Results 1 to 10 of about 66 (62)

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

Geophys 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, Hiramatsu Y, Scheingross JS, Yamaguchi S, Takahashi K.   +4 more
europepmc   +2 more sources

Hydraulics of free overfall in smooth triangular channels

Ain Shams Engineering Journal, 2021
The present study deals with the hydraulic behavior of smooth triangular channels with free overfall in order to obtain useful relationships for the estimation of end depth discharge (EDD) in terms of brink depth (yb), channel side slopes (m) and channel
Karzan Abdullah Muhsin, Bahzad Mohammad Ali Noori   +1 more
doaj   +3 more sources

Power-law free overfall in subcritical flow regime

Ain Shams Engineering Journal, 2015
Free overfall can be used as a discharge measuring structure by a single measurement of end flow depth. Many theoretical and experimental studies carried out on free overfalls with different cross-section shape, different slope (mild and steep), and ...
Ali R. Vatankhah
doaj   +3 more sources

Numerical modeling of laminar free overfall in triangular channels

Ain Shams Engineering Journal
Design of open channel transport and flow measurement systems for highly viscous liquids requires accurate modelling of laminar free overfall. In this study, a computational fluid dynamics model was developed to investigate subcritical laminar free ...
Primož Drešar, Marko Hočevar, Marko Blagojevič, Benjamin Bizjan   +3 more
doaj   +3 more sources

Using the Brink Depth in Discharge Measurement for Inverted Semicircular Open Channels [PDF]

Journal of Engineering Research - Egypt, 2021
A free overfall at the end of an open channel provides a simple means for measuring flow discharge. The semicircular open channel plays a significant role in various applications, and it is of interest to calculate its discharge.
Reham Zeidan, Mohamed Elshemy, Ibrahim Rashwan   +2 more
doaj   +1 more source

Estimating the scour depth of slope control structures with sharp-crested weir using artificial intelligence models [PDF]

مهندسی منابع آب, 2023
Introduction: In free overfall spillways, waterfalls over the crown of the spillway almost vertically and impacts the downstream bed of the dams. Due to the high velocity and energy of the flow which impacts the erodible downstream bed, it may cause ...
Shahram Mousavi
doaj   +1 more source

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

Earth 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, Paul A. Carling, Hao Wang, Weiming Liu, Yifei Cui, Chaohua Wu, Wen Jin, Nazir Ahmed Bazai   +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

Journal 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, Fabian Walter, Brian McArdell, Duccio Gheri, Emanuele Marchetti   +4 more
wiley   +1 more source

Study the Affecting Factors on Free overfall Flow and Bed Roughness in Semi-Circular Channels by Artificial Neural Network

Tikrit Journal of Engineering Sciences, 2022
One of the significant problems facing the water resource engineer is calculating the coefficient of roughness for subsequent design calculations of the discharge amount of a channel or river. In this study, experiments were conducted in a semi-circular,
Raad Hoobi Irzooki, Ayad Saoud Najem
doaj   +1 more source

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

Hydrological 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, Alisa W. Coffin, Joseph Sheridan, Oliva Pisani, Dinku M. Endale, Tim C. Strickland   +5 more
wiley   +1 more source