scholarly journals SPECTRAL INDICES OF VEGETATION TO CAATINGA OF THE AREA OF SEMI-ARID OF RIO GRANDE OF NORTE, BRAZIL

2012 ◽  
Vol 2 (2) ◽  
pp. 10-24
Author(s):  
Joel Medeiros Bezerra ◽  
Rochele Sheila Vasconcelos ◽  
Geber Barbosa de Albuquerque Moura ◽  
José Espínola Sobrinho
Keyword(s):  
Rio Grande ◽  
Spectral Indices ◽  
Semi Arid

scholarly journals Group multicriteria model for allocating resources to combat drought in the Brazilian semi-arid region

Water Policy ◽  
2018 ◽  
Vol 20 (6) ◽  
pp. 1145-1160 ◽  
Author(s):  
Thomas Edson Espíndola Gonçalo ◽  
Danielle Costa Morais
Keyword(s):  
Water Scarcity ◽  
Arid Region ◽  
Rio Grande ◽  
Decision Makers ◽  
The Public ◽  
The World ◽  
Multicriteria Model ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Made In

AbstractThe world is facing a growing water scarcity problem in the most diverse regions. The Rio Grande do Norte (RN), a Brazilian semi-arid region, is facing its severest drought in the last 100 years. Given this context, managing water resources and combating the effects of the drought have become even more important. Decisions made in this context may involve multiple criteria established by more than one decision-maker. To tackle this issue, a multicriteria model for group decisions is proposed in order to rank the municipalities of the region and thus guide the public administration's efforts in tackling the drought and mitigating its effects. The applicability of the model is exemplified by studying the Apodi-Mossoró river basin, for which the PROMETHEE GDSS method was selected and the preferences of three decision-makers were calculated.

Concentration of Traces Metals in Underground Dams in the Semi-Arid of the Rio Grande do Norte State, Brazil: Case Study of the Sub-Basin of the Cobras River

2020 ◽  
Vol 231 (4) ◽  
Author(s):  
Alexandre de Oliveira Lima ◽  
Nildo da Silva Dias ◽  
Cleyton dos Santos Fernandes ◽  
Francisco Pinheiro Lima Filho ◽  
Rene Chipana Rivera ◽  
...  
Keyword(s):  
Rio Grande ◽  
Underground Dams ◽  
Semi Arid

Contribution a l'etude geomorphologique du nord-est du Bresil

1961 ◽  
Vol S7-III (5) ◽  
pp. 492-500
Author(s):  
Andre R. Meunier
Keyword(s):  
Rio Grande ◽  
The North ◽  
Littoral Region ◽  
Morphologic Characteristics ◽  
Western Half ◽  
Eastern Half ◽  
Semi Arid

Abstract A region of 40,000 km <sup>2</sup> in the States of Pernambuco, Paraiba, and Rio Grande do Norte in northeastern Brasil, drained to the north by the Piranhas river and to the east by the Paraiba river, exhibits a series of Cenozoic erosion levels showing the morphologic characteristics of littoral and interior zones. Rocks of the region are a poorly-known Precambrian complex attributed to the Algonkian. In the semi-arid western half of the region, west of the meridian of Campina Grande, are the Chapadas, Soledad, and Patos levels, respectively at 830-650, 600-550, and 300-250 m elevation. In the eastern half of the littoral region are the Borborema and Umbuzeiro surfaces, the probably Pliocene Tabuleiros gently sloping from 200 to 20 m at the seacoast, and the Itabaiana surface at about 90 m. These features reflect successive border flexures of the Brazilian shield, and progressive accentuation of an enormous fold at depth.

Avaliação da susceptibilidade à degradação ambiental em um município serrano do semiárido do Brasil (Cerro Corá-RN) / Evaluation of susceptibility to environmental degradation in a mountain municipality at semi-arid region of Brazil (Cerro Corá-RN)

2018 ◽  
Vol 28 (55) ◽  
pp. 880-897
Author(s):  
Henrique Roque Dantas ◽  
Jânio Carlos Fernandes Guedes ◽  
Diógenes Félix da Silva Costa ◽  
Fernando Moreira Da Silva
Keyword(s):  
Environmental Degradation ◽  
Arid Region ◽  
Satellite Images ◽  
Census Data ◽  
Decisive Role ◽  
Rio Grande ◽  
Natural Environments ◽  
Economic Practices ◽  
Semi Arid Region ◽  
Semi Arid

Os processos de ocupação e evolução dos ambientes naturais em decorrência de um processo desordenado de implementação de práticas econômicas agrosilvopastoris, desempenham um papel determinante de degradação da paisagem do semiárido Nordestino. A Serra de Santana apresenta elementos naturais importantes para o estado do Rio Grande do Norte como a nascente do Rio Potengi.  O presente trabalho teve como objetivo analisar o grau de susceptibilidade de degradação no município de Cerro Corá - RN.  Foram utilizadas imagens de satélite Landsat-5 e dados censitários referente ao ano de 2008. Como método fez-se uso da proposta de Karmieczak e Seabra (2007) que contempla uso do solo, NDVI, precipitação, pecuária e erodibilidade na avaliação da degradação ambiental. Os resultados mostraram que em a maioria do município de Cerro Corá apresenta uma susceptibilidade de baixa a média, que juntos representam 63,92% do município. Um sistema de informação Geográfica torna-se indispensável no monitoramento ambiental de Cerro Corá/RN.Palavras-chave: LANDSAT, Indicadores de degradação ambiental, Geoprocessamento, uso do solo.AbstractThe occupation processes and evolution of natural environments due to a disorderly process of implementing agrosilvopastoris economic practices, play a decisive role in degradation of the Northeastern semi-arid landscape. The Serra de Santana presents important natural elements for the state of Rio Grande do Norte as the source of the Potengi River. The present work had as objective to analyze the degree of susceptibility of degradation in the municipality of Cerro Corá - RN. Landsat-5 satellite images were used and census data for the year 2008. As a method made use of the proposed Karmieczak and Seabra (2007) which includes land use, NDVI, precipitation, livestock and erodibility in the evaluation of environmental degradation. The results showed that in most of the municipality of Cerro Cora has a low susceptibility average, which together account for 63.92% of the municipality. A geographic information system becomes indispensable in the environmental monitoring of Cerro Corá/RNKeywords: LANDSAT, Indicators of environmental degradation, Geoprocessing, Use of Soil.

On the occurrence of Cebus flavius (Schreber 1774) in the Caatinga, and the use of semi-arid environments by Cebus species in the Brazilian state of Rio Grande do Norte

Primates ◽  
2009 ◽  
Vol 50 (4) ◽  
pp. 357-362 ◽  
Author(s):  
Renata G. Ferreira ◽  
Leandro Jerusalinsky ◽  
Thiago César Farias Silva ◽  
Marcos de Souza Fialho ◽  
Alan de Araújo Roque ◽  
...  
Keyword(s):  
Rio Grande ◽  
Arid Environments ◽  
Brazilian State ◽  
Semi Arid

scholarly journals Desertificação: Questionando as Bases Conceituais, Escalas de Análise e Consequëncias

GEOgraphia ◽  
2009 ◽  
Vol 3 (6) ◽  
pp. 83
Author(s):  
Roberto Verdum, Denise Quevedo, Lisiane Zanini e Luciane Cândido
Keyword(s):  
Scientific Literature ◽  
Global Climate ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Tropical Zone ◽  
The World ◽  
Temporal Dimensions ◽  
The Right ◽  
Semi Arid ◽  
Different Time Scales

Resumo Considerando o interesse na temática da arenização no sudoeste do Rio Grande do Sul, Brasil e o estímulo à reflexão, pensa-se que é fundamental expor e discutir os critérios que estruturam o(s) conceito(s) de desertificação, através da análise de como este conceito tem sido apresentado nas pesquisas científicas, nos livros didáticos e na prática universitária. Quando se busca a compreensão da gênese e as bases que forjaram o conceito do processo denominado desertificação, procura-se o balizamento a partir de dois critérios essenciais para o estudo de qualquer processo: o espaço geográfico e o tempo de sua ocorrência. A partir da análise desses dois critérios e das alterações provocadas nas sociedades humanas percebem-se significativas diferenças nos conceitos de desertificação, assim como em relação as propostas de combatê-la. Sendo assim, inicialmente este artigo têm a intenção de incitar a reflexão no que se refere a essas diferenças, trazendo algumas bases referenciais, o uso desses conceitos em livros didáticos de maior uso na rede escolar e a produção dos alunos de pós-graduação do curso de Mestrado em Geografia da UFRGS, na disciplina denominada Desertificação: questão ambiental. Palavras chave: desertificação, arenização, ambiental.Abstract The word desertification has been repeatedly applied to southwestern Rio Grande do Sul, Brasil. This paper questions if this is the right word to use. Below, we review how this word is used in the scientific literature, textbooks and in universities. For all of Geography the meaning of a word must be provided in its both spatial and temporal dimensions. Spatially desertification has been used to arid, semi-arid, semi-wet regions. Examples of this are found in the northeast of Brazil and the Sahel in Africa. The temporal use of desertification is perhaps harder to be as precise, but has been generally used for different time scales. Examples of this are the desertification in a tropical zone of Africa, identified since 1949, the desertification in Brazil identified since 1970 and in others places of the world where the desertification is associated with the global climate change of the Quatemary Period. Key words: desertification, enviromental

scholarly journals WinSLAMM Simulation of Hydrologic Performance of Permeable Pavements—A Case Study in the Semi-Arid Lower Rio Grande Valley of South Texas, United States

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1865 ◽  
Author(s):  
Taufiqul Alam ◽  
Ahmed Mahmoud ◽  
Kim D. Jones ◽  
Juan César Bezares-Cruz ◽  
Javier Guerrero
Keyword(s):  
Rio Grande Valley ◽  
Rio Grande ◽  
Concrete Pavement ◽  
South Texas ◽  
Lower Rio Grande Valley ◽  
Permeable Pavements ◽  
Runoff Reduction ◽  
Semi Arid ◽  
Lower Rio Grande ◽  
Hydrologic Performance

This study used the Source Loading and Management Model for Windows (WinSLAMM) to develop a set of calibrated hydrologic models for three types of regional permeable pavements—porous concrete pavement (PCP), permeable interlocking concrete pavement (PICP), and interlocking block pavement with gravel (IBPG). The objective was to assess the hydrologic performance of permeable pavements, including the runoff depth, peak discharge, percentage increment in runoff reduction of pavements as a function of rainfall depth, development area, and base aggregate porosity, respectively. The permeable pavements were monitored over a wide range of rainfall events in the semi-arid Lower Rio Grande Valley of South Texas. Data regarding rainfall intensities, source characterizations, runoff coefficients, and pavement design were initialized as WinSLAMM input. Validation results showed that the calibrated models could over or under-predict runoff reduction within a 30% error range. PCP and IBPG were very effective and could be capable of handling storms as large as 50-year frequency over a 24-h time period. The modeling results showed that PCP might require a 50–60% lesser footprint area as compared to PICP and IBPG, respectively. Additionally, PCP might be able to store 30% additional runoff if the porosity of base aggregates was increased by 40%.

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