scholarly journals Spatio-temporal environmental characterization of the Pontal River Basin in the State of Pernambuco

2019 ◽  
Vol 11 (1) ◽  
pp. 34-45
Author(s):  
Iug LOPES ◽  
Clovis Manoel Carvalho RAMOS ◽  
Brauliro Gonçalves LEAL ◽  
Douglas Alberto de Oliveira SILVA
Keyword(s):  
River Basin ◽  
The State ◽  
Thematic Mapper ◽  
Landsat Thematic Mapper ◽  
Environmental Characterization ◽  
Spatio Temporal

As zonas rurais e urbanas estão passando por transformações do uso do solo de forma significativa. Estas mudanças têm afetado o uso da terra, principalmente nas áreas marginas às urbanas. É ao longo destas áreas onde o processo de expansão urbana entra em conflito com o uso da terra para fins agrícolas. Um recurso inestimável neste contexto é o sensoriamento remoto, que aparece como uma ferramenta de avaliação dos processos de transformação territórial. Técnicas de observação de dados adquiridos por satélites em variação temporal e espacial possuem potencial de detectar, identificar e mapear as mudanças no uso da terra. O objetivo do trabalho foi realizar uma caracterização atual do uso da terra e análise espaço-temporal das modificações ao longo dos períodos de 2000 a 2010, 2010 a 2015 e 2000 a 2015, na Bacia do Rio Pontal, usando dados Landsat Thematic Mapper (TM). De acordo com os resultados obtidos, pode-se concluir que na região estudada houve um crescimento considerável de área destinada à agricultura irrigada, redução das áreas de caatinga densa ou substituição da mesma por caatinga aberta e solo exposto e por fim se observou a redução dos corpos hídricos da região.

scholarly journals Characterization of Snow and Ice Reflectance Zones On Glaciers Using Landsat Thematic Mapper Data

1987 ◽  
Vol 9 ◽  
pp. 104-108 ◽  
Author(s):  
D.K. Hall ◽  
J.P. Ormsby ◽  
R.A. Bindschadler ◽  
H. Siddalingaiah
Keyword(s):  
Surface Temperature ◽  
Area Ratio ◽  
Thematic Mapper ◽  
Landsat Thematic Mapper ◽  
Ablation Area ◽  
Thematic Mapper Data ◽  
Glacier System ◽  
Accumulation Area Ratio ◽  
Snow And Ice

Landsat Thematic Mapper (TM) data have been analyzed to study the reflectivity characteristics of three glaciers: the Grossglockner mountain group of glaciers in Austria and the McCall and Meares Glaciers in Alaska, USA. The ratio of TM band 4 (0.76–0.90 μm) to TM band 5 (1.55–1.75 μm) was found to be useful for enhancing reflectivity differences on the glaciers. Using this ratio, distinct zones of similar reflectivity were noted on the Grossglockner mountain group of glaciers and on the Meares Glacier; no distinct zones were observed on the McCall Glacier. On the TM subscene containing the Grossglockner mountain group of glaciers, 28.2% of the glacierized area was determined to be in the zone corresponding most closely to the ablation area, and 71.8% with the location of the accumulation area. Using these measurements, the glacier system has an accumulation area ratio (AAR) of approximately 0.72. Within the accumulation area, two zones of different reflectivity were delineated. Radiometric surface temperatures were measured using TM band 6 (10.4–12.5 μm) on the Grossglockner mountain group of glaciers and on the Meares Glacier. The average radiometric surface temperature of the Grossglockner mountain group of glaciers decreased from 0.9 ± 0.34 °C in the ablation area, to −0.9 ± 0.83 C in the accumulation area.

Characterization of lava-flow degradation in the Pisgah and Cima volcanic fields, California, using Landsat Thematic Mapper and AIRSAR data

1993 ◽  
Vol 105 (2) ◽  
pp. 175-188 ◽  
Author(s):  
R. E. ARVIDSON ◽  
M. K. SHEPARD ◽  
E. A. GUINNESS ◽  
S. B. PETROY ◽  
J. J. PLAUT ◽  
...  
Keyword(s):  
Lava Flow ◽  
Thematic Mapper ◽  
Landsat Thematic Mapper ◽  
Volcanic Fields

scholarly journals Socioeconomic events linked with artisan activity in Mexico: a proposal for historical-geographical periodization

2018 ◽  
pp. 43-62
Author(s):  
Olga Correa Miranda ◽  
Enrique Propin Frejomil ◽  
Jesús Abraham Navarro Moreno
Keyword(s):  
Social Development ◽  
The State ◽  
Geographical Perspective ◽  
Spatio Temporal ◽  
Commercial Opportunity ◽  
The Way

En México, las investigaciones desde una perspectiva histórico-geográfica que hacen referencia a la economía artesanal y que contribuyen a potenciar y valorar a las artesanías en todas sus dimensiones, son escasas. En este sentido, la presente investigación, conforma una plataforma cognoscitiva que busca evidenciar acontecimientos temporales y territoriales relevantes que dieron pauta a la actual configuración territorial de la actividad artesanal del país, referentes que ponen a la luz los nichos de oportunidad productiva y comercial para generar desarrollo económico y social en pro de los artesanos. En un primer momento, se exponen las posturas metodológicas, base para la reconstrucción espacio-temporal; posteriormente, se efectúa la caracterización de este tipo de economía, mediante el reconocimiento de etapas geo-históricas que evidencian cambios en la forma de producción y comercialización así como de la manera de conceptualizar lo que son los objetos artesanales, principales problemáticas del sector y tipos de apoyo brindados por el Estado. In Mexico, the investigations from a historical-geographical perspective that make reference to the artisanal economy and that contribute to enhance and value crafts in all their dimensions, are scarce. In this sense, the present research forms a cognitive platform that seeks to highlight relevant temporal and territorial events that gave shape to the current territorial configuration of the artisanal activity of the country, references that bring to light the niches of productive and commercial opportunity to generate economic and social development in favor of artisans. At first, the methodological positions are exposed, the basis for the spatio - temporal reconstruction; Afterwards, the characterization of this type of economy is carried out, through the re cognition of stages that show changes in the way of production and commercialization as well as in the way of conceptualizing what artisan objects are, the main problems of the sector and types of support provided by the State.

scholarly journals Characterization of Snow and Ice Reflectance Zones On Glaciers Using Landsat Thematic Mapper Data

1987 ◽  
Vol 9 ◽  
pp. 104-108 ◽  
Author(s):  
D.K. Hall ◽  
J.P. Ormsby ◽  
R.A. Bindschadler ◽  
H. Siddalingaiah
Keyword(s):  
Surface Temperature ◽  
Area Ratio ◽  
Thematic Mapper ◽  
Landsat Thematic Mapper ◽  
Ablation Area ◽  
Thematic Mapper Data ◽  
Glacier System ◽  
Accumulation Area Ratio ◽  
Snow And Ice

Landsat Thematic Mapper (TM) data have been analyzed to study the reflectivity characteristics of three glaciers: the Grossglockner mountain group of glaciers in Austria and the McCall and Meares Glaciers in Alaska, USA. The ratio of TM band 4 (0.76–0.90 μm) to TM band 5 (1.55–1.75 μm) was found to be useful for enhancing reflectivity differences on the glaciers. Using this ratio, distinct zones of similar reflectivity were noted on the Grossglockner mountain group of glaciers and on the Meares Glacier; no distinct zones were observed on the McCall Glacier. On the TM subscene containing the Grossglockner mountain group of glaciers, 28.2% of the glacierized area was determined to be in the zone corresponding most closely to the ablation area, and 71.8% with the location of the accumulation area. Using these measurements, the glacier system has an accumulation area ratio (AAR) of approximately 0.72. Within the accumulation area, two zones of different reflectivity were delineated. Radiometric surface temperatures were measured using TM band 6 (10.4–12.5 μm) on the Grossglockner mountain group of glaciers and on the Meares Glacier. The average radiometric surface temperature of the Grossglockner mountain group of glaciers decreased from 0.9 ± 0.34 °C in the ablation area, to −0.9 ± 0.83 C in the accumulation area.

Environmental characterization of a semiarid hyper saline system based on dissolved trace metal-macronutrient synergy: A multivariate spatio-temporal approach

2018 ◽  
Vol 129 (2) ◽  
pp. 846-858 ◽  
Author(s):  
Turki Al-Said ◽  
Rakhesh Madhusoodhanan ◽  
Tanuspong Pokavanich ◽  
Faiza Al-Yamani ◽  
Raziya Kedila ◽  
...  
Keyword(s):  
Trace Metal ◽  
Environmental Characterization ◽  
Spatio Temporal
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