Abstract
The geological conditions of the Three Gorges Reservoir Region are complex and changing, and large- and medium-sized landslides are widely distributed. When a high-speed moving landslide enters the water, the water is significantly disturbed, and a landslide-generated wave will be formed, which will spread along the upstream and downstream of the river, causing significant threats and destruction to the hydraulic structures and the navigation of ships. Based on the typical rock landslide parameters and fracture development, we establish a three-dimensional physics experimental model of the bending section of the landslide-generated wave in the Three Gorges Reservoir Region. This paper primarily studies the variation law of the first wave height of landslide-generated waves with the width, height, and water entry velocity of the landslide body and then provides an empirical formula for the first wave height of landslide-generated waves in the curved section of the Three Gorges Reservoir Region. The ship rolling motion equation in the landslide-generated water area is analysed and established systematically. Additionally, the ship manoeuvring motion model in the landslide-generated water area is built. This paper explains the variation characteristics of ship turning tracks at different sailing speeds and sailing positions and proposes a basis to determine the navigation safety of ships in this area, thus providing new theoretical and technical support for the risk assessment of navigation of ships in the reservoir area.
Highlights
With the rapid development of the economy, ships have gradually become large-scale and standardised. e navigational safety of ships has attracted much interest; in particular, the fluctuation of the water level in the ree Gorges Reservoir Region causes the bank slope to become unstable and slide down at high speed, forming a landslide-generated wave, which poses a significant threat to the hydraulic structure in the river course, coastal construction, and navigation safety of ships
Scholars have studied the characteristics of landslideinduced waves using simulation models and model tests
Ersoy et al [2] used a 3D numerical analysis to study the potential generation of impulse waves, using the data of paleo-landslides at the Artvin Dam reservoir
Summary
With the rapid development of the economy, ships have gradually become large-scale and standardised. e navigational safety of ships has attracted much interest; in particular, the fluctuation of the water level in the ree Gorges Reservoir Region causes the bank slope to become unstable and slide down at high speed, forming a landslide-generated wave, which poses a significant threat to the hydraulic structure in the river course, coastal construction, and navigation safety of ships. Ersoy et al [2] used a 3D numerical analysis to study the potential generation of impulse waves, using the data of paleo-landslides at the Artvin Dam reservoir. Karahan et al [4] evaluated the potential landslide area of impulse waves using 3D numerical simulation-based models for the Tersun Dam reservoir. Chillcce and Moctar [9] established a numerical method to simulate ship manoeuvring in waves and solved the six-degree-of-freedom nonlinear equations of the motion described. Carthen et al [13] conceived the modified manoeuvring mathematical group (MMG) model to predict the manoeuvring motions of a ship and defined a generalised prediction method to analyse the flow pattern around the gate rudder. Is paper is based on a physical test to analyse the characteristics of landslide-induced waves and derives the equations of ship motion in an area of a landslide-induced wave. A ship manoeuvring motion model in the landslide-generated water area is built. e model facilitates a rapid forecast of the hazards from landslide-induced waves in reservoirs and provides a reference for modelling other types of physical tests
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