Severity of drought using rainfall indices

Teixeira, Cláudia Fernanda Almeida; Damé, Rita de Cássia Fraga; Bacelar, Luiz Carlos Salgueiro Donato; Silva, Gisele Machado da; Couto, Rosiane Schwantz do

doi:10.4136/ambi-agua.1245

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Água vol. 13 n. 1, e2119 -Taubaté 2018 the evaluated parameters, the main cause of losses in forest productivity (Gonçalves and Passos, 2000;Teixeira et al, 2013). The slope received the lowest value because it was not a climatic parameter; however it was considered due to its effect on the productivity of wood-harvesting machines (Leite et al, 2014;Malinovski et al, 2006).…”

Section: Evaluation By Multiple Criteriamentioning

confidence: 99%

Climatic zoning for eucalyptus cultivation through strategic decision analysis

Fraga¹,

Uliana²,

Silva³

et al. 2018

Rev. ambiente água

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The rapid expansion of eucalyptus cultivation necessitates studies that can identify areas amenable to the planting and development of its different varieties. This study therefore aimed to verify the suitability of two varieties of eucalyptus in the state of Espírito Santo, using Geographic Information Systems supported by strategic decision analysis. Mean precipitation, mean temperature, hydric deficit and land slope data were used as decision factors. These factors were submitted to fuzzy standardization, aggregated and compensated by the Weighted Linear Combination (WLC) process, resulting in the final aptitude mapping. For the reconciliation of conflict areas between the varieties, the Multi-objective Land Allocation (MOLA) module was used to maximize the suitability of the land for the objective. The WLC analysis allowed us to identify the suitability of the areas and with the use of the MOLA module it was possible to resolve the conflict of suitability between the two eucalyptus varieties. Most of the state of Espírito Santo is highly suitable for the the development of varieties. The northwestern region and part of the northern region presented less suitability for both analyzed eucalyptus varieties. Considering the 10,000 km 2 most adaptable area for eucalyptus cultivation in the state of Espírito Santo, it was verified that the most suitable areas for planting the two eucalyptus varieties are located in the mountainous regions, part of the southern region and near the northeastern coast.Keywords: agricultural aptitude, Espírito Santo state, fuzzy logic.Zoneamento climático para cultivo de eucalipto por meio de análise estratégica de decisão RESUMO A rápida expansão do eucalipto leva à necessidade de estudos que identifiquem áreas com aptidões climáticas para a implantação e desenvolvimento dos seus diferentes tipos de espécies. Assim sendo, este trabalho teve como objetivo verificar a aptidão de áreas para a implantação de duas espécies de eucalipto no estado do Espírito Santo, utilizando Sistemas de Informações Geográficas apoiado em análise estratégica de decisão. Na análise foram utilizados como fatores de decisão dados de precipitação média, temperatura média, déficit hídrico e declividade do estado do Espírito Santo. Estes fatores foram submetidos à padronização fuzzy, agregados e compensados pelo processo de Combinação Linear Ponderada (WLC), resultando no mapeamento final de aptidão. Para a conciliação das áreas de conflito entre as espécies utilizouse o módulo para Alocação Multi-objetiva do Terreno (MOLA), maximizando assim a adequabilidade do terreno para o objetivo. A análise WLC permitiu identificar a adequabilidade das áreas e com o uso do módulo MOLA foi possível resolver o conflito de adequabilidade entre as duas espécies de eucalipto. A maior parte do estado do Espírito Santo apresenta alta adequabilidade para o desenvolvimento das espécies, sendo a região noroeste e parte da região norte as que apresentaram menor adequabilidade para ambas as espécies de eucalipto analisadas. Co...

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Section: Evaluation By Multiple Criteriamentioning

confidence: 99%

Climatic zoning for eucalyptus cultivation through strategic decision analysis

Fraga¹,

Uliana²,

Silva³

et al. 2018

Rev. ambiente água

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“…O índice confirmou a presença na região de tendências que podem afetar negativamente o equilíbrio de água na agricultura. Teixeira et al (2013) observaram que dos 1164 meses analisados em Bagé-RS, quanto aos valores de IPP, 6,8% foram classificados como eventos de seca severa e extrema. Xu et al (2014) utilizando o IPP, identificaram que os dois eventos de secas mais severas na China ocorreram nos períodos de 1962-1963 e 2010-2011, estes afetaram a planície norte até o rio Yangtze, diminuindo, eventualmente, no sudoeste.…”

Section: Introductionunclassified

Caracterização e análise das secas na sub-bacia hidrográfica do Rio Taperoá

Farias

Sousa

2020

Rev. Bras. Geog. Fis.

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Objetivou-se identificar e analisar os períodos de secas na sub-bacia hidrográfica do Rio Taperoá (SBHRT). Dados pluviométricos, série 1963-2014, foram utilizados para analisar a severidade dos anos secos, por meio do índice padronizado de precipitação. Verificou-se que a maioria das secas que ocorreram na SBHRT se enquadram na categoria moderada, seguido por severa e extrema. A SBHRT foi atingida por secas severas e extremas durante todas as décadas analisadas, no entanto, o maior número delas ocorreu nas décadas de 1980, 1990, 2000 e 2010. A seca mais grave foi a de 1998-2000, seguido pela de 1979-1985. A seca de 2012-2014 não foi a mais grave porque a precipitação foi acima da ocorrida no período de 1998-2000 e 1979-1985, houve também maior investimento em ações de convivência com as secas e programas sociais implantados pelos governos. Characterization and analysis of droughts in sub-basin hydrographic of the Taperoá River A B S T R A C TThis study aimed to identify and analyze the periods of droughts in sub-basin hydrographic of the Taperoá River (SBHTR). Rainfall data, serie 1963-2014, were used to analyze the severity of the dry years, through the standardized precipitation index (SPI). It was found that most of droughts in SBHTR occurred into the category moderate, following by severe and extreme. The SBHTR was hit by severe and extreme dried for all analyzed decades, however, as many of them occurred in the decades of 1980, 1990, 2000 and 2010. The most severe drought was the from 1998-2000, followed by 1979-1985. The drought of 2012-2014 was not the more serious because the precipitation was above occurred in 1998-2000 and 1979-1985 period, there was also greater investment in coexistence actions with droughts and social programs implemented by governments.Keywords: category of drought, precipitation regime, severity of drought.

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“…Due to its versatility, SPI has been widely used in monitoring droughts in the Brazilian territory, as during Cantareira System reservoirs drought event in São Paulo State in 2014 (Nobre et al 2016). It was also used in Rio Grande do Sul State with a study of long-term period of rainfall to monitor the drought that affected the soybean yield (Teixeira et al 2013) and in Paraná River watershed to monitor two periods of drought, in 2000 and in 2014 (Melo et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Accessing the southeastern Brazil 2014 drought severity on the vegetation health by satellite image

2017

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Droughts are natural events that can cause water scarcity and can consequently have undesired environmental, social and political effects. Because droughts are related to land use and land cover modifications, satellite images are used to monitor and identify drought episodes through indices as Standardized Precipitation Index based on rainfall data and vegetation-based indices as Normalized Difference Vegetation Index (NDVI). Changes in vegetation cover have as impact the increasing of the land surface temperature (LST) that is a significant indicative of drought occurrence. This work explored the NDVI-LST relation through the Vegetation Health Index (VHI) in a tropical environment in Tietê River, State of São Paulo, Brazil, in order to assess changes in vegetation condition in two periods (2000 and 2014). Results showed that stressed areas are coincident with areas presenting high rate of modification in land cover; this areas presented low values of VHI and high values of LST. The worst conditions are verified in 2014, the same period of the most severe drought occurrence that reduced storage capacity in reservoirs in Tietê River.

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Severity of drought using rainfall indices

Cited by 3 publications

References 10 publications

Climatic zoning for eucalyptus cultivation through strategic decision analysis

Climatic zoning for eucalyptus cultivation through strategic decision analysis

Caracterização e análise das secas na sub-bacia hidrográfica do Rio Taperoá

Accessing the southeastern Brazil 2014 drought severity on the vegetation health by satellite image

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