Urban expansion of Baghdad city and its impact on the formation of Thermal Island based upon Multi-Temporal Analysis of satellite images

Radiometric changes observed in multi-temporal optical satellite images have an important role in efforts to characterize selective-logging areas. The aim of this study was to analyze the multi-temporal behavior of spectral-mixture responses in satellite images in simulated selective-logging areas in the Amazon forest, considering red/near-infrared spectral relationships. Forest edges were used to infer the selective-logging infrastructure using differently oriented edges in the transition between forest and deforested areas in satellite images. TM/Landsat-5 images acquired at three dates with different solar-illumination geometries were used in this analysis. The method assumed that the radiometric responses between forest with selective-logging effects and forest edges in contact with recent clear-cuts are related. The spatial frequency attributes of red/near infrared bands for edge areas were analyzed. Analysis of dispersion diagrams showed two groups of pixels that represent selective-logging areas. The attributes for size and radiometric distance representing these two groups were related to solar-elevation angle. The results suggest that detection of timber exploitation areas is limited because of the complexity of the selective-logging radiometric response. Thus, the accuracy of detecting selective logging can be influenced by the solar-elevation angle at the time of image acquisition. We conclude that images with lower solar-elevation angles are less reliable for delineation of selecting logging.

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Monitoring and Landscape Quantification of Uncontrolled Urbanisation in Oasis Regions: The Case of Adrar City in Algeria

Contemporary Urban Affairs ◽

10.25034/ijcua.2021.v5n2-5 ◽

2021 ◽

Vol 5 (2) ◽

pp. 209-219

Author(s):

Assoule Dechaicha ◽

Adel Daikh ◽

Djamel Alkama

Keyword(s):

Landscape Metrics ◽

Satellite Images ◽

Methodological Approach ◽

Monitoring And Evaluation ◽

Temporal Analysis ◽

Multi Temporal ◽

Spatio Temporal ◽

Landsat Satellite ◽

Landscape Transformations ◽

The City

Nowadays, uncontrolled urbanisation is one of the major problems facing Algerian oasis regions. The monitoring and evaluation of its landscape transformations remain a key step for any oasis sustainability project. This study highlights the evolution of spatial growth in the city of Adrar in southern Algeria during the period 1986-2016 by establishing a Spatio-temporal mapping and landscape quantification. The methodological approach is based on a multi-temporal analysis of Landsat satellite images for 1986, 1996, 2006 and 2016, and the application of landscape metrics. The results show two opposite spatial trends: significant growth of built-up areas against an excessive loss of palm groves. The landscape metrics allowed the identification of a progressive fragmentation process characterising the palm groves. Thus, the findings of this study show the utility of satellite imagery and landscape metrics approach for monitoring urbanisation patterns and assessing their impacts on oasis ecosystems.

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MULTI-TEMPORAL ANALYSIS OF THE GLACIER RETREAT USING LANDSAT SATELLITE IMAGES IN THE NEVADO OF THE AMPAY NATIONAL SANCTUARY- PERU

Journal of Sustainable Development of Energy Water and Environment Systems ◽

10.13044/j.sdewes.d8.0380 ◽

2021 ◽

Vol N/A (N/A) ◽

pp. 0-0

Author(s):

Carolina Soto Carrión ◽

Juan José Zuñiga Negrón ◽

Jhon Paucar Ancco ◽

Wilber Jiménez Mendoza ◽

Manuel J. Ibarra Cabrera ◽

...

Keyword(s):

Satellite Images ◽

Temporal Analysis ◽

Glacier Retreat ◽

Multi Temporal ◽

Landsat Satellite

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Análise multitemporal da expansão urbana de Maringá-PR durante o período de 1947 a 2014 envolvendo o Parque Municipal do Cinquentenário e as principais áreas verdes do município / Multitemporal analysis of urban expansion Maringá – PR during (...)

Caderno de Geografia ◽

10.5752/p.2318-2962.2016v26n46p333 ◽

2016 ◽

Vol 26 (46) ◽

pp. 333

Author(s):

Felipe Gomes Rubira

Keyword(s):

Environmental Degradation ◽

Urban Expansion ◽

Temporal Analysis ◽

Population Increase ◽

Native Forest ◽

Rapid Urbanization ◽

Green Areas ◽

Multi Temporal ◽

Multitemporal Analysis ◽

The City

A hipótese desta pesquisa surge através da premissa de que a maioria das áreas verdes localizadas em municípios brasileiros acabam sendo alteradas negativamente pelo processo de expansão urbana e pelo aumento populacional. O objetivo da pesquisa é realizar uma análise multitemporal da expansão urbana relacionada com o aumento populacional de Maringá-PR que influenciaram na mudança da paisagem das áreas verdes do município, caracterizando por meio de períodos estabelecidos em décadas como foi sendo materializada a expansão da malha urbana em direção as áreas verdes. Concluiu-se que a urbanização acelerada do município começou a envolver as áreas verdes da cidade em todas as direções e os primeiros processos de degradação ambiental começaram a surgir, restando pequenas manchas de mata nativa. Verificou-se que os principais problemas ambientais do Parque Municipal do Cinquentenário coincidem com a aproximação da urbanização no entorno deles, em suas áreas limítrofes. Concluiu-se também, que a metodologia aplicada da análise multitemporal, mostrou-se eficiente quanto às avaliações temporais urbanas e ambientais, tornando-se ferramenta útil para um futuro plano de gestão ambiental dos órgãos governamentais responsáveis.Palavras-Chave: Análise multitemporal, expansão urbana, aumento populacional, degradação ambiental, áreas verdes.Abstract The hypothesis of this research comes from the premise that the majority of green areas located in municipalities end up being changed negatively by the process of urban expansion and population increase. The objective of the research is to conduct a multi-temporal analysis of urban expansion related to the population increase of Maringa-PR that influenced the landscape change from green areas of the city, featuring through periods established for decades as it was being materialized the expansion of the urban fabric toward the green areas. It was concluded that the rapid urbanization of the city began to engage the green areas of the city in all directions and the first environmental degradation processes began to emerge, leaving small patches of native forest. It was found that the main environmental problems of the Cinquantenaire Park Municipal coincide with the approach of urbanization in their environment, in their neighboring areas. It was also concluded that the methodology applied in the multi-temporal analysis, proved efficient as to urban and environmental temporal ratings, becoming a useful tool for future environmental management plan of the responsible government agencies.Keywords: Multitemporal analysis, urban expansion, population increase, environmental degradation, green áreas.

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Exposure to Geo-Hydrological Hazards of the Metropolitan Area of Genoa, Italy: A Multi-Temporal Analysis of the Bisagno Stream

Sustainability ◽

10.3390/su12031114 ◽

2020 ◽

Vol 12 (3) ◽

pp. 1114 ◽

Cited By ~ 2

Author(s):

Guido Paliaga ◽

Fabio Luino ◽

Laura Turconi ◽

Fausto Marincioni ◽

Francesco Faccini

Keyword(s):

Metropolitan Area ◽

Environmental Sustainability ◽

Urban Expansion ◽

Temporal Analysis ◽

Territorial Planning ◽

Rainfall Frequency ◽

Hazard Control ◽

Hydrological Hazards ◽

Multi Temporal ◽

Expected Benefits

Geo-hydrological risk reduction policies are becoming a critical challenge for environmental sustainability, both at the national and international levels. The reason is twofold: On the one hand, climate change has increase rainfall frequency and intensity, while on the other, reckless urban expansion has increased exposure to such hazards over time. Italy is a country that is very vulnerable to flood and landslide hazard; the city of Genoa, which, in recent decades, has been frequently hit by severe floods, has risen to symbolize Italian geo-hydrological risk. Recent studies on Genoa’s geo-hydrological hazard have focused on the analysis of hydro-geomorphological features of the Bisagno stream basin, yet their main focus was on hazard control. Very little research has been done to enhance the understanding of the source of risk in such catchments. This paper presents a study on the increased urban exposure and vulnerability to geo-hydrological hazard along the Bisagno stream catchment area over the last 200 years. Morphometric analyses were coupled with historical documents showing the evolution of the urban layout in this area. The results show that the “Bisagno Master Plan”, a territorial planning strategy aimed at reducing geo-hydrological hazard and risk, has not produced the expected benefits. In spite of the plan, critical changes in land use and the hydrographic network, along with uncontrolled anthropization of the Genoa metropolitan area, has continued over the last two decades.

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Investigação de Ilhas de Calor em Brasília: Análise Multitemporal com Enfoque na Cobertura do Solo (Investigation of Heat Islands in Brasilia: Multi-Temporal Analysis with Focus on Land Cover)

Revista Brasileira de Geografia Física ◽

10.26848/rbgf.v7.6.p1044-1054 ◽

2015 ◽

Vol 7 (6) ◽

pp. 1044

Author(s):

Nickolas Castro Santana

Keyword(s):

Urban Areas ◽

Urban Expansion ◽

Urban Climate ◽

Temporal Analysis ◽

Climate Impacts ◽

City Center ◽

Heat Islands ◽

Multi Temporal ◽

Basic Characteristics ◽

The City

As questões relacionadas com o clima urbano tem se intensificado a partir da crescente urbanização imposta pelo sistema de desenvolvimento vigente. Um dos problemas gerados são as Ilhas de Calor, um aquecimento da superfície que tende a se formar em centros de cidades onde há intensa urbanização, sendo que a cidade de Brasília possuí as características básicas para a formação das mesmas. Para detectar a formação das ilhas de calor em Brasília foram utilizadas quatro imagens termais do satélite Landsat – 5, de 1987 á 2011. A partir da análise dos mapas de temperatura superficial foi possível perceber o constante aumento das temperaturas e abrangência das ilhas de calor em Brasília, fato este influenciado pela expansão urbana e intensificação do uso urbano, outro grande foco de calor foram as áreas de solo exposto que se apresentaram em certos casos com temperaturas maiores até mesmo que o centro da cidade, percebe-se portanto a necessidade de uma melhor gestão e planejamento das áreas urbanas para minimizar os impactos climáticos que tendem a se tornar cada vez mais significativos. A B S T R A C T Issues related to urban climate has intensified from increasing urbanization imposed by the current development system. One of the problems generated are the heat islands, a warming of the surface that tends to form in city centers where there is intense urbanization, and the city of Brasilia possess the basic characteristics for forming the same. To detect the formation of heat islands in Brasilia the research used four thermal images of Landsat - 5, 1987 to 2011. Based on the analysis of the maps of temperature was possible to perceive the rising temperatures and breadth of heat islands in Brasilia, this fact influenced by urban expansion and intensification of urban use, another major focus of heat were the areas of exposed soil that performed in some cases with even higher temperatures than the city center, so realizes the need for better management and planning of urban areas to minimize climate impacts that are likely to become increasingly significant. Keywords: Heat Islands; Thermal Sensor; Brasília; Land Use;

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ANÁLISE DA EVOLUÇÃO TEMPORAL E DA DINÂMICA SEDIMENTAR DA DUNA DO PÔR DO SOL, JERICOACOARA, CEARÁ – BRASIL

Revista da Casa da Geografia de Sobral (RCGS) ◽

10.35701/rcgs.v21n2.562 ◽

2019 ◽

Vol 21 (2) ◽

pp. 656-673

Author(s):

Adely Pereira Silveira ◽

Fábio Perdigão Vasconcelos ◽

Vanda Carneiro de Claudino Sales

Keyword(s):

Coastal Zone ◽

Satellite Images ◽

Temporal Analysis ◽

Coastal Dynamics ◽

The Public ◽

Public Managers ◽

Mobile Dunes ◽

The Waves ◽

Adequate Management

No presente trabalho voltamos nossa atenção para as dunas móveis que são interfaces litorâneas, áreas continuamente modeladas pelas ações dos ventos e das ondas, importantes reservatórios de sedimentos que atuam na manutenção do fluxo sedimentar da faixa praial. Partindo deste universo, concentramos nossos estudos na Praia de Jericoacoara, município de Jijoca de Jericoacoara-CE, tendo como objetivo analisar a dinâmica morfossedimentar da Duna do Pôr do Sol na Praia de Jericoacoara, a partir da análise temporal de imagens de satélites; realização de perfis de praia, cálculo do grau de declividade da face de avalanche da duna, da área e do volume sedimentar da duna; e da observação da evolução dos tipos de uso e de ocupação. Os resultados desta pesquisa possibilitaram a elaboração de diagnósticos e prognósticos evolutivos para a área estudada, fornecendo dados e informações que podem vir a subsidiar os gestores públicos na gestão adequada da zona costeira e na compreensão dos riscos ambientais.Palavras-chave: Dinâmica Costeira; Duna; Jericoacoara/CE. ABSTRACTIn the present work we turn our attention to the mobile dunes that are coastal interfaces and represent areas continuously modeled by the action of the winds and the waves, important reservoirs of sediments for the maintenance of the sedimentary flow of the praial band. Starting from this universe, we concentrated our studies in the Beach of Jericoacoara, municipality of Jijoca of Jericoacoara-CE, aiming to analyze the morphosedimentary dynamics of the Dune of the Sunset on the Beach of Jericoacoara, based on the temporal analysis of satellite images; the realization of beach profiles, the calculation of the degree of slope of the slip face, the area and the sedimentary volume of the dune; and the observation of the evolution of types of use and occupation. The results of this research enabled the elaboration of diagnoses and evolutionary prognoses for the studied area, providing data and information that can subsidize the public managers in the adequate management of the coastal zone and in the understanding of the environmental risks.Keywords: Coastal Dynamics; Dune; Jericoacoara / CE. RESUMENEn el presente trabajo dirigimos nuestra atención a las dunas móviles que son interfaces costeras, áreas continuamente modeladas por las acciones de vientos y olas, importantes depósitos de sedimentos que actúan para mantener el flujo sedimentario de la playa. Desde este universo, enfocamos nuestros estudios en Jericoacoara Beach, Jijoca de Jericoacoara-CE, con el objetivo de analizar la dinámica morfosedimentaria de Sunset Dune en Jericoacoara Beach, a partir del análisis temporal de imágenes de satélite; haciendo perfiles de playa, calculando la pendiente de la cara de avalancha de dunas, el área y el volumen sedimentario de la duna; y observando la evolución de los tipos de uso y ocupación. Los resultados de esta investigación permitieron la elaboración de diagnósticos y pronósticos evolutivos para el área estudiada, proporcionando datos e información que pueden ayudar a los administradores públicos en el manejo adecuado de la zona costera y en la comprensión de los riesgos ambientales.Palabras clave: Dinámica costera; Duna; Jericoacoara / CE.

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