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Catchment Morphometric Characteristics' Impact on Floods Management
Published in Saeid Eslamian, Faezeh Eslamian, Flood Handbook, 2022
Rina Kumari, Vikas Kamal, Saumitra Mukherjee, Saeid Eslamian
Estuaries are inlet areas of the coastline where the coastal tide meets a concentrated seaward flow of fresh water in a river. The interaction between the seaward flow of river water and landward flow of saline water during high tides may cause a build-up of water or inland-moving tidal bore. Frequently, the funnel shape characteristic of many estuaries causes an increase in high water levels in the upper, narrowing reaches of the associated river. These types of floods are mostly experienced in deltaic areas of rivers along the coasts, for example, the Mouths of the Ganges.
Open channel flow
Published in Amithirigala Widhanelage Jayawardena, Fluid Mechanics, Hydraulics, Hydrology and Water Resources for Civil Engineers, 2021
Amithirigala Widhanelage Jayawardena
A moving hydraulic jump, or tidal bore, occurs when a tide travels upstream against the direction of flow of a tidal river or a narrow bay. A moving hydraulic jump can also be formed as a cascade of roll waves or undulating waves moving downstream and overtaking a shallower downstream flow of water. Some conditions necessary for a tidal bore to be formed include a fairly shallow river, a narrow outlet to the sea and a reasonably high tidal range of the order of about 6 m.
Analytical solution for sheet-pile groin vibrations under tidal bore excitation
Published in Marine Georesources & Geotechnology, 2023
Tao Wu, Honglei Sun, Rubén Galindo Aires, Yuanqiang Cai, Juntao Wu, Yunpeng Zhang
A tidal bore is a sudden elevation of the water surface that travels upstream in a river or narrow bay with the incoming rising tide (Nayyer et al. 2019). A tidal bore strongly interacts with hydraulic structures, thus causing considerable damage to structures such as breakwaters and costal buildings in the near-shore region (Donnelly and Chanson 2005; Tolkova and Tanaka 2016; Ramnarayan, Sannasiraj, and Sundar 2020; Mojtahedi et al. 2020). To diminish these issues, groins have been widely built perpendicular to river banks for beach protection and accretion maintenance (Etemad-shahidi and Ghaemi 2011; Ma et al. 2018). However, buckling failures, including head flushing and foot hanging, often occur in traditional groins built from rocks and gravels. To reduce these adverse effects, a new type of sheet-pile groin is proposed, which is depicted in Figure 1. This sheet-pile groin is composed of two rows of reinforced concrete piles and the sheets connected to the pile tops. This type of groin can provide a much longer servicing period with fewer maintenance costs than traditional groins (Cai et al. 2018; Ma et al. 2018).
Dynamic responses of the sheet–pile groin under tidal bore considering the soil–structure–water interaction
Published in Ships and Offshore Structures, 2023
Tao Wu, Rubén Galindo, Honglei Sun, Yuanqiang Cai
A tidal bore is a positive surge in the water surface that travels upstream in a river or narrow bay with large tidal ranges (Zhao et al. 2017; Nayyer et al. 2019). It interacts with vigorous turbulent mixing in the estuarine zone, thus causing significant damage to structures such as breakwaters and coastal buildings in the flow and near–shore regions (Donnelly and Chanson 2005; Yeow et al. 2016; Peng et al. 2019; Pandey et al. 2021). Many infrastructures have been built to protect river embankments and reduce these adverse effects. Groins have been widely built perpendicular to shorelines and river banks for embankment protection and accretion promotion. However, buckling failures, including head flushing and foot hanging, are often found in traditional rock–filled groins (Gisonni and Hager 2008). A novel type of sheet–pile groin is proposed to reduce these deficiencies, as depicted in Figure 1. It comprises two rows of piles and a sheet connecting the pile heads in engineering practice (Xu et al. 2014; Cai et al. 2018). This type of groin can provide a much longer servicing period with fewer maintenance costs than traditional groins (Ma et al. 2018; Wu et al. 2022b).