Results 51 to 60 of about 2,102 (256)

Experimental and numerical investigation of the effect of different shapes of collars on the reduction of scour around a single bridge pier. [PDF]

PLoS ONE, 2014
The scour phenomenon around bridge piers causes great quantities of damages annually all over the world. Collars are considered as one of the substantial methods for reducing the depth and volume of scour around bridge piers.
Afshin Jahangirzadeh, Hossein Basser, Shatirah Akib, Hojat Karami, Sareh Naji, Shahaboddin Shamshirband   +5 more
doaj   +1 more source

Hydraulic reconstruction of catastrophic drainage from the Late Glacial, Lake Fraser, British Columbia, Canada

Journal of Quaternary Science, EarlyView.
ABSTRACT Glacial Lake Fraser, which formed in British Columbia against the retreating Cordilleran Ice Sheet, stored ~520 km3 of water before its near‐total drainage into the Salish Sea during an outburst flood event. Despite the impact of the outburst flood on sediment transport and landscape evolution in the Fraser River valley, its peak discharge and
Sean M. Loeffler, John J. Clague, Brendan G. N. Miller, Sophie L. Norris   +3 more
wiley   +1 more source

The Effects of Permeable, Impermeable and Bandal-like Spur-dike Angel On Geometric Dimensions of Scouring In Submerged Conditions [PDF]

علوم و مهندسی آبیاری, 2017
The purpose of this study is to compare the scouring hole geometric dimensions for three kinds of spur-dike: permeable, impermeable and bandal-like for submerged conditions by conducting a set of experimental tests.
Fatemeh Jarah Zade, Mahmood kashefipour, Mahmood Shafai Bajestan   +2 more
doaj   +1 more source

A novel approach for in situ benthic habitat characterization

Limnology and Oceanography: Methods, EarlyView.
Abstract Habitat heterogeneity is a key driver of temporal and spatial variability of subtidal marine benthic biodiversity. However, this makes it a challenging environment in which to measure and quantify the factors driving biodiversity in a consistent manner.
Ryan J. W. Mathews, David K. A. Barnes, Simon A. Morley, Gareth Flint, Lloyd S. Peck   +4 more
wiley   +1 more source

Catchment conversion to agriculture alters freshwater macroinvertebrate community responses to flow disturbance: results from a replicated in‐stream experiment

Oikos, EarlyView.
Anthropogenic stressors often co‐occur in ecosystems, but their combined impacts are rarely assessed using field experiments. Press disturbances particularly can reshape community dynamics, altering their capacity to withstand or recover from acute pulse disturbances by modifying response diversity.
Bridget E. White, Anne Watson, Sean T. Atkinson, Belinda J. Robson, Russell G. Death, Mark J. Hovenden, Leon A. Barmuta   +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

Enabling effective urban green space stewardship through planning: A qualitative comparative analysis in Southwest England

People and Nature, EarlyView.
Abstract Amid increasing urbanisation and biodiversity decline, ‘effective stewardship’ of urban green space (UGS) is a complex but critical nature‐based solution for long‐term environmental, social and economic gain. Combining stewardship and sense‐of‐place frameworks with European nature‐based solutions guidance, we investigate which social and ...
Fay Kahane, Melissa Ralph, Rosalind F. Shaw   +2 more
wiley   +1 more source

Scour Depth Around Cylinders Under Combined Effects of River Flow and Tidal Currents

Journal of Marine Science and Engineering
The safety of coastal structures is a growing global concern due to the combined effects of strong tides and river flow. In this study, the local scour around cylinders under the influence of tides combined with river flows was investigated numerically ...
Yuezhang Xia, Jiahao Liu, Shiyu Yang, Shaohua Wang, Li Li   +4 more
doaj   +1 more source

Scaling and Spatial Analysis of Infiltration at the Regional Scale (Case Study: the Shahrekord Watershed) [PDF]

مهندسی منابع آب, 2014
Some Experiments were conducted in water research center, for five specific discharge and four tail water depth to investigate effects of parameters like specific discharge and tail water depth.
gh. a, m.r k, e. s
doaj  

Experimental Investigation of the Effects of Flow Discharge on the Scour Rate around the Groups of Bridge Piers with a Rough Surface in the Presence of Aggregate Extraction Pits

علوم آب و خاک, 2021
The scour around the bridge piers is one of the main causes of bridge failure and the extraction of aggregates may aggravate this phenomenon. The present study comprehensively investigated the scour around the groups of bridge piers in the presence of ...
R. Daneshfaraz, M. Sattariyan Karajabad, B. Alinejad, M. Majedi Asl   +3 more
doaj