scispace - formally typeset
Search or ask a question
Topic

Stream power

About: Stream power is a research topic. Over the lifetime, 1135 publications have been published within this topic receiving 51324 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the response of soil detachment rate by raindrop-affected sediment-laden sheet flow to sediment load and hydraulic parameters was investigated within a detachment-limited sheet erosion system on steep slopes to understand sheet erosion processes and derive an accurate experimental model.
Abstract: The response of soil detachment rate by raindrop-affected sediment-laden sheet flow to sediment load and hydraulic parameters was investigated within a detachment-limited sheet erosion system on steep slopes to understand sheet erosion processes fully and derive an accurate experimental model. An experiment was conducted at slopes of 12.23%, 17.63%, 26.8%, 36.4%, 40.4% and 46.63% under rainfall intensities of 48, 60, 90, 120, 138 and 150 mm h−1, respectively, by using simulated rainfall. Results showed that the soil detachment rate by raindrop-affected sediment-laden sheet flow decreased as the sediment load by sheet flow increased, and the decrease was a power function of sediment load by sheet flow with NSE = 0.58, MSE = 0.0099 and R2 = 0.58. In addition, the soil detachment rate by raindrop-affected sediment-laden sheet flow increased as a linear function of shear stress, stream power and unit stream power. Shear stress and stream power could be used to predict the soil detachment rate by raindrop-affected sediment-laden sheet flow accurately through a linear equation. Stream power (R2 = 0.87, MSE = 0.003 and NSE = 0.87) was a better predictor of soil detachment rate by raindrop-affected sediment-laden sheet flow than shear stress (NSE = 0.83, MSE = 0.004 and R2 = 0.83). However, prediction based on unit stream power (NSE = 0.43, MSE = 0.01 and R2 = 0.43) was poor. These findings can improve our understanding and modelling of sheet erosion processes on steep slopes in the loess region of China.

27 citations

Journal ArticleDOI
TL;DR: In this paper, the authors explored how and to what extent, a phase of relief-rejuvenation modifies the mode of surface erosion in an approximately 63 km2 drainage basin located at the northern border of the Swiss Alps (Luzern area).

27 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used ArcMap to quantify watershed-scale streambank erosion and estimate the benefits of riparian protection in the Eucha-Spavinaw watershed in eastern Oklahoma, where composite streambanks consist of a small cohesive topsoil layer underlain by non-cohesive gravel.
Abstract: Streambank erosion is a pathway for sediment and nutrient loading to streams, but insufficient data exist on the magnitude of this source. Riparian protection can significantly decrease streambank erosion in some locations, but estimates of actual sediment load reductions are limited. The objective of this research was to quantify watershed-scale streambank erosion and estimate the benefits of riparian protection. The research focused on Spavinaw Creek within the Eucha-Spavinaw watershed in eastern Oklahoma, where composite streambanks consist of a small cohesive topsoil layer underlain by non-cohesive gravel. Fine sediment erosion from 2003 to 2013 was derived using aerial photography and processed in ArcMap to quantify eroded area. ArcMap was also utilized in determining the bank retreat rate at various locations in relation to the riparian vegetation buffer width. Box and whisker plots clearly showed that sites with riparian vegetation had on average three times less bank retreat than unprotected banks, statistically significant based on non-parametric t-tests. The total soil mass eroded from 2003 to 2013 was estimated at 7.27 × 107 kg yr.−1, and the average bank retreat was 2.5 m yr.−1. Many current erosion models assume that fluvial erosion is the dominant stream erosion process. Bank retreat was positively correlated with stream discharge and/or stream power, but with considerable variability, suggesting that mass wasting plays an important role in streambank erosion within this watershed. Finally, watershed monitoring programs commonly characterize erosion at only a few sites and may scale results to the entire watershed. Selection of random sites and scaling to the watershed scale greatly underestimated the actual erosion and loading rates. Copyright © 2016 John Wiley & Sons, Ltd.

27 citations

Journal ArticleDOI
01 Aug 2016
TL;DR: In this article, a log-transformed slope-area plot is used to determine changes in concavities and then to identify colluvial, bedrock and alluvial channels along river profiles.
Abstract: . Slope–area analysis and the integral approach have both been widely used in stream profile analysis. The former is better at identifying changes in concavity indices but produces stream power parameters with high uncertainties relative to the integral approach. The latter is much better for calculating channel steepness. Limited work has been done to couple the advantages of the two methods and to remedy such drawbacks. Here we show the merit of the log-transformed slope–area plot to determine changes in concavities and then to identify colluvial, bedrock and alluvial channels along river profiles. Via the integral approach, we obtain bedrock channel concavity and steepness with high precision. In addition, we run bivariant linear regression statistic tests for the two methods to examine and eliminate serially correlated residuals because they may bias both the estimated value and the precision of stream power parameters. We finally suggest that the coupled process, integrating the advantages of both slope–area analysis and the integral approach, can be a more robust and capable method for bedrock river profile analysis.

27 citations

Journal ArticleDOI
TL;DR: In this article, the authors used hydraulically calibrated aerial photography and GIS to calculate cross-sectional and mean stream power on a stretch of the Brazos River in central Texas.
Abstract: Effective management of river environments requires efficient means of gathering data on the rivers, including stream power and other hydraulic attributes. Traditional methods of data collection are spatially limited and can be restrictively expensive. This study utilizes hydraulically‐calibrated aerial photography and GIS to calculate cross‐sectional and mean stream power on a stretch of the Brazos River in central Texas. Field measured water depths are regressed against image brightness values to establish a highly accurate depth to reflectance curve. GIS‐derived water surface slopes are then combined with estimated water depths to map fully two‐dimensional hydraulic processes. This type of image‐based river monitoring provides both an advance in measurement accuracy and in temporal monitoring.

27 citations


Network Information
Related Topics (5)
Surface runoff
45.1K papers, 1.1M citations
87% related
Sediment
48.7K papers, 1.2M citations
82% related
Groundwater
59.3K papers, 1M citations
82% related
Glacial period
27.3K papers, 1.1M citations
81% related
Vegetation
49.2K papers, 1.4M citations
78% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202351
2022103
202154
202067
201952
201847