Why Are Shingle Beaches Replacing Sandy Beaches? (Coastal Zone of NW Portugal)

The Dubai coastal zone is defined as a land mass stretching from the Abu Dhabi border in the south to Al Mamzar lagoon in the north, from approximately +4 m DMD (Dubai Municipality Datum) onshore to 10 nautical miles offshore. In its natural state this approximately 70km long coastline consists primarily of long sandy beaches backed by low level dunes and ridges. However, recent infra-structural developments related to trade, tourism and real estate have resulted in significant development within the Dubai coastal zone. These developments have interfered with the natural coastal processes of waves, tidal currents and sediment transport. To understand the dynamics of coastal processes Coastal Zone & Waterways Management Section (CWMS) of Dubai Municipality (DM) developed an advanced coastal real-time monitoring system for coastal management and future planning. This paper provides an overview of the coastal monitoring programme and how these data are used in managing the coastal zone and decision making.

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The impact of ‘protection’ structures on the Ofir-Apúlia coastal zone (NW Portugal)

Quaternary International ◽

10.1016/1040-6182(91)90067-x ◽

1991 ◽

Vol 9 ◽

pp. 81-85 ◽

Cited By ~ 6

Author(s):

Helena Maria Granja ◽

G.Soares de Carvalho

Keyword(s):

Coastal Zone ◽

Nw Portugal ◽

The Impact ◽

Protection Structures

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Rockpool ichthyofauna of Amazon coastal zone: spatial and environmental effects on species distribution

Marine and Freshwater Research ◽

10.1071/mf16275 ◽

2017 ◽

Vol 68 (6) ◽

pp. 1137 ◽

Cited By ~ 1

Author(s):

Tiago Octavio Begot ◽

Bruno Eleres Soares ◽

Leandro Juen ◽

Luciano Fogaça de Assis Montag

Keyword(s):

Community Structure ◽

Coastal Zone ◽

Intertidal Zone ◽

Fish Assemblages ◽

Sandy Beaches ◽

Tidal Range ◽

Spatial Variables ◽

Β Diversity ◽

Principal Factors

The present study analysed the effects of environmental and spatial variables on the structure of fish communities inhabiting rockpools in the Amazon coastal zone to test the hypothesis that environmental characteristics and spatial distribution are the principal factors responsible for community structure. In all, 80 pools were sampled, 40 in the rainy season and 40 in the dry season. The pools were located on five sandy beaches of the Amazon coast. In all, 1303 fish were collected, representing 20 taxa distributed in nine orders and 14 families. The abundance and occurrence of different taxa varied considerably, as did β diversity, ranging from identical to completely different communities. Differences were found in taxa abundance between seasons (rainy and dry) and beach locality. However, for species richness, only differences between seasons were found, showing the effects of spatial and environmental variation in the structure of fish assemblages. This corroborates both spatial and environmental hypotheses of community structure, and reinforces the role of the extreme dynamic conditions, such as tidal range and influence of the rivers that flow into this estuary, in the intertidal zone fish on the Amazon coast.

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Coastal Erosion Risk Assessment, Shoreline Retreat Rates and Causes of Coastal Erosion Along the State of São Paulo Coast, Brazil

Pesquisas em Geociências ◽

10.22456/1807-9806.20320 ◽

2001 ◽

Vol 28 (2) ◽

pp. 459 ◽

Cited By ~ 1

Author(s):

CELIA REGINA DE GOUVEIA E SOUZA

Keyword(s):

Risk Assessment ◽

Coastal Zone ◽

Coastal Erosion ◽

Sandy Beaches ◽

Sao Paulo ◽

The State ◽

São Paulo ◽

Shoreline Retreat ◽

Erosion Risk ◽

Special Rules

Monitoring on coastal erosion problems along the São Paulo shoreline have been carrying out by the author since mid the 80’s, including almost 87% of the whole 430 km length of sandy beaches. Eleven types of indicators of coastal erosional processes have been recognized, which have been attributed to seventeen causes, among them ten correspond to natural mechanisms and seven are due to anthropogenic interference. In this paper is presented rates of shoreline retreat based on the Bruun Rule application for six of the most threatened beaches, for a period as long as 56 years. Risk assessment is also estimated for these six beaches based on two criteria: (i) the total number (sum) of types of coastal erosion indicators found along the shoreline (frequency among the 11 types) and (ii) general spatial distribution (percentage of surface area) of coastal erosion indicators along the shoreline. Causes and effects of the coastal erosional processes are discussed for these six beaches. Results reveal high rates of shoreline retreat, even in non-urbanized areas, as well demonstrate that the six beaches are at very-high risk. Moreover, they indicate that natural mechanisms are very important as cause of coastal erosional processes in São Paulo, sometimes most them the human-induced causes. These studies have widely been supporting the State Plan for Coastal Zone Management, in order to create special rules for occupation and some activities along the shoreline, including engineering works, building and sand beach exploration. Besides, results are being recorded in a geoenvironmental information system for the Coastal Zone of the State of São Paulo (Project SIIGAL), which is in phases of implantation.

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COASTAL PROBLEMS IN SRI LANKA

Coastal Engineering Proceedings ◽

10.9753/icce.v15.200 ◽

1976 ◽

Vol 1 (15) ◽

pp. 200 ◽

Cited By ~ 1

Author(s):

Frans Gerritsen ◽

Suma R. Amarasinghe

Keyword(s):

Sri Lanka ◽

Coastal Zone ◽

Natural Resource ◽

Sandy Beaches ◽

Coastal Environment ◽

Principal Characteristics ◽

Coastal Belt ◽

Island State ◽

Conflicting Interests ◽

Southwest Part

As an island state with about 900 miles of coastline, Sri Lanka is endowed with a large natural resource: its 720 miles of sandy beaches. The coastal zone is under stress by a burgeoning population, living in the coastal belt, and a variety of other demands with conflicting interests. Due to natural causes and interference of men, erosion is a serious problem in the densely populated southwest part of the island. This paper describes the principal characteristics of the coastal environment and discusses the nature of some of the basic problems. In the recommendations, emphasis is placed on the setting up of an organizational structure to study the problems, both in the field and in the laboratory, with respect to the management aspects in the coastal zone.

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Impacts of sand extraction and deposition on the ecosystem recovery rate in the southern coastal zone of Portugal

10.5194/egusphere-egu2020-19110 ◽

2020 ◽

Author(s):

Teresa Drago ◽

Rui Taborda ◽

Sebastião Teixeira ◽

Marcos Rosa ◽

João Pedro Cascalho ◽

...

Keyword(s):

Continental Shelf ◽

Coastal Zone ◽

Benthic Communities ◽

Sandy Beaches ◽

Ecosystem Recovery ◽

Ecosystem Impacts ◽

Sea Bottom ◽

Artificial Nourishment ◽

The Impact ◽

Sand Extraction

Artificial nourishment of sandy beaches using sediment from borrow areas located on the continental shelf is increasingly a recommended solution for reversing the erosion process that affects the coastal zone. However, the impact of sand extraction in the shelf and deposition on the beach on the benthic communities (structure and functioning) is still poorly known, contributing to the lack of information needed for the assessment of Descriptor 6 (Sea-floor integrity) of the Marine Strategy Framework Directive (MSFD).The aim of this work is to evaluate the morphological and ecosystem impacts of sand extraction at the inner shelf, as well as the consequent impacts of sand deposition at the nourished beaches. In this context, short-term and long-term monitoring activities based on a multidisciplinary approach were implemented at new and former borrow areas located in the southern Portugal (Algarve) inner continental shelf and adjacent beaches. These activities include multibeam bathymetric surveys complemented by surface sediment sampling, wave and current measurements, and a fluorescent tracer-marked sand experiment. Moreover, benthic macrofauna composition and structure are being studied at borrow areas (former and new) and at the nourished beaches. The acquired data allow a first assessment of the recovery rates regarding the sea-bottom morphology and benthic communities, and contribute to a better understanding of the involved processes.The authors would like to acknowledge the financial support FCT through project UIDB/50019/2020 &#8211; IDL and ECOEXA project (MAR-01.04.02-FEAMP-0016)

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Assessment of the sensitivity of sandy coasts of the south–eastern part of the Baltic to oil spills

Baltica ◽

10.5200/baltica.2014.27.16 ◽

2014 ◽

Vol 27 (special) ◽

pp. 55-64 ◽

Cited By ~ 3

Author(s):

Nerijus Blažauskas ◽

Dmitry Dorokhov

Keyword(s):

Coastal Zone ◽

Oil Spills ◽

Sandy Beaches ◽

Offshore Platforms ◽

The South ◽

South Eastern ◽

Response Planning ◽

Marine Habitats ◽

Near Shore ◽

The Baltic

The sandy coasts of the south–eastern Baltic Sea are the unique landscape along the shores of Poland, Kaliningrad Oblast (Russia), Lithuania and Latvia. Flat sandy beaches, protective dune ridges and near shore sandy spits are very valuable and attractive resources for human recreation and valuable habitat for wildlife. Intensifying shipping, operation of oil terminals and offshore platforms poses a constant threat not only to coastal and socio–economic resources, but also to sensitive underwater landscapes of marine areas and vulnerable marine habitats. Analysis of environmental sensitivity proved to be an effective tool for national and regional oil spill response planning. However, in order to complete the precise evaluation of near shore and coastal zone sensitivity to possible oil spills there is a need to identify vulnerable coastal sectors and complete detailed mapping of underwater landscapes. This is achieved by developing an integrated methodology for analysis of valuable coastal zone sensitivity to potential oil spills.

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