coastal defence
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2021 ◽  
Vol 9 (12) ◽  
pp. 1325
Author(s):  
Anh T. K. Do ◽  
Nicolas Huybrechts ◽  
Philippe Sergent

The Authie estuary is characterized by an important southern sand spit and a northern shoreline subject to strong erosion due to the meandering of the coastal river. In order to reduce this erosion, a new soft coastal defence, namely the sand net device (SND), has been implemented inside the Authie estuary. It consists of several nets assembled in an inverted V creating a porous structure and thus trapping sand as shoreline protection. However up to now, little proof has been provided on the explicit influence of this SND on the hydrodynamic pattern and associated morphodynamics. In this paper, field surveys of morphological developments combined with numerical modelling (Telemac-2D/3D) analyze the influence of the SND into flow pattern and morphodynamics. In situ monitoring clearly points out sedimentation around the SND and a deepening of the main channel. Modelling results show that, without SND, erosion is observed around its location. With a SND implemented, the velocity has been reduced and created a deviation in its direction by a circulation around the SND location. The impact area of the structure is around 500 m in both directions, upstream and downstream part.


2021 ◽  
Author(s):  
◽  
Sian Du

<p>Within the Wellington region, there are a number of abandoned military fortifications which were designed as a coastal defence system to protect the harbour from Russian attacks in late 19th Century. Changing circumstances have meant that this coastal defence infrastructure network is no longer functional, and this research aims to bring it back to life. The site chosen for this research investigation is Watts Peninsula, which is enjoyed by only a limited number of the wider public who only visit a small part of the site. The great size and topography of the landscape makes it a serious challenge to manage let alone transform. This site therefore seems to be a great opportunity to explore the disciplinary challenge of how to bring coastal military fortification sites back to life?  Traditionally, the way to bring coastal sites with abandoned fortifications back to life is by treating them as heritage projects. They are protected and sometimes developed as more or less significant tourist destinations that display the significance of military history and heritage. This approach tends to break up the landscape into key areas, with the minimal path system required to connect up the various heritage items and locations on the site. This typical approach severely limits the range and richness of experiencing potential of a site like Watts Peninsula.  This thesis will approach this project by engaging with the countless experiences found within the existing landscape; stepping the normal heritage approach. Topography, slope, vegetation cover, aspect and views were found to produce a great range of effectively separately experienced patches or landscape-experience zones. This thesis sought to understand how the site produced the involuntary types of movement-experiencing that it did and how it differentiated itself into these experience-zones. The types of experiencing that the site produced seemed to have a great deal to do with the interaction of paths/movement through the various mosaic of experience-zones. The aim of the analysis was to discover the actual and potential ways that the site is differentiated into these experience-areas and the actual and potential movement experiences that could allow access to these areas. The design investigation would aim to maximise the number and variety of these movement and experience-zones. The resulting development would aim to spread a complex mosaic-network of experiencing across as much of the site as possible.  This network would be intended to develop in a way where the great richness of possible experiences and the mystery of the site are both increased. The project would require significant funds and so a housing scheme on the southern edge of the site seemed the most obvious way to provide income for such a development. The intended housing development was designed to increase the local population who would have access to the site but hopefully in a manner where the housing would not seriously impact on views to, or the experiences and mystery of the site.  Overall, the design development would be intended to transform this landscape into a destination for varieties of adventuring, exploring and experiencing on a remarkable landscape. With the help of the housing, the possibility of this being an urban adventuring destination and the network of paths and experiencing could then provide something of a way to make the heritage transformation of the fortifications themselves a viable prospect. The treatment of the fortifications has not been engaged with in this project. So, it can be said that this research has attempted to avoid the normal way that coastal military fortifications tend to be developed and proposed, instead, an experience-driven approach to the site and to heritage.</p>


2021 ◽  
Author(s):  
◽  
Sian Du

<p>Within the Wellington region, there are a number of abandoned military fortifications which were designed as a coastal defence system to protect the harbour from Russian attacks in late 19th Century. Changing circumstances have meant that this coastal defence infrastructure network is no longer functional, and this research aims to bring it back to life. The site chosen for this research investigation is Watts Peninsula, which is enjoyed by only a limited number of the wider public who only visit a small part of the site. The great size and topography of the landscape makes it a serious challenge to manage let alone transform. This site therefore seems to be a great opportunity to explore the disciplinary challenge of how to bring coastal military fortification sites back to life?  Traditionally, the way to bring coastal sites with abandoned fortifications back to life is by treating them as heritage projects. They are protected and sometimes developed as more or less significant tourist destinations that display the significance of military history and heritage. This approach tends to break up the landscape into key areas, with the minimal path system required to connect up the various heritage items and locations on the site. This typical approach severely limits the range and richness of experiencing potential of a site like Watts Peninsula.  This thesis will approach this project by engaging with the countless experiences found within the existing landscape; stepping the normal heritage approach. Topography, slope, vegetation cover, aspect and views were found to produce a great range of effectively separately experienced patches or landscape-experience zones. This thesis sought to understand how the site produced the involuntary types of movement-experiencing that it did and how it differentiated itself into these experience-zones. The types of experiencing that the site produced seemed to have a great deal to do with the interaction of paths/movement through the various mosaic of experience-zones. The aim of the analysis was to discover the actual and potential ways that the site is differentiated into these experience-areas and the actual and potential movement experiences that could allow access to these areas. The design investigation would aim to maximise the number and variety of these movement and experience-zones. The resulting development would aim to spread a complex mosaic-network of experiencing across as much of the site as possible.  This network would be intended to develop in a way where the great richness of possible experiences and the mystery of the site are both increased. The project would require significant funds and so a housing scheme on the southern edge of the site seemed the most obvious way to provide income for such a development. The intended housing development was designed to increase the local population who would have access to the site but hopefully in a manner where the housing would not seriously impact on views to, or the experiences and mystery of the site.  Overall, the design development would be intended to transform this landscape into a destination for varieties of adventuring, exploring and experiencing on a remarkable landscape. With the help of the housing, the possibility of this being an urban adventuring destination and the network of paths and experiencing could then provide something of a way to make the heritage transformation of the fortifications themselves a viable prospect. The treatment of the fortifications has not been engaged with in this project. So, it can be said that this research has attempted to avoid the normal way that coastal military fortifications tend to be developed and proposed, instead, an experience-driven approach to the site and to heritage.</p>


2021 ◽  
Vol 51 (1) ◽  
pp. 48-58
Author(s):  
Dovydas Rogulis

In a period of 2015-2020, Lithuanian Armed Forces (LAF) military spending increased twice, thus it enabled to initiate and to arrange significant critical projects that eventually allowed armed forces to upgrade military equipment and tactics. New artillery units, armoured personnel vehicles, air defence systems, anti-tank weapons, radars, anti-drone systems boosted military power of LAF. Tactics switched from anti green men to conventional tactics, where fire and manoeuvre dominates again. Meanwhile, in the same period of time in Kaliningrad the Russian armed forces boosted the number of military personnel, upgraded equipment (most of it to offensive one) and increased military exercises. In order to be prepared, LAF must look for the most efficient ways of defence towards a potential foe. In a near future LAF must decentralize a central military storage thus critical assets could be secured and used by battalions at any time. Moreover, LAF capabilities could be improved by cyber conscripts and non-conventional tactics which could bring extra dividends when a small state fights against technologically advanced adversary. Eventually, with an additional military spending LAF could obtain MLRS artillery, the coastal defence systems and unmanned combat aerial vehicles that could deal with enemy from a safer distance.


2021 ◽  
Vol 9 ◽  
Author(s):  
Rei Itsukushima ◽  
Yuichi Kano

River estuaries provide various ecosystem services, such as nutrient circulation, climate change mitigation, habitats and coastal defence. Information on the various taxonomic groups is collected from large-scale estuaries; however, few studies have focused on river estuaries of small and medium-sized rivers. In particular, information on river estuaries in peninsulas and islands with complex marine environments is lacking. This paper provides basic information on summer fish fauna in the southern part of the Boso Peninsula, Japan. The Boso Peninsula is located at the northernmost point of where the warm current (Kuroshio) reaches and is considered to have highly endemic fish fauna. In total, 28 families, 51 species and 2,908 individuals were collected from the 27 river estuaries. The data are all accessible from the document “database_fish_estuary_boso (http://ipt.pensoft.net/manage/resource.do?r=database_fish_estuary_boso)”. Further, Sicyopterus japonicus and Microphis brachyurus, which appear in estuaries that are influenced by the Kuroshio, were confirmed. However, these species were confirmed in few of the rivers studied, highlighting the importance of habitat conservation.


2021 ◽  
Vol 130 (3) ◽  
Author(s):  
J Prince Prakash Jebakumar ◽  
G Nandhagopal ◽  
S Ragumaran ◽  
Vijaya Ravichandran ◽  
C M Ramakritinan
Keyword(s):  

2021 ◽  
pp. 096834452199586
Author(s):  
James Shelley

Despite the vast academic and popular interest in the Dieppe raid of 19 August 1942, there remains a curious oversight of the German side of the story. This contribution interrogates German sources in order to explore the Dieppe air battle and its consequences from the perspective of the German armed forces. The paper ultimately demonstrates that the Germans learnt much about the role of air power in coastal defence from their experiences at Dieppe, but that the implementation of those lessons was lacking.


2021 ◽  
Author(s):  
Brandon Saverio Knight Bortoluzzi ◽  
Arthur Wrigglesworth

As climate change becomes a more prevalent reality, rising sea levels are increasingly a threat to cities and communities in coastal regions. In light of this it is important to consider architecture’s role in the strategizing of defences and resilience. The major issue with traditionally implemented coastal defence programs, such as those considered by the US Army Corp of Engineers, is their brute force approach is repressively one dimensional, undermining the diverse, and complex realities of any community. Orienting itself in the diverse and complex communities of Atlantic Canada, this thesis operates in the face of these challenges and shortfalls. Instead a coupling of systems, activities and events in these coastal communities can make possible an architecture that accommodates, and makes visible, the realities of its changing environs at a multitude of scales, allowing the continued success of human settlement.


2021 ◽  
Author(s):  
Brandon Saverio Knight Bortoluzzi ◽  
Arthur Wrigglesworth

As climate change becomes a more prevalent reality, rising sea levels are increasingly a threat to cities and communities in coastal regions. In light of this it is important to consider architecture’s role in the strategizing of defences and resilience. The major issue with traditionally implemented coastal defence programs, such as those considered by the US Army Corp of Engineers, is their brute force approach is repressively one dimensional, undermining the diverse, and complex realities of any community. Orienting itself in the diverse and complex communities of Atlantic Canada, this thesis operates in the face of these challenges and shortfalls. Instead a coupling of systems, activities and events in these coastal communities can make possible an architecture that accommodates, and makes visible, the realities of its changing environs at a multitude of scales, allowing the continued success of human settlement.


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