scholarly journals Sediment dynamics in tidally dominated environments controlled by transport and turbulence: A case study for the East Frisian Wadden Sea

Author(s):  
E. V. Stanev ◽  
G. Brink-Spalink ◽  
J.-O. Wolff
Keyword(s):  

Climate Law ◽  
2011 ◽  
Vol 2 (2) ◽  
pp. 219-250 ◽  
Author(s):  
Stefania Munaretto ◽  
Judith E. M. Klostermann

In this study we assess the adaptive capacity of relevant institutions for ecosystems and environmental management in two complex systems: the Dutch Wadden Sea and the Venice Lagoon. A new tool called the Adaptive Capacity Wheel (ACW) is used to diagnose strengths and weaknesses in the institutional systems in these two areas. An overview of both strengths and weaknesses leads to a better understanding of the system of governance and enhances the discussion of how it can be improved. The ACW identifies six dimensions that are relevant for the adaptive capacity of a society, according to the literature on climate adaptation and governance. They are variety, learning capacity, room for autonomous change, leadership, availability of resources, and fair governance. Then, we compare the two cases drawing attention to the physical and institutional similarities and differences that could explain the level of adaptive capacity we found. In this study, the physical and economic characteristics of the two regions proved to be quite similar, while the institutional system was very different. These two different governance systems, however, lead to a similarly low level of adaptive capacity. In theWadden, decision processes are slowed down because of a lack of authority and leadership. On the dimension of learning, the Wadden case scores positively. In Venice, lack of cooperation and accountability limit learning. Venice scores well on the autonomous ability to change. We conclude that in both cases there is a lot to be improved and that the two regions can learn from each other. Venice could, for example, improve learning with structures similar to those in theWadden, such as theWadden Academy. TheWadden area could learn from Venice about how to inform the larger public on potential flooding.





2010 ◽  
Vol 36 (2) ◽  
pp. 145-153 ◽  
Author(s):  
B. van Leeuwen ◽  
D.C.M. Augustijn ◽  
B.K. van Wesenbeeck ◽  
S.J.M.H. Hulscher ◽  
M.B. de Vries


2021 ◽  
Author(s):  
Christopher H. Lashley ◽  
Sebastiaan N. Jonkman ◽  
Jentsje Van der Meer ◽  
Jeremy D. Bricker ◽  
Vincent Vuik

Abstract. Many coastlines around the world are protected by coastal dikes fronted by shallow foreshores (e.g. saltmarshes and mudflats) that attenuate storm waves and are expected to reduce the likelihood of waves overtopping the dikes behind them. However, most of the studies to-date that assessed their effectiveness have excluded the influence of infragravity (IG) waves, which often dominate in shallow water. Here, we propose a modular and adaptable framework to estimate the probability of coastal dike failure by overtopping waves (Pf). The influence of IG waves on wave overtopping is included using an empirical approach, which is first validated against observations made during two recent storms (2015 and 2017). The framework is then applied to compare the Pf  of the dikes along the Dutch Wadden Sea coast, with and without the influence of IG waves. Findings show that including IG waves results in 1.1 to 1.6 times higher Pf  values, suggesting that safety may be overestimated when they are neglected. This increase is attributed to the influence of the IG waves on the design wave period, and to a lesser extent the wave height, at the dike toe. The spatial variation in this effect, observed for the case considered, highlights its dependence on local conditions – with IG waves showing greater influence at locations with larger offshore waves and shallower water depths. Finally, the change in Pf  due to the IG waves varied significantly depending on the empirical wave overtopping model selected, emphasizing the importance of tools developed specifically shallow foreshore environments.





2006 ◽  
Vol 235 (1-4) ◽  
pp. 75-86 ◽  
Author(s):  
Christian Christiansen ◽  
Gunnild Vølund ◽  
Lars C. Lund-Hansen ◽  
Jesper Bartholdy


2019 ◽  
Vol 34 (7) ◽  
pp. 1751-1768 ◽  
Author(s):  
Frans J. Sijtsma ◽  
Nora Mehnen ◽  
Per Angelstam ◽  
José Muñoz-Rojas


2014 ◽  
Vol 151 ◽  
pp. 34-44 ◽  
Author(s):  
G. Franz ◽  
L. Pinto ◽  
I. Ascione ◽  
M. Mateus ◽  
R. Fernandes ◽  
...  


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