Unidades Geomorfológicas De Portugal Continental

Pereira, D. I.; Pereira, Paulo; Santos, Leonardo José Cordeiro; Silva, Julio Manoel França da

doi:10.20502/rbg.v15i4.549

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…The hypsometric and slope maps were generated by the Digital Terrain Model (DTM) of Alos Palsar (2020), with a spatial resolution of 12.5 m. The relief classes followed the proposal of the Brazilian Agricultural Research Corporation (EMBRAPA 1979): Flat − 0% − 3%; Mildly undulating − 3% − 8%; Wavy − 8% − 20%; Strongly undulating − 20% − 45%; Mountainous − 45% − 75% and Scarp > 75%. This map contains topographic pro les and a table with the hierarchical compartmentalization of the relief based on Ross (1992), a methodological proposal applied by Pereira et al (2014) in the identi cation of the relief units of Portugal.…”

Section: Materials and Operational Proceduresmentioning

confidence: 99%

Biogeophysical Context and Land Use and Coverage – Human Interventions in the Sado Estuarine Municipalities (Portugal)

Alves

Silva

Inácio

et al. 2022

Preprint

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Anthropogenic modifications are changes in the landscape resulting from interventions on natural elements, usually related to the types of land use and coverage. This article analyzes the main biophysical components of the estuarine municipalities of the Sado River - emphasizing geology, geomorphology and anthropogenic derivations of the landscape. The systemic principles are the theoretical-methodological support of this integrated analysis. Cartographic materials, remote sensing techniques, Geographic Information Systems (GIS) and fieldwork were used. The components most impacted by anthropogenic interventions are: hydrography - with dams in river channels, which alter the flow dynamics and hydrosedimentary processes, favoring the occurrence of erosion in the tidal plain and siltation in the estuary, which requires dredging to maintain activity in the port of Setúbal; vegetation, soils, geology and geomorphology - with mining, which directly implies the suppression of vegetation and soils, the dismantling of relief and rocks, reduces biodiversity, characterizes the landscape, and is a potential risk of soil and water contamination. In the tidal plain originally colonized by salt marshes, there are significant economic activities: rice farming, salt culture, aquaculture and industrial area. Touristic developments are installed on the recent features of the coastal plain of the Tróia peninsula. These anthropogenic derivations affect the systemic relationships of natural elements and cause changes in the landscape. This integrated analysis can contribute to better planning and management of activities with environmental and social sustainability for the municipalities in the study area.

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Section: Materials and Operational Proceduresmentioning

confidence: 99%

Biogeophysical Context and Land Use and Coverage – Human Interventions in the Sado Estuarine Municipalities (Portugal)

Alves

Silva

Inácio

et al. 2022

Preprint

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“…To the north, this region falls into the Cávado river catchment, while to the south it falls into the Ave river catchment. Braga region is located in the following geomorphological units [27]: Central System (1st level unit) and Entre Douro e Minho Open Valleys and Hills and Atlantic Front of NW Iberia Mountains (2nd level units). The region is also located in the Central-Iberian Zone of the Iberian Massif [28].…”

Section: Hydrogeological Frameworkmentioning

confidence: 99%

Wildfire Effects on Groundwater Quality from Springs Connected to Small Public Supply Systems in a Peri-Urban Forest Area (Braga Region, NW Portugal)

Mansilha

Melo

Martins

et al. 2020

Water

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Peri-urban areas are territories that combine urban and rural features, being particularly vulnerable to wildfire due to the contact between human infrastructures and dense vegetation. Wildfires may cause considerable direct and indirect effects on the local water cycle, but the influence on groundwater quality is still poorly understood. The aim of this study was to characterize the chemistry of several springs connected to small public supply systems in a peri-urban area, following a large wildfire that took place in October 2017. Groundwater samples were collected in four springs that emerged within burned forests, while control samples were from one spring located in an unburned area. Sampling took place from October 2017 until September 2018, starting 15 days after the wildfire occurrence, to evaluate the influence of the time after fire and the effect of precipitation events on groundwater composition. Groundwater samples collected in burned areas presented increased content of sulfate, fluoride and nitrogen and variability in pH values. Iron, manganese and chromium contents also increased during the sampling period. Post-fire concentrations of polycyclic aromatic hydrocarbons (PAHs), mainly the carcinogenic ones, increased especially after intense winter and spring rain events, but the levels did not exceed the guideline values for drinking water.

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“…A rough relief, with poor vegetation cover, occurs in the Serra do Gerês and in the central part of the Serra da Peneda, differentiating them from the surrounding mountainous areas (Pereira et al 2014) (Fig. 10.5).…”

Section: The Granite Landscapes Of Peneda-gerês National Parkmentioning

confidence: 99%

The Granite and Glacial Landscapes of the Peneda-Gerês National Park

Pereira

2020

World Geomorphological Landscapes

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Granite and glacial landforms are presented as the main geomorphological landscape features of the Peneda-Gerês National Park. The park was established in 1971 and it is the only national park and most important protected area in Portugal. The aesthetic attractiveness is supported mainly by the distinct granite landscape of the Gerês and Peneda Mountains, where the post-orogenic Variscan Gerês granite facies occurs. The rugged relief is poorly covered by vegetation, differentiating it from the surrounding mountainous areas and the most distinctive landforms are bornhardts, locally named as "medas". Typical glacial landforms, such as U-shaped valleys, cirques and moraines, express the sheltered character of a low-altitude glaciation, which is of great significance in the context of the Pleistocene glaciation in Southern Europe.

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Unidades Geomorfológicas De Portugal Continental

Cited by 16 publications

References 5 publications

Biogeophysical Context and Land Use and Coverage – Human Interventions in the Sado Estuarine Municipalities (Portugal)

Biogeophysical Context and Land Use and Coverage – Human Interventions in the Sado Estuarine Municipalities (Portugal)

Wildfire Effects on Groundwater Quality from Springs Connected to Small Public Supply Systems in a Peri-Urban Forest Area (Braga Region, NW Portugal)

The Granite and Glacial Landscapes of the Peneda-Gerês National Park

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