Search

Your search keyword '"Leila Hassanabadi"' showing total 7 results
Start Over Author "Leila Hassanabadi"
7 results on '"Leila Hassanabadi"'

1. River bank protection from ship-induced waves and river flow

Author

Sahameddin Mahmoudi Kurdistani, Giuseppe R. Tomasicchio, Felice D'Alessandro, and Leila Hassanabadi

Subjects
River, lake, and water-supply engineering (General), TC401-506
Abstract

A new equation is proposed for the design of armor units on protected river banks under the combined action of ship-induced waves and river flow. Existing observed field and experimental data in the literature have been examined and a valuable database has been developed. Different conditions, including the river water depth, flow velocity, river bank slope, Froude number, wave height, wave period, and wave obliquity have been considered. Results from an empirical equation (Bhowmik, 1978) that only considers the maximum wave height and river bank slope have been compared with the results calculated by the newly developed equation. Calculated results have also been verified against field data. Results show that not only the maximum wave height and river bank slope but also the water depth, flow velocity, wave length, wave obliquity, and wave period are important parameters for predicting the mean diameter of the armor units, highlighting the multivariate behavior of protecting the river bank in the presence of ship-induced waves and river flow velocity. Keywords: River bank protection, Hydraulics, Ship-induced waves, River flow velocity, Wave period, Wave obliquity, Multivariate phenomenon

Published
2019
Full Text
View/download PDF

2. Simple Wave Breaking Depth Index Formula for Regular Waves

Author

Giuseppe Roberto Tomasicchio, Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Felice D'Alessandro, Tomasicchio, Giuseppe, MAHMOUDI KURDISTANI, Sahameddin, D'Alessandro, Felice, and Hassanabadi, Leila

Subjects
Index (economics), Simple (abstract algebra), Mathematical analysis, Breaking wave, Ocean Engineering, Regular wave, Circuit breaker, wave, breaking depth index, hydraulics, hydrodynamic, Water Science and Technology, Civil and Structural Engineering, Mathematics
Abstract

A simple formula to determine the wave breaking depth index for regular waves is proposed. In the literature, there are several formulas for determining the breaker depth index, which, over...

Published
2020

3. Log-Frame Deflectors Scour Morphology in Curved Channels

Author

Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Michele Palermo, Stefano Pagliara, MAHMOUDI KURDISTANI, Sahameddin, Palermo, Michele, Pagliara, Stefano, and Hassanabadi, Leila

Subjects
Physics, scour, meandering channels, Morphology (linguistics), hydraulic structures, log-frame deflectors, morphology, scour, stream restoration, meandering channels, log-frame deflectors, morphology, Frame (networking), hydraulic structures, Geometry, stream restoration
Published
2019

4. Scour Characteristics Downstream of In-Stream River Restoration Structures: Log and J-Hook Vanes Comparison

Author

Stefano Pagliara, Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Kuratorium für Forschung im Küsteningenieurwesen (KFKI), Stefano Pagliara, Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Pagliara, Stefano, MAHMOUDI KURDISTANI, Sahameddin, and Hassanabadi, Leila

Subjects
Ingenieurwissenschaften (620), Log-Vane, J-Hook, Hydraulic Structures, River Restoration, River Grade-Control, Scour
Abstract

River and stream restoration structure’s design features have been an active field of research for hydraulic engineers. Generally, these low-environmental impact structures minimize the impact on natural contexts in needless of frequent human interventions during the operation and are used for riverbank protection, river grade controlling and improving the aquatic habitat. The main objective of this paper aims to compare scour downstream of two different low-head control structures; Log-Vane and Hook vane. The analysis contains the results of laboratory experiments conducted at the PITLAB hydraulic laboratory of University of Pisa and a detailed comparison of scour hole characteristics, highlighting similitude and differences in the respective ranges of application. All tests have been done in clear water conditions using uniform sand as channel bed material.

Published
2014

5. Clear Water Scour Downstream of Log Deflectors in Horizontal Channels

Author

Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Stefano Pagliara, Pagliara, Stefano, Hassanabadi, Leila, and MAHMOUDI KURDISTANI, Sahameddin

Subjects
Hydraulic structures, Engineering, Stream deflectors, Flow (psychology), Tailwater, symbols.namesake, Hydraulic head, Froude number, Geotechnical engineering, Scour, River restoration, Water Science and Technology, Civil and Structural Engineering, In-stream structures, business.industry, Stream deflectors, Log deflectors, Hydraulic structures, River restoration, In-stream structures, Scour, Flow channel, Mechanics, Agricultural and Biological Sciences (miscellaneous), Open-channel flow, Hydraulic structure, Log deflectors, symbols, business, Communication channel
Abstract

Stream deflectors are in-stream hydraulic structures that limit the flow channel width, thereby accelerating the flow through the constricted section. Single-wing and double-wing log deflectors are the two most commonly used types of in-stream eco-friendly structures. The purpose of this paper is to investigate the scour phenomena downstream of log deflectors in straight horizontal channels. The main goal is to obtain design equations to predict the main scour parameters and describe the scour morphology. All the experiments have been carried out in a horizontal channel and in clear water conditions. Log deflectors with different heights and angles were tested. Different hydraulic conditions including densimetric Froude numbers, water head drops, and tailwater values were studied. Results show that the tailwater depth and deflector angle are important variables to determine the scour parameters. Dimensional analysis leads to design equations to estimate the maximum scour depth, maximum length of the scour, and maximum height and length of the dune. Two types of scour morphology downstream of log deflectors have been defined.

Published
2015

6. Erosive and hydrodynamic processes downstream of low-head control structures

Author

Stefano Pagliara, Michele Palermo, Sahameddin Mahmoudi Kurdistani, Leila Hassanabadi, Pagliara, Stefano, Palermo, Michele, MAHMOUDI KURDISTANI, Sahameddin, and Sagvand Hassanabadi, Leila

Subjects
Engineering, energy dissipation, River restoration, business.industry, block ramps, cross-vane weirs, energy dissipation, flow structure, rock grade control structures, scour depth, cross-vane weirs, Flow (psychology), Dissipation, block ramps, cross-vane weirs, energy dissipation, flow structure, rock grade control structures, scour depth, block ramps, flow structure, Downstream (manufacturing), rock grade control structures, Dissipative system, scour depth, Head (vessel), Geotechnical engineering, Gabion, business, Sediment transport, Water Science and Technology
Abstract

Low-environment impact structures have the advantage to conjugate both hydraulic functioning and environmental care. In particular, these structure typologies are widely used for river restoration both to control sediment transport and to dissipate flow energy. In the present paper, rock grade control structures, stepped gabion weirs, block ramps, and cross-vane weirs are analyzed and compared. Both similitudes and differences in terms of scour characteristics and dissipative efficiency are highlighted. The comparison shows that block ramps are the most efficient structures among those tested. Useful practical relationships are proposed in order to estimate both scour characteristics downstream of each structures and energy dissipation.

Published
2015

Catalog

Books, media, physical & digital resources
See catalog results