CIUNR – Ciencias Exactas y Tecnológicas (Arquitectura, Planeamiento y Diseño - Cs. Exactas, Ingeniería y Agrimensura)
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Examinando CIUNR – Ciencias Exactas y Tecnológicas (Arquitectura, Planeamiento y Diseño - Cs. Exactas, Ingeniería y Agrimensura) por Materia "Coastal wetlands"
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Ítem Acceso Abierto Incorporating Infrastructure and Vegetation Effects on Sea Level Rise Predictions in Low-Gradient Coastal Landscapes(2015-12) Rodriguez, Jose F.; Sandi, Steven G.; Trivisonno, Franco N.; Saco, Patricia M.; Riccardi, Gerardo A.At the regional and global scales, coastal management and planning for future sea level rise scenarios is typically supported by modelling tools that predict the expected inundation extent. These tools rely on a number of simplifying assumptions that, in some cases, may result in important overestimation or underestimation of the inundation extent. One of such cases is coastal wetlands, where vegetation strongly affects both the magnitude and the timing of inundation. Many coastal wetlands display other forms of flow restrictions due to, for example, infrastructure or drainage works, which also alters the inundation patterns. In this contribution we explore the effects of flow restrictions on inundation patterns under sea level rise conditions in coastal wetlands. We use a dynamic wetland evolution model that not only incorporates the effects of flow restrictions due to culverts, bridges and weirs as well as vegetation, but also considers that vegetation changes as a consequence of increasing inundation. We apply our model to a coastal wetland in Australia and compare predictions of our model to predictions using conventional approaches. We found that some restrictions accentuate detrimental effects of sea level rise while others moderate them. We also found that some management strategies based on flow redistribution that provide short term solution may result more damaging in the long term if sea level rise is considered.Ítem Acceso Abierto Predicting Sea-level Rise and Infrastructure Effects on Coastal Wetlands(Editorial to conference proceedings of 13th Hydraulics in Water Engineering Conference. HIWE2017, 2017-11-13) Rodriguez, Jose F.; Saco, Patricia M.; Sandi, Steven G.; Saintilan, Neil; Riccardi, Gerardo A.: Climate change predictions for Australia include an accelerated sea-level rise, wich challenges the survival of estuarine wetlands. Furthermore, coastal infrastructure poses and additional constraint on the adaptive capacity of these ecosystems. This paper presents results of wetland evolution based on hydro period and inundation depth experienced by vegetation, and computed using a hydrodynamic model. The application simulates the long-term evolution of wetland on the Hunter Estuary heavily constricted by infrastructure that is undergoing the effects of predicted accelerated sea-level rise. The wetland presents a vegetation zonation sequence mudflats –mangrove –saltmarsh from the seaward margin, but it also affected by compartmentalization due tu internal road embankments and culverts that effectively attenuates tidal inputs. Results of the modelo show that flow attenuation can play a major role in wetland hydrodynamics and that its effects can increase wetland vulnerability under climate change scenarios, particularly in situations where existing infrastructure affects the flow.Ítem Acceso Abierto Rising tides, rising gates: The complex ecogeomorphic response of coastal wetlands to sea-level rise and human interventions(Elsevier, 2018-02-10) Sandi, Steven; Rodriguez, Jose F.; Saintilan, Neil; Riccardi, Gerardo A.; Saco, Patricia M.