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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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04 Mar 1964
TL;DR: In this article, it was shown that a river can adjust its profile, velocities, depths, and widths to accommodate the downstream increase in discharge, and that the adjustment is toward minimum variance among the components of stream power.
Abstract: Hydraulic principles, as developed in firm boundary channels, appear insufficient to explain the form and profile of river channels. In nature, stream channels attain a most probable state that must fulfill the necessary hydraulic laws, but in addition, fulfills its degrees of freedom by tendency to equal distribution among velocity, depth, width, and slope. This principle is tested by the use of three examples. Another example explores the accommodation of a river channel to changing discharge. The last example is that of a river free to adjust its profile, velocities, depths, and widths to accommodate the downstream increase in discharge. Each of these examples appears to satisfy the postulate of this paper. The adjustment is toward minimum variance among the components of stream power.

6 citations

Journal ArticleDOI
TL;DR: Wu et al. as discussed by the authors investigated the response of the interrill erosion rate of the soil in this area (Shenmu soil) to flow intensity parameters, considering five slope gradients (0.1564, 0.2079,0.309, and 0.3584) and five rainfall intensities (60, 80, 100, 120 and 140mm·h−1).

6 citations

Journal Article
TL;DR: In this paper, the best flow erosivity indicator(s) for predicting soil detachment rate at low slopes were found for 12 experiments including 6 flow discharges (75, 100, 125, 150, 175 and 200 ml/s) and 2 slope gradients (1.5 and 2%).
Abstract: Soil detachment is known as an important process in soil erosion and its quantification is necessary to establish a basic understanding of erosion. This study was carried out to find the best flow erosivity indicator(s) for predicting detachment rate at low slopes. For this purpose, 12 experiments including 6 flow discharges (75, 100, 125, 150, 175 and 200 ml/s) and 2 slope gradients (1.5 and 2%) were performed. Accordingly, different stream powers less than 0.175 W m-2 were simulated. Soil detachment rate was related to flow depth, flow velocity, unit flow discharge, shear stress, unit stream power and stream power as erosivity indicators. The results showed that the relationship was more significant at slope 2% (R2>0.94) than slope 1.5% (R2>0.84). Among different indicators, flow velocity and unit stream power exhibited unlinear relationships as exponential, while the others showed linear ones. Considering flow depth, unit flow discharge and unit stream power a range of critical values were obtained at different slopes. It was found that for shallow surface flows, measurement of flow depth is difficult while, unit flow discharge can be measured, accurately. Finally, the finding of this research reveals that stream power is the best indicator for predicting soil detachment rate. [Sirjani and Mahmoodabadi. Study On Flow Erosivity Indicators for Predicting Soil Detachment Rate at Low Slopes. International Journal of Agricultural Science, Research and Technology, 2012; 2(2):55-61].

6 citations

Journal Article
TL;DR: In this paper, a long-term field study was conducted in the Upper Jordan channel to evaluate the geomorphic impact and persistence of a 1:100 year catastrophic flood, and to analyse the relationship between the river's hydrological regime and boulder transport behavior.
Abstract: Because direct measurement of boulder transport in natural rivers is difficult, there are very few field studies on the subject Long-term field studies 1969-1999, were conducted in the Upper Jordan channel to evaluate the geomorphic impact and persistence of a 1:100 year catastrophic flood, and to analyse the relationship between the river's hydrological regime and boulder transport behaviour A channel reach of 210 m length and 25-35 m width, with 260 boulders larger than 500 mm b-axis, was resurveyed periodically over 30 years Detailed field surveys, photographs, and painted rocks were used to assess the bed load transport During the study period, four major flood events had the ability to transport boulders of sizes from D 50 1000 mm up to the largest, namely 1700 mm b-axis size Stream power values increase where the depth-slope product is maximized In the wide sections of the channel with lower slope values, the deposition of big boulders determines the formation of bar structures The catastrophic flood has a decisive effect on the modification of the fluvial landform, being a geomorphologically effective event

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202351
2022103
202154
202067
201952
201847