نتایج جستجو برای: scour hole

تعداد نتایج: 62703  

2016
Luis G. Castillo José M. Carrillo Clelia Marti

Paute-Cardenillo (owned by Celec Ep-Hidropaute) is a dam with maximum height 135 m located in the Paute River in Ecuador. Its hydroelectric production will be integrated at the National Electric System of Ecuador with an installed capacity of 600 MW which will produce 3300 GWh per year. To evaluate the stability and safety of the structure, it is necessary to ascertain the shape and dimensions ...

Journal: :Eng. Appl. of AI 2011
Mahesh Pal N. K. Singh N. K. Tiwari

This paper investigates the potential of support vector machines based regression approach to model the local scour around bridge piers using field data. A dataset of consisting of 232 pier scour measurements taken from BSDMS were used for this analysis. Results obtained by using radial basis function and polynomial kernel based Support vector regressionwere comparedwith four empirical relation...

2006
Brian C. WELCH Robert W. JACOBEL

Ice stratigraphy from deep-penetrating radar data collected during the 2002 US International Trans-Antarctic Scientific Expedition (US-ITASE) traverse shows evidence of a significant erosion surface and drift-filled basin related to a previously undiscovered 1400m subglacial mountain between Hercules Dome (878420 S, 1088W) and South Pole. The 3MHz radar profile crosses three subglacial mountain...

Journal: :تحقیقات آب و خاک ایران 0
سید محمد علی زمردیان دانشیار دانشگاه شیراز مجتبی عقلی دانشجوی کارشناسی ارشد، دانشگاه شیراز

a large number of authors have studied to find out how to control scouring around a pier along direct stream. the objective of this research is then to study a scour pattern around such piers on curves rivers due to the fact that there may be a difference between a flow pattern on a direct line and the meander. thus, this study tries to check whether the use of cable and collar alone and in a c...

Journal: :Sustainable Energy Technologies and Assessments 2023

Foundation scour has long been a concern in the offshore wind industry as it poses great threat to safety of turbines (OWTs). However, current understanding this issue is still insufficient. This because many farm factors and their coupling effect on have not fully investigated. Therefore, two phases experimental studies are conducted paper investigate how monopile vibration, water flow, interm...

2014
M. Alauddin T. Tsujimoto

Dynamicity of stream channels along with environmental concern is the key issue to address in lowland rivers like Jamuna in Bangladesh. The groins are important structures in attaining the improved river environment, but their effective functioning is not evident yet with the present design. Considering the present demands, an approach through modification of groin configurations is planned to ...

Journal: :Sustainability 2022

The depths and areas of the scour holes around spur dikes are most concerning issues regarding dike design. In this study, using a moving bed experiment, influence traditional rock-fill new permeable with different permeabilities on riverbed under unsteady flow was studied, spatial characteristics at heads were analyzed. results show that increases in permeability coefficient dike, depth area h...

Journal: :AL Rafdain Engineering Journal 2023

Erosion is defined as the displacement of bottom materials due to flow energy and moving them farthest distance, which negatively affects stability hydraulic structures. In this research, effect properties screen walls on scour in open channels was studied. Therefore, study included evaluating diameters openings (φ), wall thickness (t), ratio distance from gate height opening below process. A t...

Journal: :Journal of Engineering and Applied Science 2023

Abstract Weirs are hydraulic obstructions constructed across an open-channel flow causing a rise in water which is useful to convert the channels upstream as well using these structures measuring device. There different types, and sharp-crested weir one of them. Local scour downstream most critical problems affecting their safety stability. Many studies conducted prevent facilities from collaps...

Journal: :Journal of Hydrology and Hydromechanics 2021

Abstract The appearance of an ice jam in a river crucially distorts local hydrodynamic conditions including water level, flow velocity, riverbed form and scour processes. Laboratory experiments are used for the first time here to study ice-induced processes near bridge pier. Results show that with sheet cover hole depth around is increased by about 10% compared under equivalent open conditions....

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