open access data only, in order to foster large-scale analysis of river systems in data-scarce areas is proposed.
Abstract: In fluvial geomorphology as well as in freshwater ecology, rivers are commonly seen as nested hierarchical systems functioning over a range of spatial and temporal scales. Thus, for a comprehensive assessment, information on various scales is required. Over the past decade, remote sensing-based approaches have become increasingly popular in river science to increase the spatial scale of analysis. However, data-scarce areas have been widely ignored so far, even if most remaining free flowing rivers are located in such areas. In this study, we suggest an approach for river corridor mapping based on open access data only, in order to foster large-scale analysis of river systems in data-scarce areas. We take the more than 600 km long Naryn River in Kyrgyzstan as an example, and demonstrate the potential of the SRTM-1 elevation model and Landsat OLI imagery in the automated mapping of various riverscape parameters, like the riparian zone extent, distribution of riparian vegetation, active channel width and confinement, as well as stream power. For each parameter, a rigor validation is performed to evaluate the performance of the applied datasets. The results demonstrate that our approach to riverscape mapping is capable of providing sufficiently accurate results for reach-averaged parameters, and is thus well-suited to large-scale river corridor assessment in data-scarce regions. Rather than an ultimate solution, we see this remote sensing approach as part of a multi-scale analysis framework with more detailed investigation in selected study reaches.
10 citations