Results 11 to 20 of about 1,336 (145)

Controls on Erosion and Cyclic Step-Formation Upstream of Waterfalls. [PDF]

open access: yesGeophys Res Lett
Abstract Waterfall retreat transmits base‐level perturbations upstream, thereby providing markers of changing climate and tectonics. In homogeneous rock, waterfalls often retreat either by direct waterfall‐face erosion or incision from repeating (‘cyclic’) steps formed above waterfalls.
Inoue T   +4 more
europepmc   +2 more sources

The morphology and stratification of giant eddy bars reflect the variation in shape of palaeoflood hydrographs: A flume study

open access: yesEarth Surface Processes and Landforms, Volume 48, Issue 2, Page 332-349, February 2023., 2023
Different shaped catastrophic palaeoflood hydrographs result in different giant flood bar morphologies and stratification styles. Distinctive morphologies and stratigraphic motifs are associated with, and discriminate, surge wave floods from protracted recessions and prolonged discharges.
Dingzhu Liu   +7 more
wiley   +1 more source

Infrasonic and Seismic Analysis of Debris‐Flow Events at Illgraben (Switzerland): Relating Signal Features to Flow Parameters and to the Seismo‐Acoustic Source Mechanism

open access: yesJournal of Geophysical Research: Earth Surface, Volume 127, Issue 6, June 2022., 2022
Abstract Debris flows are among the most dangerous phenomena in mountain environment. Recently the use of seismic and infrasonic recordings has proven to be a powerful tool for studying and monitoring debris flows. However, open questions remain about how signal characteristics refllect flow parameters and fluid dynamic processes.
Giacomo Belli   +4 more
wiley   +1 more source

Little River Experimental Watershed, a keystone in understanding of coastal plain watersheds

open access: yesHydrological Processes, Volume 35, Issue 8, August 2021., 2021
Long‐term (52 years) of streamflow data are currently available for nine flow measurement sites in the US EPA Level III Southeastern Plains ecoregion. Hydrologic comparisons across several regional watersheds indicated few differences. Differences found for a smaller nested watershed indicate significant changes in crop and forest coverage can alter ...
David D. Bosch   +5 more
wiley   +1 more source

Performance Assessment of Shockwaves of Chute Spillways in Large Dams

open access: yesShock and Vibration, Volume 2021, Issue 1, 2021., 2021
Spillways are the most important structures of large dams that are responsible for releasing the excessive flood discharge from the reservoir. Although many studies have been performed to determine the flow characteristics over these structures, however, the available information on the shockwaves’ characteristics for spillways’ design is limited.
S. M. Mousavimehr   +3 more
wiley   +1 more source

Discrete Element Simulation Analysis of the Bending and Toppling Failure Mechanisms of High Rock Slopes

open access: yesGeofluids, Volume 2021, Issue 1, 2021., 2021
The high rock slope situated in the Southwest stope of Taiping Mining, Inner Mongolia, is subject to dumping failure due to its instability. The dumping body rock layer of this stope shows obvious bending and lowering of the head. The overturning angle of the rock strata can reach 46°, and tension dislocation along the rock joint can be observed in ...
Zhigang Meng   +7 more
wiley   +1 more source

Supercritical Flow at an Abrupt Drop: Flow Patterns and Aeration [PDF]

open access: yes, 1998
Stepped waterways and cascades are common features of storm waterways, at dam outlets and in water treatment plants. At an abrupt drop, open channel flows are characterised by the presence of shock waves and a substantial flow aeration.
Chanson, Hubert, Toombes, Luke
core   +1 more source

The Free Overfall in Circular Sections with Different Flat Base in Supercritical and Subcritical Flow Regimes

open access: yesمجله آب و خاک, 2017
Introduction: A free overfall offers a simple device for flow discharge measuring by a single measurement of depth at the end of the channel yb which is known as the end depth or brink depth.
A.R. Vatankhah, S. Kiani, S. Riahi
doaj   +1 more source

Turbulent diffusion modelling of sediment in turbidity currents: An experimental validation of the Rouse approach

open access: yesThe Depositional Record, Volume 6, Issue 1, Page 203-216, February 2020., 2020
An increasing number of studies uses simplified modelling of turbidity currents to reconstruct historic and ancient sediment fluxes to the deep sea. The commonly used Rouse model is validated here with experimental data. The results indicate that the Rouse model is accurate for the distribution and throughput of sand along the channel thalweg, but ...
Joris T. Eggenhuisen   +4 more
wiley   +1 more source

Depth-averaged specific energy in open-channel flow and analytical solution for critical irrotational flow over weirs [PDF]

open access: yes, 2013
Free surface flow in open-channel transitions is characterized by distributions of velocity and pressure that deviate from uniform and hydrostatic conditions, respectively.
Castro-Orgaz, Oscar, Chanson, Hubert
core   +2 more sources

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