A consistently-scaled frequency domain nonlinear mild-slope equation model for surface wave propagation

As surface waves propagate from deep water toward shallow coastal areas, their ensuing transformation is due to the influence of bathymetry and several important phenomena, such as refraction, shoaling ,and nonlinear effects. Nonlinear wave models based on the classical Boussinesq equation(Peregrine, 1967)have evidenced good performance in...

Assessment of wave overtopping based on numerical modelling and historic events for an early warning system

Low-lying coastal areas can be very vulnerable to extreme storms inducing overtopping and flood events with severe socioeconomic consequences. Also, the associated risk is expected to increase due to sea level rise and coastal population growth. Under this threat, early warning systems (EWS) are a crucial tool for coastal planning and management...

Proposal and verification of rip current detection using AI

There are from 2,000 to 3,000 rescues including those of unconscious people every year on the beaches of Japan, as shown in Fig. 1. The occurrence of drowning accidents is mainly caused by the rip current (Ishikawa et al., 2014), it accounts for 48 % of drowning accidents, as shown in Fig. 2. Also, in Australia, the United States and the United...

Risk Assessment of Low Level Radioactive Waste In Near Surface Disposal Facilities

In this paper, a radiological model for the risk assessment is developed for the near surface disposal facilities of Cesium, Strontium and Cobalt. In addition to the time-dependent annual release rate and dose rate of the radionuclides, the risk to the critical individual is also estimated. The results show that the highest value of annual dose...

Flood Safety on Dikes with Wind Turbines

Many governments want to realize wind power, because it is a technology that promotes sustainable energy. That is why there is need for locations for wind farms (groups of wind turbines). Dikes are good locations for wind farms, because of favourable wind conditions, the absence of cultivation and the presence of road infrastructure. However,...

Uncertainty Analysis and Risk Management of Underground Cavern Group at Jinping II Hydropower Station

The epistemic uncertainty and aleatory uncertainty caused by the geology condition and construction method make the surrounding rock stability evaluation of underground cavern group difficult. The first may be reduced with more field investigation, tests or monitoring, but the later can not be avoided completely. So the risk analysis method can...

Risk Management based Ground deformation monitoring during Queens Bored Tunnels project

Ground, building and utility deformation monitoring is a well-accepted and required practice for underground construction works in urban environments. The availability of real-time monitoring data during construction allows stakeholders to stay ahead of potential problems, to make decisions prior to damage occurrence, and ultimately to reduce...

A Framework for Risk Assessment of Groundwater Drawdown Induced Subsidence

Sub-surface constructions generally involve drainage of groundwater, which can induce land subsidence in compressible soil deposits and cause extensive damage costs in urban areas. A probabilistic framework, in accordance with the risk management framework outlined by the International Standard Organization (ISO), for assessing risks of...

Assessment of Risks of Regional Shallow Slope Failures

Shallow slope failures are one of the most frequent geological hazards in mountainous areas, which pose great danger to people and properties in affected areas. This paper presents a cell-based platform for quantitative risk assessment for shallow slope failures at a regional scale. There are five components in this platform; namely, a digital...

Granular Contact Dynamics for the Probabilistic Stability Analysis of Slopes

Slope instability and landslides can be catastrophic events often leading to loss of life and property. To assess the risks of slope failures, it is often desired that the dynamic process of slope failure can be simulated. This paper proposes a Granular Contact Dynamics (GCD) approach based on variational principles and implicit time integration...

Geotechnical Risk Management for Museum “Our Lord in the Attic” Amsterdam

The paper describes the geotechnical design and execution challenges in underground construction in the historical center of Amsterdam. The geotechnical design and risk management approach of the total works will be presented in detail, with special attention to the specific geotechnical conditions in Amsterdam and the GeoRM risk document. The...

Tracing risk paths in international construction projects: A case study

International construction projects are mostly known with poor cost performance. Their large sizes, multi-party environments, along with unfamiliarity of foreign firms with host country conditions create high chances of cost overrun and delay which lead to disagreements, claims and failures. Factors that result in cost overrun usually occur in...