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H. Fernandez
Department of Civil Engineering, Institute of Engineering, Research Centre for Tourism, Sustainability and Well-being (CinTurs), University of Algarve, 8005-139 Faro, Portugal

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Journal article
Published: 21 May 2021 in Sustainability
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Forest-fire rates have increased in Southern European landscapes. These fires damage forest ecosystems and alter their development. During the last few decades, an increase in fast-growing and highly fuel-bearing plant species such as bush, Eucalyptus globulus Labill., and Pinus pinaster Ait. has been observable in the interior of Portugal. This study aims to verify this assumption by the quantification of the biomass carbon sink in the forests of the Mação municipality. Maps of fire severity and forest biomass evolution after a wildfire event were produced for the period of 1991 to 2019. To quantify carbon retention in this region, this evolution was correlated with gross primary production (GPP) on the basis of satellite imagery from Landsat 5, Landsat 8, and MODIS MYD17A2H. Results show that wildfires in Mação increased in area and severity with each passing decade due to the large accumulation of biomass promoted by the abandonment of rural areas. Before the large fires of 2003, 2017, and 2019, carbon rates reached a daily maximum of 5.4, 5.3, and 4.7 gC/m2/day, respectively, showing a trend of forest-biomass accumulation in the Mação municipality.

ACS Style

Helena Fernandez; Fernando Granja-Martins; Celestina Pedras; Patrícia Fernandes; Jorge Isidoro. An Assessment of Forest Fires and CO2 Gross Primary Production from 1991 to 2019 in Mação (Portugal). Sustainability 2021, 13, 5816 .

AMA Style

Helena Fernandez, Fernando Granja-Martins, Celestina Pedras, Patrícia Fernandes, Jorge Isidoro. An Assessment of Forest Fires and CO2 Gross Primary Production from 1991 to 2019 in Mação (Portugal). Sustainability. 2021; 13 (11):5816.

Chicago/Turabian Style

Helena Fernandez; Fernando Granja-Martins; Celestina Pedras; Patrícia Fernandes; Jorge Isidoro. 2021. "An Assessment of Forest Fires and CO2 Gross Primary Production from 1991 to 2019 in Mação (Portugal)." Sustainability 13, no. 11: 5816.

Journal article
Published: 22 January 2020 in Territorium
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Atualmente, os locais escolhidos para as zonas residenciais obedecem a determinados pré-requisitos, nomeadamente, a proximidade aos locais de emprego, os bons acessos e ao aspeto paisagístico, desprezando muitas vezes a topografia do terreno, como a existência de ravinas ou linhas da água, que se traduzem em zonas de forte suscetibilidade à ocorrência de cheias, inundações e a deslizamentos de terra. Esta problemática é na sua grande maioria potenciada com a errónea intervenção humana, tornando-se urgente tomar medidas para minimizar os danos causados por estes fenómenos. Recorrendo aos Sistemas de Informação Geográfica e aos Veículos Aéreos Não Tripulados, pretende-se com este trabalho de investigação produzir elementos cartográficos que caracterizem de forma intrínseca e extrínseca os locais suscetíveis à erosão hídrica, nomeadamente os mapas, dos estados erosivos, do impacto da chuva e da suscetibilidade à erosão hídrica. A área de estudo trata-se de uma zona de ravina conhecida pelos “Caminhos de Ferro”, localizada na cidade do Luena da província de Moxico (leste de Angola). O modelo apresentado expressa uma suscetibilidade à erosão hidrica muito alta no periodo chuvoso e média no periodo seco, o que pode colocar em risco a infraestrutura do caminho de ferro que liga porto de Lobito à vila de Luau (fronteira com a Républica Democrática do Congo).

ACS Style

Helena Maria Fernandez; Fernando Miguel Granja-Martins; Emmanuel Arsénio. Aplicação das novas tecnologias para o mapeamento da suscetibilidade ao risco da ravina do "Caminho de Ferro" em Luena (Moxico, Angola). Territorium 2020, 67 -82.

AMA Style

Helena Maria Fernandez, Fernando Miguel Granja-Martins, Emmanuel Arsénio. Aplicação das novas tecnologias para o mapeamento da suscetibilidade ao risco da ravina do "Caminho de Ferro" em Luena (Moxico, Angola). Territorium. 2020; (27(I)):67-82.

Chicago/Turabian Style

Helena Maria Fernandez; Fernando Miguel Granja-Martins; Emmanuel Arsénio. 2020. "Aplicação das novas tecnologias para o mapeamento da suscetibilidade ao risco da ravina do "Caminho de Ferro" em Luena (Moxico, Angola)." Territorium , no. 27(I): 67-82.

Journal article
Published: 22 January 2020 in Territorium
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ACS Style

Helena Maria Fernandez; Fernando Miguel Granja-Martins. XII Encontro Nacional de Riscos - Risco Sísmico Aprender com o passado. Territorium 2020, 189 -192.

AMA Style

Helena Maria Fernandez, Fernando Miguel Granja-Martins. XII Encontro Nacional de Riscos - Risco Sísmico Aprender com o passado. Territorium. 2020; (27(I)):189-192.

Chicago/Turabian Style

Helena Maria Fernandez; Fernando Miguel Granja-Martins. 2020. "XII Encontro Nacional de Riscos - Risco Sísmico Aprender com o passado." Territorium , no. 27(I): 189-192.

Journal article
Published: 05 January 2020 in AgriEngineering
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There has been increasing pressure on water resources in cities due to the proliferation of urban green areas. In the Mediterranean climate, only a small part of the plants’ water needs is supplied by rainfall during the winter months. Thus, in Algarve (Portugal) irrigation of the urban landscapes is required almost all year round. The aims of this study were to evaluate the maintenance of the urban landscapes of São Brás de Alportel (Algarve) during a year, based on the characterization of the vegetation of the urban gardens, the climate data, the analysis of the irrigation systems, the calculation of the plants water requirements and the normalized difference vegetation index (NDVI). By crossing all this information, it was possible to understand if the current maintenance level is the most suitable for sustainable irrigated urban landscapes. In most of the gardens, it was possible to establish a relationship between the gross irrigation water requirements and NDVI. In general, the NDVI allowed us to study the urban landscape, through the monthly observation of the differences in the appearance and development of the vegetation.

ACS Style

Celestina M. G. Pedras; Helena Maria Fernandez; Rui Lança; Fernando Granja-Martins. Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean. AgriEngineering 2020, 2, 27 -36.

AMA Style

Celestina M. G. Pedras, Helena Maria Fernandez, Rui Lança, Fernando Granja-Martins. Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean. AgriEngineering. 2020; 2 (1):27-36.

Chicago/Turabian Style

Celestina M. G. Pedras; Helena Maria Fernandez; Rui Lança; Fernando Granja-Martins. 2020. "Applying Remote Sensing Technologies in Urban Landscapes of the Mediterranean." AgriEngineering 2, no. 1: 27-36.

Articles
Published: 04 October 2019 in Physical Geography
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The South of the Iberian Peninsula is subject to long periods of drought followed by heavy rain events over shallow soils, promoting soil loss. The Modified Fournier Index (MFI) is a good indicator of this process; however, MFI is sometimes difficult to assess due to the scarcity of rainfall data. This study proposes a methodology using MFI and supported by a geographic information system (GIS) and geostatistics to map rainfall aggressiveness with scarce spatial rainfall data, where physiographic variables are used to overcome the lack of rainfall data. The Grândola Mountain Range in the Alentejo region, Portugal, is presented as a case study. This area is a CORINE biotope, currently under application to the Natura 2000 network, and should be considered as a priority for the conservation of the environment. The model allowed us to create a map of rainfall aggressiveness, classified according to CORINE-CEC, found to be Moderate in the mountains and Low in the coastal area of the Grândola Mountain Range. This cartography is an important tool for local and national stakeholders and authorities with responsibilities in planning and protection of the territory. The methodology can be used in regions with scarce spatial rainfall data to assess areas susceptible to rainfall-induced soil erosion.

ACS Style

H. Fernandez; Fernando Martins; Jorge M. G. P. Isidoro. Mapping rainfall aggressiveness from physiographical data: application to the Grândola Mountain Range (Alentejo, Portugal). Physical Geography 2019, 41, 451 -466.

AMA Style

H. Fernandez, Fernando Martins, Jorge M. G. P. Isidoro. Mapping rainfall aggressiveness from physiographical data: application to the Grândola Mountain Range (Alentejo, Portugal). Physical Geography. 2019; 41 (5):451-466.

Chicago/Turabian Style

H. Fernandez; Fernando Martins; Jorge M. G. P. Isidoro. 2019. "Mapping rainfall aggressiveness from physiographical data: application to the Grândola Mountain Range (Alentejo, Portugal)." Physical Geography 41, no. 5: 451-466.

Journal article
Published: 18 July 2019 in 4open
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In this work we perform a geographical analysis of the Algarve region by using local parameters in the three map projections we consider: Transverse Mercator (TMzn), Lambert Azimuthal Equal-Area (LAEA) and Lambert Conformal Conic (LCC). We compare the Algarve maps resulting by each one of these representations when the origin of coordinates is moved from the center of mainland Portugal (that is in force) to the center of the Algarve. For the LCC map projection, the analysis takes also into account the change of the upper parallel from the North of Portugal to a latitude inside the Algarve border. The area and perimeter of the Algarve is computed and the location of its geographic center is determined in every map representation. Borders lengths that separates the Algarve from Alentejo and from Spain, and the extents of its South and West coasts, are also computed. We conclude by presenting the map, the values of area and perimeter and the location of the geographic center that should be considered for the Algarve, at different scales and for the available data.

ACS Style

Hermenegildo Borges De Oliveira; Fernando Granja-Martins; Helena Maria Fernandez. Map production and data analysis with local parameters. 4open 2019, 2, 27 .

AMA Style

Hermenegildo Borges De Oliveira, Fernando Granja-Martins, Helena Maria Fernandez. Map production and data analysis with local parameters. 4open. 2019; 2 ():27.

Chicago/Turabian Style

Hermenegildo Borges De Oliveira; Fernando Granja-Martins; Helena Maria Fernandez. 2019. "Map production and data analysis with local parameters." 4open 2, no. : 27.

Conference paper
Published: 01 January 2019 in Congreso Ibérico de Agroingeniería
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ACS Style

Celestina Pedras; Helena M Fernandez; Rui Lança; Fernando Miguel Granja Martins. Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo. Congreso Ibérico de Agroingeniería 2019, 1 .

AMA Style

Celestina Pedras, Helena M Fernandez, Rui Lança, Fernando Miguel Granja Martins. Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo. Congreso Ibérico de Agroingeniería. 2019; ():1.

Chicago/Turabian Style

Celestina Pedras; Helena M Fernandez; Rui Lança; Fernando Miguel Granja Martins. 2019. "Deteção remota aplicada aos espaços verdes urbanos do Mediterrâneo." Congreso Ibérico de Agroingeniería , no. : 1.

Journal article
Published: 30 March 2017 in Territorium
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O objetivo deste trabalho foi estudar o impacto da carga de combustível nas propriedades hidrológicas de um solo franco arenoso, queimado em condições de laboratório. Para tal, foram recolhidas e transportadas paralaboratório, amostras de solo não perturbado, onde foram queimadas depois de aplicar diferentes cargas de material combustível (agulhas de pinheiro). A taxa de infiltração e a sorvidade do solo diminuem fortemente com o aumento da carga de combustível. https://doi.org/10.14195/1647-7723_24_15

ACS Style

Soraia Almeida; Helena M Fernandez; Fernando Miguel Granja Martins; Celestina Pedras; Rui Lança. Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais. Territorium 2017, 213 -219.

AMA Style

Soraia Almeida, Helena M Fernandez, Fernando Miguel Granja Martins, Celestina Pedras, Rui Lança. Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais. Territorium. 2017; (24):213-219.

Chicago/Turabian Style

Soraia Almeida; Helena M Fernandez; Fernando Miguel Granja Martins; Celestina Pedras; Rui Lança. 2017. "Impacto da carga combustível nas propriedades hidráulicas de um solo pós-incêndio em condições laboratoriais." Territorium , no. 24: 213-219.

Journal article
Published: 03 November 2016 in Territorium
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O uso e a ocupação do solo, e os incêndios florestais influenciam a relação entre precipitação-escoamento superficial e, consequentemente, o regime de cheias num curso de água. Neste estudo utilizou-se o modelo Hydrologic Engineering Center - Hydrologic Modeling System para simular a resposta hidrológica da bacia hidrográfica do Rio Séqua, em cenário pré-incêndio e pós-incêndio de Catraia, Algarve, Portugal. Os resultados revelam que os caudais de ponta de cheia sofrem um incremento de 25% nas sub-bacias hidrográficas mais afetadas pelo incêndio.

ACS Style

Soraia Almeida; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Elisa Maria De Jesus Da Silva; Rui Graça-E-Costa; Rui Lança. Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua. Territorium 2016, 153 -160.

AMA Style

Soraia Almeida, Fernando Miguel Granja Martins, Helena M Fernandez, Celestina Pedras, Elisa Maria De Jesus Da Silva, Rui Graça-E-Costa, Rui Lança. Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua. Territorium. 2016; (23):153-160.

Chicago/Turabian Style

Soraia Almeida; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Elisa Maria De Jesus Da Silva; Rui Graça-E-Costa; Rui Lança. 2016. "Efeito do incêndio de Catraia no comportamento hidrológico da bacia hidrográfica do rio Séqua." Territorium , no. 23: 153-160.

Science
Published: 24 January 2016 in Journal of Maps
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Soil erosion has long been the subject of attention for environmental management researchers because it implies the loss of a key natural resource for sustaining life. Several methodologies for soil erosion assessment have been developed; many of these are supported by Geographic Information Systems. This study aims to classify the susceptibility of rainfall-induced erosion at the Serra de Grândola (Portugal), based on the Priority Actions Programme/Regional Activity Centre guidelines for mapping soil erosion on the Mediterranean coast. Results show a low-to-moderate susceptibility to rainfall-induced erosion in the lowlands, becoming moderate to high in the highlands of the Serra de Grândola.

ACS Style

Helena M. Fernandez; Fernando M. G. Martins; Jorge M. G. P. Isidoro; Lorena Zavala; Antonio Jordán. Soil erosion, Serra de Grândola (Portugal). Journal of Maps 2016, 12, 1138 -1142.

AMA Style

Helena M. Fernandez, Fernando M. G. Martins, Jorge M. G. P. Isidoro, Lorena Zavala, Antonio Jordán. Soil erosion, Serra de Grândola (Portugal). Journal of Maps. 2016; 12 (5):1138-1142.

Chicago/Turabian Style

Helena M. Fernandez; Fernando M. G. Martins; Jorge M. G. P. Isidoro; Lorena Zavala; Antonio Jordán. 2016. "Soil erosion, Serra de Grândola (Portugal)." Journal of Maps 12, no. 5: 1138-1142.

Science
Published: 28 April 2015 in Journal of Maps
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A Geographic Information Systems-based tool is used for macro-landform classification following the Hammond procedure, based upon a Digital Terrain Model (DTM) created from ordinary Kriging. Gentle slopes, surface curvature, highlands and lowlands areas are derived from the DTM. Combining this information allows the classification of terrain units (landforms). The procedure is applied to the Ria Formosa basin (Southern Portugal), with five different terrain types classified (plains, tablelands, plains with hills, open hills and hills).

ACS Style

Fernando M. G. Martins; Helena M. Fernandez; Jorge M. G. P. Isidoro; Antonio Jordán; Lorena Zavala. Classification of landforms in Southern Portugal (Ria Formosa Basin). Journal of Maps 2015, 12, 422 -430.

AMA Style

Fernando M. G. Martins, Helena M. Fernandez, Jorge M. G. P. Isidoro, Antonio Jordán, Lorena Zavala. Classification of landforms in Southern Portugal (Ria Formosa Basin). Journal of Maps. 2015; 12 (3):422-430.

Chicago/Turabian Style

Fernando M. G. Martins; Helena M. Fernandez; Jorge M. G. P. Isidoro; Antonio Jordán; Lorena Zavala. 2015. "Classification of landforms in Southern Portugal (Ria Formosa Basin)." Journal of Maps 12, no. 3: 422-430.

Book chapter
Published: 22 December 2014 in Multidimensão e territórios de risco
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ACS Style

Nuno Simoes; Helena M Fernandez; Fernando Miguel Granja Martins; Luciano Lourenço. Desenvolvimento de um WebSIG sobre investigações aplicadas a incêndios florestais. Multidimensão e territórios de risco 2014, 825 -828.

AMA Style

Nuno Simoes, Helena M Fernandez, Fernando Miguel Granja Martins, Luciano Lourenço. Desenvolvimento de um WebSIG sobre investigações aplicadas a incêndios florestais. Multidimensão e territórios de risco. 2014; ():825-828.

Chicago/Turabian Style

Nuno Simoes; Helena M Fernandez; Fernando Miguel Granja Martins; Luciano Lourenço. 2014. "Desenvolvimento de um WebSIG sobre investigações aplicadas a incêndios florestais." Multidimensão e territórios de risco , no. : 825-828.

Book chapter
Published: 22 December 2014 in Multidimensão e territórios de risco
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ACS Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Luciano Lourenço. Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve. Multidimensão e territórios de risco 2014, 327 -332.

AMA Style

Rui Lança, Vera Rocheta, Fernando Miguel Granja Martins, Helena M Fernandez, Celestina Pedras, Luciano Lourenço. Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve. Multidimensão e territórios de risco. 2014; ():327-332.

Chicago/Turabian Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Celestina Pedras; Luciano Lourenço. 2014. "Caracterização e medidas mitigadoras das inundações em Vilamoura, Algarve." Multidimensão e territórios de risco , no. : 327-332.

Book chapter
Published: 21 December 2014 in Multidimensão e territórios de risco
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ACS Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Elisa Maria De Jesus Da Silva; Celestina Pedras; Luciano Lourenço. Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais. Multidimensão e territórios de risco 2014, 715 -719.

AMA Style

Rui Lança, Vera Rocheta, Fernando Miguel Granja Martins, Helena M Fernandez, Elisa Maria De Jesus Da Silva, Celestina Pedras, Luciano Lourenço. Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais. Multidimensão e territórios de risco. 2014; ():715-719.

Chicago/Turabian Style

Rui Lança; Vera Rocheta; Fernando Miguel Granja Martins; Helena M Fernandez; Elisa Maria De Jesus Da Silva; Celestina Pedras; Luciano Lourenço. 2014. "Modificação das propriedades hidráulicas dos solos da Serra algarvia devido aos incêndios florestais." Multidimensão e territórios de risco , no. : 715-719.

Book chapter
Published: 17 August 2012 in Cartography - A Tool for Spatial Analysis
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ACS Style

Jorge M. G. P. Isidoro; Helena M. N. P. V. Fernandez; Fernando Miguel Granja Martins; Joo L. M. P. De Lim. GIS-Based Models as Tools for Environmental Issues: Applications in the South of Portugal. Cartography - A Tool for Spatial Analysis 2012, 1 .

AMA Style

Jorge M. G. P. Isidoro, Helena M. N. P. V. Fernandez, Fernando Miguel Granja Martins, Joo L. M. P. De Lim. GIS-Based Models as Tools for Environmental Issues: Applications in the South of Portugal. Cartography - A Tool for Spatial Analysis. 2012; ():1.

Chicago/Turabian Style

Jorge M. G. P. Isidoro; Helena M. N. P. V. Fernandez; Fernando Miguel Granja Martins; Joo L. M. P. De Lim. 2012. "GIS-Based Models as Tools for Environmental Issues: Applications in the South of Portugal." Cartography - A Tool for Spatial Analysis , no. : 1.