Wave attenuation through forests under extreme conditions

Worldwide, communities are facing increasing flood risk, due to more frequent and intense hazards and rising exposure through more people living along coastlines and in flood plains. Nature-based Solutions (NbS), such as mangroves, and riparian forests, offer huge potential for adaptation and risk reduction. The capacity of trees and forests...

Global mapping of seaport operability risk indicators using open-source metocean data

Seaport operability is key to the economic viability of ports. Metocean conditions (e.g., wind, short waves, and infragravity waves) affect this operability when certain thresholds are exceeded. This paper describes a method for the global mapping of seaport operability risk indicators using open-source metocean data. This global-scale...

Mapping the Sandy Beach Evolution Around Seaports at the Scale of the African Continent

In Africa, several new seaport developments are being considered. In sedimentary environments, such port developments can have adverse impacts on the evolution of adjacent coastlines. To learn from past port engineering practice, we created a unique database containing the coastline evolution and characteristics of 130 existing African seaports....

Performance evaluation of wave input reduction techniques for modeling inter-annual sandbar dynamics

In process-based numerical models, reducing the amount of input parameters, known as input reduction (IR), is often required to reduce the computational effort of these models and to enable long-term, ensemble predictions. Currently, a comprehensive performance assessment of IR-methods is lacking, which hampers guidance on selecting suitable...

Identifying ecosystem-based alternatives for the design of a seaports marine infrastructure: The case of tema port expansion in Ghana

Long-term sustainable port development requires accounting for the intrinsic values of ecosystems. However, in practice, ecosystem considerations often only enter the planning and design process of ports when required by an Environmental Impact Assessment. At this late stage, most of the design is already fixed and opportunities to minimize...

Analysing decadal-scale crescentic bar dynamics using satellite imagery: A case study at Anmok beach, South Korea

Understanding long-term sandbar dynamics can be crucial for informed coastal zone management, but is often hampered by data availability. To increase the number of sandbar observations available from bathymetric surveys, this study proposes and evaluates a method to manually extract the sandbar location using freely available satellite imagery...

Towards an ecosystem based port design process: lessons learnt from Tema Port, Ghana

Connecting to the trend of harmonization of port developments with nature, this paper presents a framework for the explicit inclusion of ecosystem based alternatives in the early planning and design stages of seaport developments. The framework aims to shift the focus from offsetting environmental impacts afterwards to avoidance and reduction of...

On the accuracy of automated shoreline detection derived from satellite imagery: A case study of the Sand Motor mega-scale nourishment

Measured trends and variability in shoreline position are used by coastal managers, scientists and engineers to understand and monitor coastal systems. This paper presents a new and generic method for automated shoreline detection from the largely unexplored collection of publicly available satellite imagery. The position of the obtained...

Adding value through stakeholder processes in integrated coastal management and sea port development in data-poor environments

A867<br/>Sustainable port development and integrated coastal management (ICM) require: (i) ecosystem-based or integrated design, (ii) a future orientation, (iii) stakeholder-inclusive processes. Stakeholder-inclusive processes, the focus of this paper, increase the diversity of knowledge and the availability of information, and expand the pool...

Long-term bar dynamics using satellite imagery: A case study at Anmok beach, South Korea

Nearshore sandbar patterns can affect the hydrodynamics and, as a result, the beach morphodynamics in the nearshore zone. Hence, spatial and temporal variability in the sandbars can influence beach accretion and erosion. Understanding the variability of the sandbar system can therefore be crucial for informed coastal zone management. So far, the...

Long term coastline monitoring derived from satellite imagery

Understanding coastal erosion processes at the Korean east coast

On the Generic Utilization of Probabilistic Methods for Quantification of Uncertainty in Process-based Morhpodynamic Model Applications

A variety of uncertainty sources are inherent in process-based morphodynamic modelling applications. There is an increasing demand for the quantification of these uncertainties. This contribution introduces a probabilistic-morphodynamic (PM) modelling framework that enables this quantification. The PM modelling framework provides a systematic...

A comprehensive sediment budget for the Mississippi Barrier Islands

In order to conceive any realistic plan for post-Katrina island restoration, it is necessary to understand the physical processes that move sand along the littoral drift zone off the coast of Mississippi. This littoral zone influences the character of the Mississippi barrier islands as they exist in an ever changing cycle. To help in this...

Some longitudinal handling qualities design guidelines for active control technology transport aircraft

This report contains a summary of the main conclusions and recommendations from extensive work performed by the Flight Mechanics Action Group on Handling Qualities (FM/AGOl) of the Group for Aeronautical Research and Technology in Europe (GARTEUR). The work of this Action Group, which involved cooperation between research institutes of France ...

Determination of low-speed longitudinal manoeuvring criteria for transport aircraft with advanced flight control systems

The application of Active Control Technology concepts and in particular the Relaxed Static Stability principle in certain categories of future transport aircraft will lead to the introduction of primary flight control systems incorporating full-time stability augmentation. For this category of transport aircraft adequate handling quality...

Behaviour of very large aircraft disturbed by windshear and atmospheric turbulence

Studie van de dynamische eigenschappen van grote vliegtuigen in het bijzonder tijdens nadering en landing: beschouwing van de "handling qualities" en de "side step"-manoeuvre

In this study the dynamics of very large aircraft in the landing approach are discussed. The flight dynamics of the DC-8 and Boeing-747 are compared with those of hypothetical very large aircraft. These hypothetical aircraft have landing weights of 1, 2 and 4x10(6) lbs. Aircraft data and stability and control derivatives for these hypothetical...