Northwest Coast of Portugal – Past behavior and future coastal defense options

Costa, Sandra; Coelho, Carlos

doi:10.2112/si65-156.1

Cited by 17 publications

(7 citation statements)

References 1 publication

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“…This progressive long-term erosional trend, in which the frontal dunes have been progressively destroyed, under the action of winter waves, has been caused by the deficit in sediment supply from Douro River, which decreased from 1.5 million m 3 / year to about 0.25 million m 3 / year during the last decade (Coelho et al, 2009;Marinho et al, 2018). In this coastal stretch, beach erosion effects have been propagated southward due to sediment blockage by manmade structures (Costa and Coelho, 2013;Pereira and Coelho, 2013). The northern sector of the beach has been the more affected, largely induced by the groin built in 2003 (Baptista et al, 2014).…”

Section: Study Site and Topographic Surveysmentioning

confidence: 98%

Wave Impact Analysis on a Beach-Dune System to Support Coastal Management and Nourishment Works: The Showcase of Mira, Portugal

et al. 2022

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At coasts, sandy beach-dune systems act as natural barriers to environmental forcing, preventing coastal flooding and protecting coastal communities. In the context of coastal studies, it is fundamental to identify beach-dune sectors exposed to wave impact to support coastal management and suggest soft engineering interventions. This work examines the morphodynamics of the Mira beach-dune system on the northern-central littoral of Portugal over the winter 2016-2017. Coupling topographic data with the estimation of wave runup and total water level (TWL) timeseries, we proposed an operational framework to spot the beach-dune system sectors most vulnerable to dune collision and overwash. The highest topographic variations occurred in the northern sector of the study area, where overwash events occurred due to low dune crest (DC) elevation. The dune toe (DT) was frequently collided by waves in the central sector, where the upper beach profile was the most variable during winter. Overall, wave collision and overwash events were registered not only during storms, but also during spring tides and mild wave conditions. Results highlight the importance of uploading the intertidal beach slope when computing the total water levels on wave-dominated mesotidal sandy beaches, and therefore, the need for a consistent monitoring program of the coastal zones. Findings of this work also supported the coastal management of beach-dune systems, where regional authorities need to restore dune ridges to prevent further overwash events and erosion. The presented framework can be applied to build a beach-dune system vulnerability map in response to wave forecast and predicted sea-level rise.

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Section: Study Site and Topographic Surveysmentioning

confidence: 98%

Wave Impact Analysis on a Beach-Dune System to Support Coastal Management and Nourishment Works: The Showcase of Mira, Portugal

et al. 2022

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“…The region of Ovar (NW Portugal) hosts three urban areas, has significant value from both industrial and touristic activities, and has rich coastal ecosystems that provide several benefits to the environment and society. With the sediment deficit observed and documented on this stretch of coast [21], as well as emerging concerns related to climatechange-led sea level rises, this region has shown to be particularly vulnerable to coastal erosion. Additionally, the region presents very diverse conditions in the context of coastal adaptation and planning, including stretches protected by groynes and seawalls of varying morphologies, stretches of coast maintained by artificial beach nourishment, stretches protected by dunes, lagoons and other natural features, and completely exposed sections where sea advances are evident.…”

Section: Incca Projectmentioning

confidence: 99%

Participatory Action Research Challenges Amidst the COVID-19 Pandemic: A Review and Comparison across Two European Projects

et al. 2023

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The Coronavirus Disease 2019 (COVID-19) pandemic that spread through the world in 2020 had a major effect on academia. Research projects relying on participatory methods and action research approaches were especially harmed by the restrictions and changes the situation imposed. This study performs a rapid literature review to identify common themes in the narratives of published studies concerning the difficulties of carrying-out participatory research during the COVID-19 pandemic. Perceptions and experiences of the authors of these studies are compiled and summarized. Additionally, insights and lessons learned from two projects in which the authors of this study participated are discussed and used to establish a comparison with the common challenges found in the literature. Over 90% of authors experienced challenges related to digitalization and methodological changes, 70% encountered difficulties with organizational and operational aspects of research, and over 30% felt that personal challenges, as well as issues with participatory aspects of research, were significant. On a positive note, almost 40% of authors from our sample recognize that the pandemic also brought unexpected benefits, such as a reduction in logistical expenses, and the creation of new opportunities for participation. This study adds to the growing body of literature regarding the effects of the COVID-19 pandemic on the research community. Additionally, it comments on the adaptation of participatory action research methods for added sustainability and social inclusion in the face of global crises.

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“…Among natural processes, there are the impacts of chronic erosion processes and of extreme storms, the impacts of which are often enhanced by climatic change-related processes, e.g., an increase of storm intensity and frequency and Sea Level Rise [11,35,37,67,[78][79][80][81][82][83]. Specifically, for the studied area, storm characterization was described by Guisado et al [42] and Molina et al [50]; meanwhile, it seems that Sea Level Rise is not relevant at the studied area [84][85][86].…”

Section: Erosional Dune Systemsmentioning

confidence: 99%

Dune Systems’ Characterization and Evolution in the Andalusia Mediterranean Coast (Spain)

Molina

Manno

et al. 2020

Water

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This paper deals with the characterization and evolution of dune systems along the Mediterranean coast of Andalusia, in the South of Spain, a first step to assess their relevant value in coastal flood protection and in the determination of sound management strategies to protect such valuable ecological systems. Different dune types were mapped as well as dune toe position and fragmentation, which favors dune sensitivity to storms’ impacts, and human occupation and evolution from 1977 to 2001 and from 2001 to 2016. Within a GIS (Geographic Information System) project, 53 dune systems were mapped that summed a total length of ca. 106 km in 1977, differentiating three dune environments: (i) Embryo and mobile dunes (Type I), (ii) grass-fixed dunes (Type II) and (iii) stabilized dunes (Type III). A general decrease in dunes’ surfaces was recorded in the 1977–2001 period (−7.5 × 106 m2), especially in Málaga and Almería provinces, and linked to dunes’ fragmentation and the increase of anthropic occupation (+2.3 × 106 m2). During the 2001–2016 period, smaller changes in the level of fragmentation and in dunes’ surfaces were observed. An increase of dunes’ surfaces was only observed on stable or accreting beaches, both in natural and anthropic areas (usually updrift of ports).

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Northwest Coast of Portugal – Past behavior and future coastal defense options

Cited by 17 publications

References 1 publication

Wave Impact Analysis on a Beach-Dune System to Support Coastal Management and Nourishment Works: The Showcase of Mira, Portugal

Wave Impact Analysis on a Beach-Dune System to Support Coastal Management and Nourishment Works: The Showcase of Mira, Portugal

Participatory Action Research Challenges Amidst the COVID-19 Pandemic: A Review and Comparison across Two European Projects

Dune Systems’ Characterization and Evolution in the Andalusia Mediterranean Coast (Spain)

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