STUDY ON WAVE OVRTOPPING AT JOINT CORNER OF SEAWALLS BY HIGH TIDE AND HIGH WAVE

2021 ◽  
Vol 77 (2) ◽  
pp. I_73-I_78
Author(s):  
Naoki TSURUTA ◽  
Kojiro SUZUKI ◽  
Shota ASAHI ◽  
Tadashi TOMIMOTO ◽  
Shinobu NISHIMORI
Keyword(s):  
High Tide ◽  
High Wave

scholarly journals PROCESS-RESPONSE MODELS FOR DEPOSITIONAL SHORELINES: THE GERMAN AND THE GEORGIA BIGHTS

1978 ◽  
Vol 1 (16) ◽  
pp. 70 ◽  
Author(s):  
Dag Nummedal ◽  
Ian A. Fischer
Keyword(s):  
Simple Model ◽  
Environmental Factors ◽  
High Tide ◽  
Relative Role ◽  
Tidal Inlets ◽  
Dispersal Patterns ◽  
Response Models ◽  
High Wave ◽  
Sediment Dispersal

Sediment dispersal patterns in tidal inlets within the German and the Georgia Bights are found to be controlled by three major environmental factors: (1) the tide range, (2) the nearshore wave energy, and (3) the geometry of the backbarrier bay. Both embayments chosen for study are characterized by high wave energies and low tide ranges on their flanks, and low wave energies and high tide ranges in their centers. The spatial variability in inlet morphology, therefore, contains information on the relative role of tides and waves in inlet sediment dispersal. The paper concludes by proposing a simple model for inlet morphologies for successively greater relative role of tidal currents in the sediment dispersal.

scholarly journals Microplastic pollution on island beaches, Oahu, Hawai`i

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0247224
Author(s):  
Savannah Franklin Rey ◽  
Janet Franklin ◽  
Sergio J. Rey
Keyword(s):  
Wave Energy ◽  
Empirical Data ◽  
Hawaiian Islands ◽  
High Tide ◽  
Storm Tide ◽  
High Wave ◽  
Remote Island ◽  
High Wave Energy ◽  
Very High

We report microplastic densities on windward beaches of Oahu, Hawai`i, USA, an island that received about 6 million tourist visits a year. Microplastic densities, surveyed on six Oahu beaches, were highest on the beaches with the coarsest sands, associated with high wave energy. On those beaches, densities were very high (700–1700 particles m-2), as high as those recorded on other remote island beaches worldwide. Densities were higher at storm tide lines than high tide lines. Results from our study provide empirical data on the distribution of microplastics on the most populated and visited of the Hawaiian islands.

Socioeconomic Challenges faced by Basin’s People in India

Think India ◽  
2019 ◽  
Vol 22 (2) ◽  
pp. 296-304
Author(s):  
Biplab Tripathy ◽  
Tanmoy Mondal
Keyword(s):  
River Basin ◽  
High Tide ◽  
North East ◽  
The People ◽  
Term Basis ◽  
Major River ◽  
River Ganga ◽  
Basin Region ◽  
Basin Area

India is a subcontinent, there huge no of people lived in river basin area. In India there more or less 80% of people directly or indirectly depend on River. Ganga, Brahamputra in North and North East and Mahanadi, Govabori, Krishna, Kaveri, Narmoda, Tapti, Mahi in South are the major river basin in India. There each year due to flood and high tide lots of people are suffered in river basin region in India. These problems destroy the socio economic peace and hope of the people in river basin. There peoples are continuously suffered by lots of difficulties in sort or in long term basis. Few basin regions are always in high alert at the time of monsoon seasons. Sometime due to over migration from basin area, it becomes empty and creates an ultimate loss of resources in India and causes a dis-balance situation in this area.

MONITORING WATER QUALITY IN BALLONA LAGOON: NITRATE LEVEL FLUCTUATION IN LOW AND HIGH TIDE CONDITIONS

2020 ◽  
Author(s):  
Georgina Campos ◽  
◽  
Marleni Estrada ◽  
Patrick Kwan ◽  
Daniel Venegas ◽  
...  
Keyword(s):  
Water Quality ◽  
High Tide ◽  
Level Fluctuation ◽  
Nitrate Level

NODAL CYCLE, QUASI-LUNAR CYCLE, AND FLORIDA CURRENT INFLUENCES ON HIGH TIDE LEVEL IN MIAMI FLORIDA

2020 ◽  
Author(s):  
Martina Rogers ◽  
◽  
Michael C. Sukop ◽  
Jayantha Obeysekera ◽  
Florence George ◽  
...  
Keyword(s):  
High Tide ◽  
Lunar Cycle ◽  
Florida Current ◽  
Tide Level

scholarly journals Environmental Variation and How its Spatial Structure Influences the Cross-Shelf Distribution of High-Latitude Coral Communities in South Africa

Diversity ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 57 ◽  
Author(s):  
Sean N. Porter ◽  
Michael H. Schleyer
Keyword(s):  
South Africa ◽  
Continental Shelf ◽  
High Latitude ◽  
Environmental Variables ◽  
Environmental Gradients ◽  
High Tide ◽  
Environmental Variation ◽  
Shelf Edge ◽  
Spatial Differences ◽  
Coral Communities

Coral communities display spatial patterns. These patterns can manifest along a coastline as well as across the continental shelf due to ecological interactions and environmental gradients. Several abiotic surrogates for environmental variables are hypothesised to structure high-latitude coral communities in South Africa along and across its narrow shelf and were investigated using a correlative approach that considered spatial autocorrelation. Surveys of sessile communities were conducted on 17 reefs and related to depth, distance to high tide, distance to the continental shelf edge and to submarine canyons. All four environmental variables were found to correlate significantly with community composition, even after the effects of space were removed. The environmental variables accounted for 13% of the variation in communities; 77% of this variation was spatially structured. Spatially structured environmental variation unrelated to the environmental variables accounted for 39% of the community variation. The Northern Reef Complex appears to be less affected by oceanic factors and may undergo less temperature variability than the Central and Southern Complexes; the first is mentioned because it had the lowest canyon effect and was furthest from the continental shelf, whilst the latter complexes had the highest canyon effects and were closest to the shelf edge. These characteristics may be responsible for the spatial differences in the coral communities.

Contextualizing Discrimination of Religious and Linguistic Minorities in South Thailand

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Christopher Mark Joll
Keyword(s):  
High Tide ◽  
Historical Context ◽  
Historical Analysis ◽  
Second World War ◽  
Evidence Based ◽  
Relative Importance ◽  
World War ◽  
Intractable Conflict ◽  
Comparative Historical Analysis ◽  
Second World

Abstract This article explores how scholarship can be put to work by specialists penning evidence-based policies seeking peaceful resolutions to long-standing, complex, and so-far intractable conflict in the Malay-Muslim dominated provinces of South Thailand. I contend that more is required than mere empirical data, and that the existing analysis of this conflict often lacks theoretical ballast and overlooks the wider historical context in which Bangkok pursued policies impacting its ethnolinguistically, and ethnoreligiously diverse citizens. I demonstrate the utility of both interacting with what social theorists have written about what “religion” and language do—and do not—have in common, and the relative importance of both in sub-national conflicts, and comparative historical analysis. The case studies that this article critically introduces compare chapters of ethnolinguistic and ethnoreligious chauvinism against a range of minorities, including Malay-Muslim citizens concentrated in the southern provinces of Pattani, Yala, and Narathiwat. These include Buddhist ethnolinguistic minorities in Thailand’s Northeast, and Catholic communities during the second world war widely referred to as the high tide of Thai ethno-nationalism. I argue that these revealing aspects of the southern Malay experience need to be contextualized—even de-exceptionalized.

Design of experimental food patches to measure foraging intensity for octopus: a case study with the giant Pacific octopus Enteroctopus dofleini

2020 ◽  
Author(s):  
Stephanie Chancellor ◽  
David Scheel ◽  
Joel S Brown
Keyword(s):  
Predation Risk ◽  
Foraging Behaviour ◽  
Habitat Preferences ◽  
High Tide ◽  
Intertidal Habitat ◽  
Camera System ◽  
Subtidal Habitat ◽  
Enteroctopus Dofleini ◽  
Nontarget Species

ABSTRACT In a study of the foraging behaviour of the giant Pacific octopus Enteroctopus dofleini, we designed two types of experimental food patches to measure habitat preferences and perceptions of predation risk. The first patch successfully measured giving-up densities (GUDs), confirmed by octopus prey presence and higher foraging at sites with historically greater octopus presence. However, nontarget foragers also foraged on these experimental food patches. Our second floating patch design successfully excluded nontarget species from subtidal patches, and from intertidal patches at high tide, but allowed for foraging by E. dofleini. The second design successfully measured GUDs and suggested that octopus preferred foraging in a subtidal habitat compared to an intertidal habitat. We ascribe the higher GUD in the intertidal habitat to its higher predation risk relative to the subtidal habitat. The second patch design seems well suited for E. dofleini and, in conjunction with a camera system, could be used to provide behavioural indicators of the octopus's abundance, perceptions of habitat quality and predation risk.

Urban flood analysis for Pearl River Delta cities using an equivalent drainage method upon combined rainfall-high tide-storm surge events

2021 ◽  
pp. 126293
Author(s):  
Yejia Qiang ◽  
Limin Zhang ◽  
Jian He ◽  
Te Xiao ◽  
Honghao Huang ◽  
...  
Keyword(s):  
Storm Surge ◽  
Pearl River Delta ◽  
High Tide ◽  
River Delta ◽  
Pearl River ◽  
Urban Flood ◽  
Flood Analysis
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