Flood risk assessment in a coastal lagoon under present and future scenarios: Ria de Aveiro case study

Lopes, Carina L.; Alves, Fátima L.; Dias, João Miguel

doi:10.1007/s11069-017-3025-x

Cited by 22 publications

(33 citation statements)

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“…The research was focused on the Ria de Aveiro (Figure 1) lagoon, an area widely studied and used as a natural laboratory for several inter-disciplinary research activities [40][41][42][43][44][45][46][47][48][49][50]. It is a lagoon located on the Northwest Atlantic coast of Portugal (40 • 38 N, 8 • 45 W), 45 km long and 10 km wide, covering an area ranging from 66 to 83 km 2 , at low and high tide, respectively.…”

Section: The Study Areamentioning

confidence: 99%

“…Winds and waves play a minor role in local hydrodynamics when compared to the tides. Fortunato et al [51] found that the maximum contribution of wind stress on water levels is typically lower than 0.05 m. Vaz et al [52] found that waves with significant height (4 m) only produce elevations of approximately 0.2 m. The lagoon has suffered several changes in the past caused by both natural and anthropogenic factors that locally reconfigure its morphology, affecting the tidal propagation and the hydrodynamics [40][41][42][43]. The amplitude of M 2 tidal constituent has increased by a rate of 2.8 mm yr −1 between 1976 and 2013 as a consequence of the main channels deepening [39][40][41].…”

Section: The Study Areamentioning

confidence: 99%

“…Previous studies concerning the lagoon hydrodynamic status under future climate scenarios were performed by Lopes and Dias [40,41], Lopes et al [42,43], and Vargas et al [44]. Lopes and Dias [40] studied the influence of the mean sea level rise, MSLR, on the lagoon tidal dynamics through numerical modelling.…”

Section: Introductionmentioning

confidence: 99%

“…They found that MSLR will change the tidal propagation within the lagoon, projecting an increase of the amplitude of the M 2 constituent and a decrease of the phase. Lopes et al [42,43] and Lopes and Dias [40,41] investigated the influence of MSLR on the lagoon water levels and inundation patterns and found that MSLR will increase the water levels and the extension of the flooded areas, endangering the main lagoon margins. The studies further highlight that the margins holding agricultural activities are highly vulnerable to saltwater intrusion.…”

Section: Introductionmentioning

confidence: 99%

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Climate Change Impact in the Ria de Aveiro Lagoon Ecosystem: A Case Study

Lopes

Dias

2019

JMSE

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Climate change and global sea-level rise are major issues of the 21st century. The main goal of this study is to assess the physical and biogeochemical status of the Ria de Aveiro lagoon (Portugal) under future climate scenarios, using a coupled physical/ eutrophication model. The impact on the lagoon ecosystem status of the mean sea level rise (MSLR), the amplitude rise of the M2 tidal constituent (M2R), the changes in the river discharge, and the rising of the air temperature was investigated. Under MSLR and M2R, the results point to an overall salinity increase and water temperature decrease, revealing ocean water dominance. The main lagoon areas presented salinity values close to those of the ocean waters (~34 PSU), while a high range of salinity was presented for the river and the far end areas (20–34 PSU). The water temperature showed a decrease of approximately 0.5–1.5 °C. The responses of the biogeochemical variables reflect the increase of the oceanic inflow (transparent and nutrient-poor water) or the reduction of the river flows (nutrient-rich waters). The results evidenced, under the scenarios, an overall decreasing of the inorganic nitrogen concentration and the carbon phytoplankton concentrations. A warm climate, although increasing the water temperature, does not seem to affect the lagoon’s main status, at least in the frame of the model used in the study.

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Section: The Study Areamentioning

confidence: 99%

Section: The Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Climate Change Impact in the Ria de Aveiro Lagoon Ecosystem: A Case Study

Lopes

Dias

2019

JMSE

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“…Over-exploitation of species in the intertidal areas [81], habitat destruction [82,83], and abandoned salt marshes call for measures to protect natural values and biodiversity [84,85]. In addition, flood risks aggravated by the shoreline retreat [86,87] and oil spills from nautic activities [88] are also increased causes of concern.…”

Section: Background Featuresmentioning

confidence: 99%

Governance for Sustainability of Estuarine Areas—Assessing Alternative Models Using the Case of Ria de Aveiro, Portugal

Fidélis

Teles

Roebeling

et al. 2019

Water

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Estuaries are one of the most productive and complex types of ecosystems supporting a wide range of economic activities. Departing from a set of governance problems and emergent goals, such as sustainability or climate change adaptation faced by an estuarine case study area, Ria de Aveiro, in Portugal, this article assesses the adequacy of alternative governance models under the existing water resources legal framework and traditional political culture. It shows that apart from the centrally-based compliance model, all other alternatives require high degrees of institutional reforms. Moreover, although the model based on a dedicated new agency, long preferred by many users of Ria de Aveiro, is the most understandable and focused, it does not assure the pursuance of adaptability or collaboration, which are considered essential for estuary governance. As it relies on collective action and multi-level and multi-agent contexts, estuarine governance may require a new institutional design. Where one begins a process of institutional change, however, is not a simple issue to address and demands a deeper analysis, particularly on the types of required institutional changes, as well as on their impacts on policy and decision-making outcomes over estuarine environments and associated socio-ecological networks.

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Assessing salt marsh loss and degradation by combining long‐term LANDSAT imagery and numerical modelling

et al. 2021

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The precise evaluation of the conservation status of salt marshes, the understanding of the mechanisms behind loss and degradation and the anticipation of future threats are fundamental to assist management solutions able to reverse the declining trend observed in these environments. Previous methods combining remote sensing and hydrodynamic modelling have been revealed to be effective in assessing degradation in restricted marshes, but unable to characterise dynamics of marshes at the estuarine scale. This study proposes an alternative methodology to identify priority areas for conservation by combining LANDSAT satellite remote sensing and numerical modelling. Using the Ria de Aveiro as case-study, the main objectives of this work are to: (1) identify vegetation loss and degradation in estuarine marshes; (2) determine the mechanisms behind marsh deterioration; (3) anticipate future threats posed by climate-induced mean sea level rise and; (4) provide management solutions aiming to protect and recover degraded salt marshes. LANDSAT imagery reveals that the most deteriorated salt marshes are located on the central and upper lagoon regions, and the numerical results support that marsh loss and degradation result from the increased tidal action triggered by the deepening of the lagoon channels. The increase in tidal currents promoted the erosion of marsh shoreline, whereas the changes in the inundation patterns over the intertidal areas triggered interior drowning. Climate-induced mean sea level rise will likely exacerbate marsh deterioration, increasing the urgency to implement a management plan aiming to protect marshes from erosion and promote sedimentation in submerged marshes, to ensure their sustainability. K E Y W O R D Smarsh drowning, marsh shoreline erosion, Ria de Aveiro, salt marsh management, tidal dynamics | INTRODUCTIONSalt marshes are considered among the most valuable and productive ecosystems in the world, providing a broad range of services, such as nutrient regeneration, primary production, habitat for marine species and coastal defence (Boorman, 1999). Despite their multiple values, salt marsh area and condition are declining globally, due to growing threats posed by both socioeconomic ('human') and biogeophysical ('natural') actions, exacerbated by climate changes impacts (Mariotti & Carr, 2014). In recognition to their value and to reverse this tendency, management and conservation policies for these habitats have been developed and implemented all over the world; however, these proved to be insufficient in many systems, which continue to degrade (Hansen & Reiss, 2015). Mariotti (2016) summarised three major

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Flood risk assessment in a coastal lagoon under present and future scenarios: Ria de Aveiro case study

Cited by 22 publications

References 36 publications

Climate Change Impact in the Ria de Aveiro Lagoon Ecosystem: A Case Study

Climate Change Impact in the Ria de Aveiro Lagoon Ecosystem: A Case Study

Governance for Sustainability of Estuarine Areas—Assessing Alternative Models Using the Case of Ria de Aveiro, Portugal

Assessing salt marsh loss and degradation by combining long‐term LANDSAT imagery and numerical modelling

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