scholarly journals RISCO DE INCÊNDIOS NA ESTAÇÃO ECOLÓGICA DO TAIM, RIO GRANDE DO SUL

Nativa ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 112
Author(s):  
Juliana Marchesan ◽  
Elisiane Alba ◽  
Cristina Tabarelli ◽  
Eliziane Pivoto Mello ◽  
Dionatas Henrique Honnef ◽  
...  
Keyword(s):  
Land Use ◽  
Central Region ◽  
Fire Risk ◽  
Rio Grande ◽  
Landsat 8 ◽  
Rio Grande Do Sul ◽  
Risk Class ◽  
Radar Images ◽  
In Fire ◽  
Dynamic Variables

O objetivo deste trabalho foi realizar o mapeamento das áreas suscetíveis a ocorrência de incêndios na Estação Ecológica do Taim, Rio Grande do Sul. Para a obtenção das variáveis estáticas e dinâmicas, foram utilizadas imagens do satélite Landsat 8 e imagens de Radar para a determinação da topografia da área de estudo. Como variáveis dinâmicas utilizou-se a precipitação, temperatura e uso e cobertura da terra, enquanto que variáveis estáticas foram a hipsometria, declividade e distância das estradas. Cada variável foi estratificada e posteriormente ponderada numericamente quanto a sua suscetibilidade a ocorrência a incêndio. As variáveis dinâmicas e estáticas geradas foram integradas utilizando uma equação ponderada resultando no risco de incêndios para a área de estudo. A região central da Estação Ecológica do Taim apresentou maior suscetibilidade a incêndios, englobando a classe de alto risco, totalizando 4.219,56 ha (41,61%), enquanto as regiões periféricas apresentaram risco muito baixo a ocorrência de incêndios, abrangendo 5.419,35 ha (53,44%). As variáveis de maior contribuição à ocorrência de incêndios corresponderam ao uso e cobertura da terra e a temperatura, sendo as áreas de maior risco localizadas na parte central e próximo às estradas, nas quais estão ocupadas por campo nativo. Assim, esses locais devem ter maior atenção e recursos para combate de possíveis incêndios.Palavras-chave: Landsat 8; variáveis dinâmicas e estáticas; geoprocessamento. FIRE RISK AT THE ECOLOGIAL STATION OF TAIM, RIO GRANDE DO SUL ABSTRACT: The objective of this work was to map the areas susceptible to the occurrence of fires at the Taim Ecological Station, Rio Grande do Sul. In order to obtain the static and dynamic variables, Landsat 8 satellite images and Radar images were used to determine the topography of the study area. As dynamic variables were used the precipitation, temperature and land use and coverage, while static variables were hypsometry, slope and distance of roads. Each variable was stratified and numerically weighted as to its susceptibility to fire occurrence. The dynamic and static variables generated were integrated using a weighted equation resulting in fire risk for the study area. The central region of the Taim Ecological Station presented higher susceptibility to fires, encompassing the high risk class, totaling 4,219.56 ha (41.61%), while the peripheral regions had a very low risk of occurrence of fires, covering 5,419.35 ha (53.44%). The variables of greatest contribution to the occurrence of fires corresponded to the land use and land cover and the temperature, being the areas of greater risk in the central region and near the roads, in which they are occupied by the native field. Thus, these sites should have greater attention and resources to combat possible fires.Keywords: Landsat 8; dynamic and static variables; geoprocessing.

scholarly journals Clinical, pathological and epidemiological aspects of outbreaks of bluetongue disease in sheep in the central region of Rio Grande do Sul

2017 ◽  
Vol 37 (12) ◽  
pp. 1443-1452
Author(s):  
Ronaldo M. Bianchi ◽  
Welden Panziera ◽  
Tatiane C. Faccin ◽  
Gisane L. de Almeida ◽  
Juliana F. Cargnelutti ◽  
...  
Keyword(s):  
Central Region ◽  
Striated Muscle ◽  
Clinical Signs ◽  
Rio Grande ◽  
Nasal Discharge ◽  
Rio Grande Do Sul ◽  
Sample Collection ◽  
Area At Risk ◽  
Tissue Samples ◽  
Facial Swelling

ABSTRACT: This article describes the clinical, pathological and epidemiological aspects of 17 outbreaks of bluetongue (BT) disease in sheep occurring between December 2014 and July 2015 in the central region of Rio Grande do Sul state (RS), southern Brazil. Affected farms were visited for clinical examination, necropsy, sample collection and epidemiological investigation. The outbreaks were seasonal and occurred during the summer and autumn. A total of 180 sheep (20.4%) out of 884 in 17 small herds were affected. All ages of Texel and mixed breed sheep were affected. However, lambs (younger than one year) had higher morbidity than adult sheep. The most frequent clinical signs were anorexia, lethargy, loss of body condition, facial swelling mainly involving the lips, and greenish seromucous or mucous nasal discharge. Pulmonary lesions characterized by edema were the most prevalent findings; however, erosive and ulcerative lesions in the upper gastrointestinal tract, as well as cardiac, skeletal muscle and esophageal striated muscle necrosis, and hemorrhage in the pulmonary artery were also frequent. The bluetongue virus (BTV) genome was detected by RT-PCR in blood and tissue samples (spleen and lungs) of 21 animals from 17 outbreaks. The virus involved in the outbreak 3 was subsequently isolated and shown to belong to serotype 17, for the first time reported in Brazil. In summary, our data support the BTV genotype 17 as the etiological agent of the outbreaks and indicate that the central region of RS is an area at risk for BT in sheep, a disease previously not recognized in the region.

scholarly journals Temporal dynamics of land use and cover in Paurá Lagoon region, Middle Coast of Rio Grande do Sul (RS), Brazil

2018 ◽  
Vol 18 (1) ◽  
pp. 25-39
Author(s):  
Katia Helena Lipp-Nissinen ◽  
Bruna de Sá Piñeiro ◽  
Letícia Sebastião Miranda ◽  
Alexandre de Paula Alves
Keyword(s):  
Land Use ◽  
Temporal Dynamics ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Land Use And Cover

scholarly journals Variação de atributos do solo ao longo de três topossequências no planalto do Rio Grande do Sul (Variation of soil attribute along of three toposequence in the Rio Grande do Sul plateau)

2017 ◽  
Vol 10 (5) ◽  
pp. 1435
Author(s):  
Viviane Capoane ◽  
Tales Tiecher ◽  
Danilo Rheinheimer dos Santos
Keyword(s):  
Land Use ◽  
Soil Properties ◽  
Soil Profile ◽  
Rio Grande ◽  
P Availability ◽  
Rio Grande Do Sul ◽  
Organic C ◽  
Topographic Position ◽  
Natural Grasslands ◽  
Total P

Este trabalho investigou os efeitos da topografia e das práticas de uso e manejo do solo na variabilidade de alguns atributos do solo ao longo de três topossequências localizadas no planalto do Rio Grande do Sul. As topossequências (Tps) estão inseridas em uma bacia hidrográfica situada no município de Júlio de Castilhos. Na Tp1 foram definidos quatro pontos de amostragem e na Tp2 e Tp3, cinco pontos. Em cada perfil foram coletadas amostras em 5 camadas de solo (0‒5, 5‒10, 10‒20, 20‒40 e 40‒60 cm). Em laboratório foram determinados os atributos: densidade, argila, pH em água, carbono (C) orgânico total, fósforo (P) total, P orgânico total, P disponível, óxidos de ferro (Fe) e alumínio (Al) cristalinos e amorfos. Os resultados encontrados mostram que o movimento de sedimentos em superfície e através do perfil do solo é controlado pela posição, forma e declividade da encosta e, pelas atividades antrópicas como o uso e manejo do solo e aplicação de fertilizantes. Considerando as classes de uso da terra, os maiores teores de C e P (total, orgânico e disponível) foram obtidos na área úmida, seguido da lavoura e campo nativo. Considerando a posição na encosta os teores de C e P foram maiores na baixada seguido da base da encosta, topo e meia encosta. A condição hidromórfica ao longo das topossequências desempenhou um papel importante na disponibilidade de P, acúmulo C orgânico total e solubilização dos óxidos de Fe e Al. A B ST R A C TThis work investigated the effects of topography and land use and soil management practices on the variability of some soil properties along three toposequences located in the Rio Grande do Sul plateau, Southern Brazil. The toposequences (Tps) evaluated are from a watershed located in the municipality of Júlio de Castilhos. Soil samples were taken in four points in Tp1 and in five points in Tp2 and Tp3. In each point samples were taken at five depths (0‒5, 5‒10, 10‒20, 20‒40, and 40‒60 cm). The soil properties evaluated were soil density, clay, pH in water, total organic carbon (C), total phosphorus (P), total organic P, available P, and amorphous and crystalline iron (Fe) and aluminum (Al) oxides. Results show that the transport of sediments on the surface and through the soil profile is controlled by topographic position, landform, slope, and also by the anthropic activities such as the use and management of the soil and the application of fertilizers. Considering the classes of land use, the highest levels of C and P (total, organic and available) were obtained in the wetlands, followed by the crop fields and natural grasslands. Considering the topographic position, the contents of C and P were higher in the floodplain followed by the base of the slope, top and middle slope. Hydromorphic conditions along the toposequences played an important role in P availability, total organic C accumulation and solubilization of Fe and Al oxides.keywords: Land use, topographic position, soil profile, soil properties. 

Recognizing Different Lifeways and Subsistence Practices through Analysis of the Material Cultures of Mound Sites in Rio Grande do Sul, Brazil

2020 ◽  
Vol 31 (2) ◽  
pp. 308-324
Author(s):  
Anderson Marques Garcia
Keyword(s):  
Central Region ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Hunter Gatherers ◽  
Patos Lagoon ◽  
Projectile Points ◽  
Brazilian State ◽  
Subsistence Practices ◽  
Mound Sites

In the Brazilian state of Rio Grande do Sul, the term cerrito was traditionally used to designate archaeological phenomena that emerge in the form of mounds in different landscapes. Except for recent research developed in the southwestern region of the Patos Lagoon, few advances have occurred since the 1980s in the study of cerritos in Brazil. This article presents an analysis of the lithic industries of sites with mounds in the southwestern region of the Patos Lagoon and in the central region in the current territory of Rio Grande do Sul. The results, along with other data from the sites, suggest that coastal sites were occupied by sedentary fisher-hunter-gatherers, who also possibly domesticated certain plants. Lithic material was scarce there and was mainly produced from pebbles and quartz cobbles using the anvil technique. In contrast, central region formations presented mounds on outcrops, using land, pebbles, and boulders; the area was occupied by a hunter-gatherer group that had projectile points and other instruments carved mainly by façonnage and débitage.

Aegla manuinflata, a new species of freshwater anomuran (Decapoda: Anomura: Aeglidae) from Brazil, determined by morphological and molecular characters

Zootaxa ◽  
2009 ◽  
Vol 2088 (1) ◽  
pp. 31-40 ◽  
Author(s):  
SANDRO SANTOS ◽  
GEORGINA BOND-BUCKUP ◽  
MARCOS PÉREZ-LOSADA ◽  
MARLISE LADVOCAT BARTHOLOMEI-SANTOS ◽  
LUDWIG BUCKUP
Keyword(s):  
New Species ◽  
Central Region ◽  
Mitochondrial Gene ◽  
Rio Grande ◽  
Sister Group ◽  
Rio Grande Do Sul ◽  
High Degree ◽  
Uruguay River ◽  
A New Species ◽  
Molecular Characters

A new species of freshwater anomuran, Aegla manuinflata n. sp. (Decapoda: Anomura: Aeglidae), is described from the Ibicuí River basin, a tributary of the Uruguay River, from the central region of the state of Rio Grande do Sul, Brazil. It can be distinguished from its congeners based on both morphological and molecular (mitochondrial gene — COII) evidence. Morphologically, the new species partly resembles A. inermis and A. uruguayana, but differs in having an inflated cheliped propodus and more elongated dactyls, besides other features. Our molecular results showed a high degree of genetic divergence between A. manuinflata and its sister group (composed of A. singularis, A. uruguayana, A. rossiana and A. platensis), an indication of species distinctness within the Aeglidae.

scholarly journals Balantidium coli in Pigs of Distinct Animal Husbandry Categories and Different Hygienic-Sanitary Standards in the Central Region of Rio Grande do Sul State, Brazil

2017 ◽  
Vol 45 (1) ◽  
pp. 6 ◽  
Author(s):  
Luís Antonio Sangioni ◽  
Sônia De Avila Botton ◽  
Fernanda Ramos ◽  
Gustavo Cauduro Cadore ◽  
Silvia Gonzales Monteiro ◽  
...  
Keyword(s):  
Central Region ◽  
Intestinal Parasites ◽  
Physiological State ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Natural Reservoir ◽  
Swine Farms ◽  
Balantidium Coli ◽  
Significant Difference ◽  
Stool Samples

Background: Balantidium coli is a commensal protozoan that infects several animals, but it has pigs as its natural reservoir. In the presence of predisposing factors, B. coli can become pathogenic for swine, causing enteric lesions. Infections determined by this protozoan may be a risk to public health, due to dysentery in animal keepers and veterinarians. This study aimed to determine the occurrence of infection by B. coli in pigs of distinct husbandry categories, as well as unlike physiological state, kept in farms with different hygienic-sanitary standards, located in the central region of Rio Grande do Sul State in Brazil.Materials, Methods & Results: Stool samples were collected from 12 different farms with different hygienic-sanitary standards being four farms of finisher pigs (G1; n = 287), four farms with pregnant females (G2; n = 60) and four farms with lactation sows (G3;  n = 40), and all samples were submitted to coproparasitological analyses to verify the presence of cysts or trophozoites of B. coli. The infection levels were considered mild (1-100 cyst/trophozoite), moderate (101300 cyst/trophozoite) and high (>300 cysts/trophozoite). In addition, information about hygienic-sanitary conditions of each farm was collected. The occurrence of B. coli infection in all swine stool samples analyzed was 60.9% (236/387); however, in G1, G2 and G3 was 54.7% (157/287), 91.7% (55/60) and 65% (26/40) respectively. There was significant difference in the occurrence of G1 (P < 0.05) except between farms B and C (67.9% and 56.6% respectively). There was also a significant difference (P < 0.05) between the occurrence of B. coli found in G2 and G3. The infection levels were considered predominantly mild in G1; and mild to moderate in G2 and G3.Discussion: In this research it was confirmed the presence of B. coli in swine farms located in the central region of Rio Grande do Sul State in Brazil. This area is known as being an important producer of pigs in Brazil. The results obtained in this study, demonstrated that swine farms with better hygienic and sanitary standards, had mild infections by B. coli. However, the presence of intestinal parasites, especially protozoa, can occur even in properties with good management practices. However, protozoa infections can cause important production losses, especially when associated with other pathogens or nutritional problems. The occurrence of B. coli observed in pregnant (G2) and lactating (G3) females was significant, and the infection level was mild to moderate. These conditions suggest that pregnancy, childbirth and lactation are critical stages for females, mainly due to physiological stress, resulting in a change in the hormonal levels and immune status of the animals. Thus, these factors cause declines in the immune response of pigs making them susceptible to infections and the increase of cyst excretion of B. coli in feces. The abundance of protozoan cysts in feces contaminates the environment and increases the risk of infections in humans. In addition, it was demonstrated the occurrence of B. coli in an important site of swine production in RS, Brazil. B. coli is related to the physiological state of the animals and the hygienic and sanitary management in different categories of swine. In conclusion, this study highlights the epidemiological importance of swine as natural reservoir of Balantidium coli and the risk potential of infection to animals and humans. Additionally, sanitary program in farming pigs must be improved in order to guarantee healthy and food-safe product for consumers.

scholarly journals Estudo sistemático da família Cichlidae na região central do Rio Grande do Sul. I Gêneros: Aequidens, Chichlaurus e Geophagus

1981 ◽  
Vol 3 (3) ◽  
pp. 65
Author(s):  
Maria Lacy Cezimbra Weis ◽  
Ilca Marion Knewitz Bossemeyer ◽  
Horst Oscar Lippold
Keyword(s):  
Central Region ◽  
Rio Grande ◽  
The State ◽  
Rio Grande Do Sul ◽  
Geophagus Brasiliensis ◽  
Aequidens Portalegrensis

Among the specimens of the Cichlidae family collected in the central region of the State of Rio Grande do Sul (Brazil), the initial studies were done in genera represented by orbicular forms, which comprise: Aequidens, Cichlaurus and Geophagus. Of these genera, four species were found in different proportions: Aequidens portalegrensis, Cichlaurus facetus, Geophagus brasiliensis and Geophagus gymnogenys.

scholarly journals Relação entre as variáveis Geomorfométricas e a Vegetação Florestal na Bacia Hidrográfica do Arroio Caverá - Oeste do RS

2015 ◽  
Vol 29 ◽  
pp. 246 ◽  
Author(s):  
Paula Mirela Almeida Guadagnin ◽  
Romario Trentin ◽  
Fabiano Da Silva Alves
Keyword(s):  
Rio Grande ◽  
Shuttle Radar Topography Mission ◽  
Landsat 8 ◽  
Rio Grande Do Sul ◽  
Campos Sulinos

A vegetação na região oeste do Estado do Rio Grande do Sul apresenta como principal característica fisionômica a predominância da formação campestre com relação à vegetação florestal, porém alguns autores esclarecem que os campos sulinos devem ser interpretados como “formações relictuais” em relação às florestas no atual clima ombrófilo. O “avanço” da vegetação florestal sobre a original predominância campestre no oeste do Estado pode ser associado também às variações topográficas do terreno e à dinâmica da água no solo. Entretanto, são raros os estudos detalhados que fazem a relação entre estes elementos da paisagem, com a utilização de informações espacializadas. Este trabalho busca demonstrar a relação existente entre a distribuição das tipologias de vegetação florestal e as formas componentes das encostas na bacia hidrográfica do arroio Caverá (BHAC), utilizando para tal, variáveis geomorfométricas extraídas de dados SRTM (Shuttle Radar Topography Mission) e mapa de vegetação gerado através do SIG ArcGIS 10.1 (ESRI, 2013), com o uso de imagens Landsat 8 Sensor OLI (Operational Land Imager). A partir dos parâmetros altitude, declividade, perfil e plano de curvatura, foram identificadas e descritas 12 unidades geomorfométricas para a bacia. A vegetação florestal na BHAC apresenta-se em duas tipologias: matas ciliares e capões-de-mato/ matas de encosta.

scholarly journals Licenciamento ambiental do uso do fogo nos Campos de Cima da Serra, Rio Grande do Sul, Brasil: Determinação do período de pousio e sugestões para uma rotina de monitoramento.

2018 ◽  
Vol 4 (3) ◽  
pp. 447-469
Author(s):  
Iuri BUFFON ◽  
Rodrigo Cambará PRINTES ◽  
Clódis de Oliveira ANDRADES-FILHO
Keyword(s):  
Rio Grande ◽  
Landsat 8 ◽  
Rio Grande Do Sul ◽  
Mata Atlântica ◽  
Mata Atlantica

A proibição do uso do fogo pelo Código Florestal Estadual do Rio Grande do Sul, Lei Estadual n° 9519/92, levou a pecuária tradicional a ser considerada antiecológica e antieconômica. Entretanto, os usos da terra que a substituíram nos anos seguintes tiveram um impacto ambiental ainda pior, sobretudo em relação a mudança da paisagem, o que acarretou uma  redução expressiva dos Campos de Cima da Serra, ecossistema associado ao Bioma Mata Atlântica. A pesquisa e documentação do conhecimento ecológico local (CEL) sobre a pecuária tradicional é de grande relevância para a negociação deste conflito socioambiental. O objetivo do presente estudo foi testar o CEL dos pecuaristas dos Campos de Cima da Serra quanto ao período de pousio, e com base nisso, propor uma rotina de monitoramento para as licenças ambientais emitidas para o manejo dos campos através do uso do fogo. Foi proposto um sistema de monitoramento de uso do fogo utilizando sensoriamento remoto, baseado na classificação supervisionada orientada e identificação de queimadas através de sítios de treinamento, oriundos de amostras fortuitas de classes de uso conhecidas. Para isso, foi utilizado o processamento das bandas espectrais do sensor imageador OLI do satélite Landsat 8, pelo complemento “classificação semiautomática” do software Quantum GIS 2.4. Através das etapas metodológicas apresentadas, o Poder Público poderá monitorar simultaneamente diversas licenças, em curto período de tempo, o que, juntamente com medidas preventivas e mitigatórias, pode viabilizar o licenciamento ambiental do uso do fogo na região.

scholarly journals USO DO ÍNDICE TVDI E MODELO HAND PARA CARACTERIZAÇÃO DE CONDIÇÃO HÍDRICA

Irriga ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 76-84 ◽  
Author(s):  
Lucimara Wolfarth Schirmbeck ◽  
Denise Cybis Fontana ◽  
Juliano Schirmbeck ◽  
Vagner Paz Mengue
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Rio Grande ◽  
United States Geological Survey ◽  
Landsat 8 ◽  
Rio Grande Do Sul ◽  
Landsat 8 Oli ◽  
Porto Alegre ◽  
Soybean Crop ◽  
Dryness Index

USO DO ÍNDICE TVDI E MODELO HAND PARA CARACTERIZAÇÃO DE CONDIÇÃO HÍDRICA  LUCIMARA WOLFARTH SCHIRMBECK1; DENISE CYBIS FONTANA2; JULIANO SCHIRMBECK3 E VAGNER PAZ MENGUE4 1 Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia – Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, [email protected] Departamento de Plantas Forrageiras e Agrometeorologia – Faculdade de Agronomia –  Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, [email protected] Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia – Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, [email protected] Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia – Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, [email protected].  1 RESUMO O objetivo do trabalho foi avaliar a adequação do índice TVDI (Temperature Vegetation Dryness Index), obtido com sensores remotos orbitais, para caracterizar a condição hídrica de lavouras de soja no sul do Brasil. Para tanto, foram utilizadas imagens do satélite Landsat 8-OLI, obtidas da base de dados da USGS (United States Geological Survey), de três datas ao longo do ciclo da cultura da soja (5 de dezembro 2014 – implantação, 6 de janeiro 2015 - início de desenvolvimento e 7 de fevereiro de 2015 – pleno desenvolvimento vegetativo).  A área de cultivo de soja foi mapeada utilizando classificação digital (máxima verossimilhança) e validada com dados de campo. A área total mapeada foi estratificada em duas classes: áreas de várzea e áreas altas, através do uso do modelo HAND (Height Above the Nearest Drainage). Para tornar possível a comparação entre datas, o TVDI foi determinado usando um triângulo único para as três datas em conjunto, estabelecido a partir dos dados do NDVI (Normalized Difference vegetation Index) e da temperatura de superfície (TS), a qual foi estimada usando o algoritmo split-window. O TVDI permitiu diferenciar as condições hídricas na cultura da soja ao longo do ciclo e entre as classes de altitude; as áreas mais altas apresentaram maiores déficits quando comparadas às áreas de várzea. Foi possível ainda visualizar a migração dos pixels de soja dentro do triângulo evaporativo como consequência da fase de desenvolvimento da cultura e das condições hídricas. Palavras-chave: déficit hídrico, agricultura, Landsat 8-OLI.  SCHIRMBECK, L. W.; FONTANA, D. C.; SCHIRMBECK, J.; MENGUE, V.P. TVDI INDEX AND HAND MODEL FOR WATER CONDITION DESCRIPTION  2 ABSTRACT This work aims to evaluate the suitability of the Temperature Vegetation Dryness Index (TVDI), achieved through an orbital remote sensing system used to describe the condition of the water to be used on soybean crops in the South Region of Brazil. The Landsat 8-OLI satellite images were gathered from the USGS (United States Geological Survey) database of three different dates during the soybean crop cycle (December 5th, 2014 - implementation, January 6th, 2015 - beginning of growth and February 7th, 2015 - full vegetative growth). The soybean crop area was mapped using digital classification (maximum likelihood method) and validated with field data. The total mapped area was stratified into two classes: floodplain areas and high areas, using the HAND (Height Above the Nearest Drainage) model. To make the comparison between dates possible, TVDI was determined using a single triangle for all the three dates together, established using the Normalized Difference Vegetation Index (NDVI) and surface temperature (TS) data, which was estimated using Split-window algorithm. TVDI allowed us to differentiate the water conditions during the soybean crop cycle and between the two altitude classes; the higher areas presented larger deficits when compared to the floodplain areas. It was also possible to observe the migration of the soybean pixels within the evaporative triangle as a consequence of the crop’s development stage and the water conditions. Keywords: water deficit, agriculture, Landsat 8-OLI. 

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