Results 111 to 120 of about 2,467 (253)

Local Scour of Spur Dike in Unsteady Flow

工程科学与技术, 2014
:Water damage phenomenon of spur dike is widespread and influenced by many factors,and the current research results on it is under the condition of constant flow,which can’t be good enough to solve practical problems.Through flume model experiment,under
喻涛, 王平义, 陈里, 李红
doaj  

Influence of outlet keys slope on downstream bed topography in trapezoidal piano key weirs: An experimental investigation

Results in Engineering
Assessing scour depth downstream of piano key weirs (PKWs) is crucial for maintaining their structural integrity. The slope of the outlet keys significantly influences flow velocity and the associated risk of downstream scouring.
Chonoor Abdi Chooplou, Masoud Ghodsian, Mohammad Vaghefi   +2 more
doaj   +1 more source

Contribution of complex pier components on local scour depth [PDF]

, 2014
An experimental campaign of 8 long-duration tests on scouring at complex piers was carried out under steady clear-water flow conditions. The aim was to evaluate the contribution of complex pier components on the total local scour depth.
Maia, R., Castiblanco, M., Cardoso, A. H., Couto, L. T.   +3 more
core  

Plant and soil biodiversity reveals past and potential future states of naturally regenerating and planted native forests

Restoration Ecology, EarlyView.
Abstract Introduction Forest restoration can be achieved by promoting natural regeneration or planting tree seedlings, but the relative benefits of these widely used approaches are questioned. Soil communities may influence restoration outcomes but are usually ignored by monitoring schemes.
Andrew Dopheide, Gwen‐Aelle Grelet, James K. McCarthy, Peter J. Bellingham, Bruce Burns, Carina Davis, Alexander J. Fergus, Duckchul Park, Luitgard Schwendenmann, Robyn Simcock, Mahajabeen Padamsee   +10 more
wiley   +1 more source

Beaver dam analogues increase amphibian breeding occupancy and bat activity

Restoration Ecology, EarlyView.
Abstract Introduction Beavers are ecosystem engineers that can create ponds, increase stream complexity, and enhance biodiversity. To mimic these and other effects, restoration practitioners increasingly install beaver dam analogues (BDAs) in degraded streams.
Julianna Hallza, Michael Dello Russo, Lisa Foster, Alex Harwell, Mark Ingman, Alexa Whipple, Jonah Piovia‐Scott   +6 more
wiley   +1 more source

Hydraulic erosion patterns downstream of corrugated aprons: investigating free and submerged jet effects

Frontiers in Environmental Engineering
The experimental evaluation of the performance of a corrugated apron under free flow subcritical and submerged conditions was conducted, with a focus on scour patterns over the apron. Comparative analysis with a smooth rigid apron revealed an increase in
Mohd Aamir Mumtaz, Mohamed H. Elgamal, Mohamed I. Farouk, Mohamed I. Farouk, Md Irfanul Haque Siddiqui   +4 more
doaj   +1 more source

Disturbance legacies in arid environments shape recovery of former agricultural land

Restoration Ecology, EarlyView.
Abstract Introduction Increasingly, arid agricultural land is being permanently taken out of irrigated production due to more frequent drought, higher temperatures, and the overconsumption of groundwater, with important ramifications for ecological recovery.
Laurel M. Brigham, Nicole M. Fiore, Julie C. Coffey, Sarah Kimball, R. Travis Brooks, Megan E. Lulow   +5 more
wiley   +1 more source

Development of Empirical Formulas for Effect of Circular Pier and Abutment on Local Scour Depth [PDF]

, 2013
    This study based on laboratory experiments for computing depth of local scour around abutment and bridge pier neighboring abutment considering the study of the effects of upstream flow conditions , pier and abutment sizes , median size of bed ...
Abbass, Rasha Oda, Al-Saadi., Saleh I. Khassaf   +1 more
core  

Limited effects of structural restoration on ecosystem functioning in an urban tropical stream

Restoration Ecology, EarlyView.
Abstract Introduction Hydromorphological restoration through structural interventions is commonly used to mitigate urbanization impacts on lotic freshwater systems, but their effects on ecosystem functioning in urban tropical streams remain unexplored.
João Miguel Merces Bega, Björn Gücker, Davi Gasparini Fernandes Cunha   +2 more
wiley   +1 more source

Prediction of scour profiles downstream of grade control structures via the shear stress and sediment bed curvature model

International Journal of Sediment Research
A new semianalytical model for the prediction of local scour profiles downstream from typical grade-control structures is proposed on the basis of the variation in bed shear stress and the sediment bed curvature concept.
Amir H. Azimi
doaj   +1 more source