Topic
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: In this article, the geomorphic effectiveness of floods is evaluated in terms of the distribution of stream power per unit boundary area ( ω ) over time, for three very large floods of the 20th Century in the Indian Peninsula.
37 citations
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TL;DR: The relationship between cataclysmic flood-generated landforms and flood hydraulics was investigated along Box Canyon, an 11 km long bedrock gorge of the lower Big Lost River as discussed by the authors.
37 citations
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TL;DR: In this paper, different hydraulic parameters, including hydraulic shear stress, unit length shear force, steam power, unit steam power and effective stream power, were used to quantify flow detachment.
Abstract: Different hydraulic parameters, including the hydraulic shear stress, unit length shear force, steam power, unit steam power, and effective stream power were used to quantify flow detachment. Most former studies were conducted for flow detachment under uniform slope surface conditions, while a few studies compared different slope surface conditions. The uniform bare loess was prepared in laboratory experiments. Natural fallowed soil loess with stone covers was prepared in field experiments. The objective of this study was to assess the differences in hydraulic parameters and sediment detachment under these different soil surface conditions. Our results show that the unit sediment load (Rs) has a good linear relationship with the unit runoff rate (Rr) for the flume and field experiments, and the relationship can be expressed as the function: Rs = 0.262Rr − 0.802 (R2 = 0.947). The rate of Manning roughness coefficient to mean flow depth (n/h) is a good hydraulic indicator like as the stream power and Reynolds number for predicting the sediment load. Hydraulic parameters n/h, Re, and ω are good indicators for the unit area sediment load for both the flume and field experiments, while Fr, f, and τ are good indicators for the unit area sediment load only when the flume experiments and field experiments are individually analyzed. Among the three good indicators (ω, Re, and n/h), n/h is better than the other two for predicting sediment load in rill erosion for both flume and field experiments, as well as for the unit solute transport rate (MBr). The parameter of n/h probably is not only a good hydraulic parameter as an indicator for both sediment and solute transport, but also a good hydraulic parameter which link with runoff energies. The parameter n/h represents the flow wave of runoff and is an important factor to represent the energy for water and sediment transport, and the flow wave celerity (vw) is related to n/h by: vw = 1.585(n/h)− 0.527 (R2 = 0.978).
37 citations
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01 Aug 2008TL;DR: In this paper, the authors presented a case study for the power potential of a tidal stream connecting a bay to the open ocean and estimated the extractable power, averaged over the tidal cycle, from Masset Sound, located in Haida Gwaii, Canada, is estimated as 79 MW when only the dominant M2 tidal constituent is included in the analysis.
Abstract: This work presents a case study for the power potential of a tidal stream connecting a bay to the open ocean. The extractable power, averaged over the tidal cycle, from Masset Sound, located in Haida Gwaii, Canada, is estimated as 79 MW when only the dominant M2 tidal constituent is included in the analysis. The value increases to 87 MW when the three dominant constituents are included. It is shown that extracting the maximum power from Masset Sound will decrease both the maximum water surface elevation within the bay and the maximum volume flowrate through the channel to approximately 58 per cent of their undisturbed values.
37 citations
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TL;DR: A literature survey on methods of computing stable river-channel geometry, requiring a small amount of work effort and few input data, has been made and is presented in this paper, where the use of empirical regime equations and an extremal hypothesis in conjunction with a sediment-transport and a flow-friction theory has been formulated.
Abstract: A literature survey on methods of computing stable river-channel geometry, demanding a small amount of work effort and few input data, has been made and is presented. Besides the use of empirical regime equations and the use of an extremal hypothesis in conjunction with a sediment-transport and a flow-friction theory, new regression equations have been formulated which are used together with a sedimenttransport equation. These methods may prove efficient when predicting changes, such as after dam and reservoir construction, on an alluvial river. Calculations using the different methods have been exemplified on a natural river.
37 citations