Morphological changes, beach inundation and overwash caused by an extreme storm on a low-lying embayed beach bounded by a dune system (NW Mediterranean)

The geomorphological evolution of a low-lying, micro-tidal sandy beach in the western Mediterranean, Pals beach, was characterized using airborne Light Detection and Ranging (LiDAR) data. Data were collected in prior to and six months after the impact of an extreme storm with a return period of approx. 50 years, with the aim of characterizing the beach's response to the storm. The use of repeated high-resolution topographic data to quantify beach geomorphic changes has allowed assessment of the accuracy of different proxies for estimating beach volume changes. Results revealed that changes in the shoreline position cannot accurately reproduce beach volume changes on low-lying beaches where overwash processes are significant. Observations also suggested that volume estimations from beach profiles do not accurately represent subaerial volume changes at large profile distances on beaches with significant alongshore geomorphological variability. Accordingly, the segmentation of the beach into regularly spaced bins is proposed to assess alongshore variations in the beach volume with the accuracy of the topographic data. The morphological evolution of Pals beach during the study period showed a net shoreline retreat (- 4 m) and a significant sediment gain on the subaerial beach (+ 7.5 m3/m). The net gain of sediment is mostly due to the impact of the extreme storm, driving significant overwash processes that transport sediment landwards, increasing volume on the backshore and dunes. The increase of volume on the foreshore and the presence of cuspate morphologies along the shoreline also evidence post-storm beach recovery. Observed morphological changes exhibit a high variability along the beach related to variations in beach morphology. Changes in the morphology and migration of megacusps result in a high variability in the shoreline position and foreshore volume changes. On the other hand, larger morphological changes on the backshore and larger inundation distances occur when the beach and the dunes are lower, favouring the dominance of overwash. The observed storm-induced morphological changes differ from predicted beach storm impacts because of spatial and temporal variations in the beach morphology, suggesting that detailed morphological parameters and indicators used for predicting beach vulnerability to storms should be regularly updated in order to represent the pre-storm beach conditions. Finally, observed morphological changes in Pals Bay evidenced a different behaviour between natural and urban areas, with better post-storm beach recovery on natural areas where the beach is not artificially narrowed.Peer ReviewedPostprint (author's final draft

Fish pass design - criteria for the design and approval of fish passes and other structures to facilitate the passage of migratory fish in rivers

Many of British rivers hold stocks of salmon (Salmo salar L.) and sea trout (Salmo trutta L.) and during most of the year some of the adult fish migrate upstream to the head waters where, with the advent of winter, they will eventually spawn. For a variety of reasons, including the generation of power for milling, improving navigation and measuring water flow, man has put obstacles in the way of migratory fish which have added to those already provided by nature in the shape of rapids and waterfalls. While both salmon and sea trout, particularly the former, are capable of spectacular leaps the movement of fish over man-made and natural obstacles can be helped, or even made possible, by the judicious use of fish passes. These are designed to give the fish an easier route over or round an obstacle by allowing it to overcome the water head difference in a series of stages ('pool and traverse' fish pass) or by reducing the water velocity in a sloping channel (Denil fish pass). Salmon and sea trout make their spawning runs at different flow conditions, salmon preferring much higher water flows than sea trout. Hence the design of fish passes requires an understanding of the swimming ability of fish (speed and endurance) and the effect of water temperature on this ability. Also the unique features of each site must be appreciated to enable the pass to be positioned so that its entrance is readily located. As well as salmon and sea trout, rivers often have stocks of coarse fish and eels. Coarse fish migrations are generally local in character and although some obstructions such as weirs may allow downstream passages only, they do not cause a significant problem. Eels, like salmon and sea trout, travel both up and down river during the course of their life histories. However, the climbing power of elvers is legendary and it is not normally necessary to offer them help, while adult silver eels migrate at times of high water flow when downstream movement is comparatively easy: for these reasons neither coarse fish nor eels are considered further. The provision of fish passes is, in many instances, mandatory under the Salmon and Freshwater Fisheries Act 1975. This report is intended for those involved in the planning, siting, construction and operation of fish passes and is written to clarify the hydraulic problems for the biologist and the biological problems for the engineer. It is also intended to explain the criteria by which the design of an individual pass is assessed for Ministerial Approval

Introducing heterarchy : a relational-contextual framework within the study of International Relations : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Politics at Massey University, Manawatu, New Zealand

This thesis posits that for too long International Relations (IR) has been overly rigid and insular, discouraging cross-disciplinary cooperation within the social sciences and becoming increasingly irrelevant to policy-makers. IR academia tend to stick rigidly to their theoretical paradigms in interpreting the real world, straight-jacketing their thinking into theories that limit analysis. However, humans think relationally and contextually so why not apply this form of thinking to IR? Heterarchy, the theoretical framework presented here, seeks to overcome this silo effect, to expand IR’s relevance, and encompass previously barred academic areas to the sub-discipline. This thesis presents a new relational-contextual framework within which empirical variables can be situated to provide a different understanding of actors’ actions and speech acts within the IR field.1 Heterarchy sits in part within both foundationalist and anti-foundationalist ontologies, challenging both positivist and post-positive schools by relating the world through relationalcontextual rationales. Heterarchy suggests that IR (referring to the practice of international affairs) can best be understood from a sub-systemic viewpoint where the behavior of actors can only be observed by knowing the differing contexts between ‘self’ and ‘other’, and where relations continuously form and shape each actor; hence its relational-contextual nature. These relational-contexts are initiated through certain identifiable catalysts which stimulate similarly identifiable variables to expose actor relationships to the observer. While this does have constructivist and relativist underpinnings, heterarchy differentiates itself from both in terms of its approach and methodology. Having laid out this conceptual framework, the thesis then investigates how heterarchy might work empirically by exploring the Japanese-South Korean relationship which defies conventional understandings

Study on Mollusk and Algae or Phytoplankton Community in Southeast Waters of Bali

A study was carried out to observe the relation between mollusk with algae or phytoplankton in southeast waters of Bali. The study was conducted at Mertasari, Sindhu, Serangan, Purnama, and Kethewel beach. Shannon-Wiener diversity index was used to analyze the ecological condition, supported by analysis on water quality including dissolved oxygen (DO), biological oxygen demand 5 days (BOD5), water pH, and water salinity. There were 34 species of phytoplankton found in this study. The most predominant phytoplankton species in each beach were Navicula sp at Mertasari, Nitzschia sp at Sindhu, Pseudo-nitzschia sp at Purnama, Chaetoceros sp at Kethewel. Observation on macro algae showed that Ulva sp was to be the most predominant species in Serangan, Mertasari, and Sindhu beach (17.95, 16.25, and 17.81%). In mollusk observation, gastropod groups showed to be higher number than bivalve group. Nassarius sp showed to be the most predominant in Serangan beach (13.33%), while Ruditapes sp was predominant in Mertasari and Sindhu beach (11.59% and 14.81%). The highest diversity index of phytoplankton was shown by Kethewel beach (H = 1.35), while the lowest was shown by Shindu beach (H = 0.95). The highest diversity index of macroalgae was shown by Serangan beach which showed H = 2.08, while the lowest was shown by Purnama beach which showed H = 0.69. Serangan beach showed the highest diversity index (H = 2.72) with E = 0.66 compared to another locations, while Kethewel beach showed the lowest diversity index (H = 0.69 and E = 1). There was a relation between the existences of gastropod as the highest number of mollusk and Ulva sp as the gastropod feed

Sixteen years of bathymetry and waves at San Diego beaches.

Sustained, quantitative observations of nearshore waves and sand levels are essential for testing beach evolution models, but comprehensive datasets are relatively rare. We document beach profiles and concurrent waves monitored at three southern California beaches during 2001-2016. The beaches include offshore reefs, lagoon mouths, hard substrates, and cobble and sandy (medium-grained) sediments. The data span two energetic El Niño winters and four beach nourishments. Quarterly surveys of 165 total cross-shore transects (all sites) at 100 m alongshore spacing were made from the backbeach to 8 m depth. Monthly surveys of the subaerial beach were obtained at alongshore-oriented transects. The resulting dataset consists of (1) raw sand elevation data, (2) gridded elevations, (3) interpolated elevation maps with error estimates, (4) beach widths, subaerial and total sand volumes, (5) locations of hard substrate and beach nourishments, (6) water levels from a NOAA tide gauge (7) wave conditions from a buoy-driven regional wave model, and (8) time periods and reaches with alongshore uniform bathymetry, suitable for testing 1-dimensional beach profile change models

Beach fale tourism in Samoa: The value of indigenous ownership and control over tourism

This working paper reports on the findings of a research project which explores the budget tourism sector in Samoa as epitomized by beach fale tourism. Its main aim is to draw attention to the legitimacy and value of this often overlooked sector of the tourism market. As such it documents ways in which beach fale have contributed to development in Samoan villages, as well as identifying constraints to improvement of this sector. It concludes with a number of recommendations as to how sustainable, equity-enhancing development of tourism in Samoa can be supported in the future. Readers seeking a thorough understanding of beach fale tourism, including contextual information on the nature of tourism development in Samoa, and specific information concerning training and financial support for beach fale operators and impressions of tourists, are referred to an earlier paper in this series (CIGAD Working Paper No.3/2005 – see Scheyvens 2005b). The beach fale industry has contributed significantly to the development of a number of Samoan villages. There have been widespread multiplier effects for village communities as the fale are constructed using mainly local materials and expertise, and their owners often purchase items such as fruit, vegetables, seafood, and mats from the village and hire village labour during busy periods. Guests also contribute to the wider village through various means such as purchases made from village shops, use of local transport, and contributions to the collection plate when they attend a church service. Another benefit of beach fale tourism which has not been officially acknowledged is that it has restored the pride of many villagers in their home environment. Most Samoans feel genuinely honoured when people from all over the world come to visit their village and learn about their culture, and consequently community members contribute enthusiastically to village beautification efforts. Furthermore, the economic rejuvenation of some villages through beach fale tourism has reduced rural-urban migration as young people feel they now can stay in their home village and have a viable future. Despite the significant growth of the beach fale sector and the benefits this has brought to rural communities, it has been overlooked, disregarded, and in some cases harshly criticised by various commentators. Beach fale are seemingly invisible to those estimating the number of beds available for tourists in Samoa, for example, as they do not include beach fale accommodation in their estimates. Similarly, an Asian Development Bank report on Samoa (ADB 2000) with an entire chapter on tourism does not mention that beach fale exist. Outside consultants and investors, meanwhile, have voiced frustration with the communal land tenure system and its requirement for consensus in decisions concerning land use, as this has impeded the development of large resorts in prime beach side locations; instead, small clusters of beach fale occupy some of the best coastal sites in Samoa. This also irks some Samoans involved in the tourism industry, as they feel that there are too many run-down beach fale, forming a scar on the landscape. Related to this point, it has been suggested that the development of a strong budget tourism sector is not good for Samoa’s image because a country so well endowed with natural and cultural assets should be home to high class resorts which attract high spending tourists. In addition there is some jealousy of the success of beach fale from the owners of small, lower class hotels, who now see many of their former clientele (such as staff of government agencies) preferring to stay in beach fale; it is likely that this jealousy contributes to negative perceptions of what beach fale have to offer the tourism sector. The Government is now introducing changes which could undermine beach fale tourism in some areas. Firstly, an amendment bill was passed in Parliament in on June 26, 2003, to encourage more foreign investment in higher class resorts. This involves the government playing a stronger role in assisting outsiders to lease land, and tax breaks being given to new hotel/resort developments, with the size of the tax relief being proportional to the size of the hotel/resort. This may see more land moving out of community hands, at least temporarily, in the future, but it is unclear if this is also signaling less government support for the small-scale beach fale initiatives. Secondly, partly in response to concerns from within the tourism industry about supposed substandard accommodation and facilities provided by some beach fale operations, staff of the Samoan Tourism Authority are formalizing planning procedures by developing ‘minimum standards’ which tourist accommodation providers must abide by if they want to be promoted or endorsed by the Government. Depending on the final details of these minimum standards, this may mean that less wealthy families will be unlikely to establish a beach fale venture, as greater resources will be required to meet the minimum standards. Based on these findings and an earlier paper ( 2005b), this working paper makes four key recommendations: • Firstly, village leaders together with Samoan Tourism Authority (STA) personnel need to regularly monitor the development of beach fale (through personal observation, village meetings, and consultation with tourists), and to control this development where necessary, in order to: a) maximise the benefits villagers gain from the fale (for example, in order to maintain their popularity beach fale need to continue to offer tourists a unique cultural experience in a relaxed environment - if some villages are oversubscribed with beach fale enterprises and owners start haggling for custom, this is likely to deter tourists) b) minimise inconvenience/harm to local people from tourism. To date, matai have effectively put in place good social controls on tourist behaviour but they may need to pay more attention to environmental issues (such as sewage disposal and use of fresh water by beach fale), and to equity issues ( ensuring that beach fale development does not impinge heavily on access of local people to the beach or marine resources) otherwise resentment towards tourism could build up over time. • Secondly, the Samoan Tourism Authority and donors such as NZAID should continue to support beach fale enterprises and to ensure that in doing so they offer assistance to a diverse range of enterprises, from the very basic to those that are now well promoted and more up-market. While it would be easy to overlook the basic beach fale enterprises, they effectively provide an important livelihood strategy particularly for those who are not in a strong economic position withintheir village, and it is operators of these enterprises who are in more need of help with matters like publicity, marketing, and service provision. • Thirdly, officials need to recognize the importance of the domestic tourism market, and to encourage development of this market both because a) it is a very good source of revenue and it is less fickle than the international tourism market, and b) this would signal that the government is interested in the recreation and well-being of its own citizens, rather than just offering up the country’s best scenic assets for the enjoyment of foreign tourists. • Fourthly, there is further potential to develop the beach fale sector, but advice needs to be provided to villagers about development of associated products and services, such as beach clothing, souvenirs, food or tours, so that they are aware of viable options which do not just replicate the basic beach fale concept. The Samoan Tourism Authority, Small Business Enterprise Centre, donors and other relevant agencies could assist villagers to identify and develop appropriate products and services to enhance the beach fale experience. In summary, this paper shows how a unique model of tourism development centred on basic beach fale has evolved in Samoa and is reaping considerable benefits for rural people. Samoa has until recently eschewed many advances from international interests because of land tenure issues, preferring to take a path which has supported the development of a strong and dynamic budget beach fale sector (see 2005a, 2005b). This paper suggests that although beach fale tourism does not attract high spending tourists, it should be considered ‘high value’ in terms of community development because most economic benefits are retained locally, it is based upon local skills and resources, it involves cultural education of guests, it supports conservation of resources, and it does this all in the context of high levels of local ownership, participation and control

Constructing a Theory of Educational Administration

The development of administrative theory has long been a quest for scholars in the field of educational administration. The beginnings of the development of a theory of educational administration began with Griffiths‘ (1959) now classic Administrative Theory, where he outlined the problem and noted, ―The field [of educational administration] is no longer neatly defined [and] textbooks are characterized by a search for the substance of administration and for a theory which binds the substance together‖ (p. 1-2). The need for such a theory has been important because a theory could serve to guide and support practice, even though the link between theory and practice has not always been articulated. In addition, the complex interactive nature of educational administration and the different school contexts have made it difficult to establish a uniform administrative theory. English (2002) called the theory-practice gap the ―Gordian Knot.‖ He noted, ―The theory-practice gap is a direct result of continuing to use inductive methods in creating theories for use in studying schools and the practices in them. The creation of … theories in educational administration … are not likely to come about under the way theories are constructed…in much of the present research‖ (p. 3)

The Control of Apple Blotch

Exact date of bulletin unknown.PDF pages: 1