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Registros recuperados: 57 | |
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Mello,Carlos Rogério de; Norton,Lloyd Darrell; Curi,Nilton; Yanagi,Silvia Nazaré Monteiro. |
Relationships between regional climates and oceanic and atmospheric anomalies are important in understanding the rainfall regime of a given region. This work aimed to analyze rainfall erosivity in the Upper Grande River Basin, Southern Minas Gerais State, Brazil; namely the two most representative environments, the Mantiqueira Range (MR) and the Plateau of Campos das Vertentes (PCV). These areas can be affected by the El Niño Southern Oscillation (ENSO) phenomena, which can be evaluated by indicators such as Sea Surface Temperature (SST) for the Niño 3.4 Region. Rainfall erosivity was calculated for individual rainfall events from January, 2006 to December, 2010. Pearson's coefficient of correlation was used to evaluate the relationships between rainfall... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion; El-Niño; La-Niña; Grande River basin. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000100007 |
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Steinmetz,Alice Alonzo; Cassalho,Felício; Caldeira,Tamara Leitzke; Oliveira,Vinícius Augusto de; Beskow,Samuel; Timm,Luis Carlos. |
ABSTRACT Soil erosion is currently one of the main concerns in agriculture, water resources, soil management and natural hazards studies, mainly due to its economic, environmental and human impacts. This concern is accentuated in developing countries where the hydrological monitoring and proper soil surveys are scarce. Therefore, the use of indirect estimates of soil loss by means of empirical equations stands out. In this context, the present study proposed the assessment of the Revised Universal Soil Loss Equation (RUSLE) with the aid of Geographical Information Systems (GIS) and remote sensing for two agricultural watersheds in southern Rio Grande do Sul - Brazil. Among all RUSLE factors, LS showed the closest patterns to the local when compared to the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion; Revised universal soil loss equation; Geographical information systems; Remote sensing. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600575 |
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Youlton,Cristian; Bragion,Ana Paula; Wendland,Edson. |
C. Youlton, A. P. Bragion, and E. Wendland. 2016. Experimental evaluation of sediment yield in the first year after replacement of pastures by sugarcane. Cien. Inv. Agr. 43(3): 374383. Sugarcane cultivation has expanded in south-eastern Brazil in the last decade, mainly for biofuel (ethanol) production. This expansion has occurred on land that was originally covered with pasture and used for livestock production. The purpose of this study is to experimentally determine the impact on runoff and erosion produced by replacing pasture with sugarcane. Runoff plots of 100 m² were established at a farm in Itirapina, Sao Paulo (SP), Brazil, on a hill with a 9% slope and sandy soil. An 18-year-old pasture and a new sugarcane plantation were studied. The degrees of... |
Tipo: Journal article |
Palavras-chave: Land use change; Runoff; Sediment granulometry; Soil erosion. |
Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300005 |
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Youlton,Cristian; Espejo,Paulina; Biggs,Jaime; Norambuena,Marcela; Cisternas,Marco; Neaman,Alexander; Salgado,Eduardo. |
Soil erosion increases after building downward ridges along steep hillslopes, in particular during the first winter. This erosion decreases when trees grow, but runoff increases. This study presents results of erosion under five different treatments: (i) soil cover with native vegetation, (ii) bare downward ridges, (iii) downward ridges with six year-old avocado orchard, (iv) downward ridges with plant cover and (v) downward ridges covered with agroindustrial waste sludge. The results revealed 20 t ha-1 of soil erosion during the first year after ridges were built, while mitigation measures can reduce erosion in 90%. Adult orchard showed the largest runoff, which probably is due to the effect of a high and about constant soil moisture during irrigation... |
Tipo: Journal article |
Palavras-chave: Soil erosion; Runoff; Agroindustrial waste sludge; Plant cover; Ridges along slope; Steep hillslope; Avocado orchards; Chile. |
Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300010 |
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Gaspari,Fernanda J; Rodríguez Vagaría,Alfonso M; Senisterra,Gabriela E. |
In a hydrographic watershed, the erosionability (K factor) of the soil evaluation depends on the technical resources, developed applied sciences, and spatial technology available. For the determination of erosionability in the watershed of Pillahuinco Grande s Creek (Argentina) (38°S, 61°15'W), the Universal Soil Loss Equation (USLE) was used by applying a geographic information system (GIS) for the cartographic evaluation. A database of geological, environmental, and soil associations was developed, which indicated that geomorphologic variability, caused by geology and soil, significantly determines the spatial variation of the K factor values, in a range from 0.02 to 0.69 ((t·m²·h)·(ha·J·cm)-1). A new quantification was determined with the simplified K... |
Tipo: Journal article |
Palavras-chave: GIS; Soil; Soil erosion; USLE; Watershed. |
Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100003 |
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González Lanteri,David; Huete,Alfredo; Kim,HoJin; Didan,Kamel. |
Using the 16 day MODIS (aboard the EOS Terra satellite) 250m NDVI and ground biophysical and spectral measurements we established simple relationships between these parameters and the canopy cover. The canopy cover is used in water erosion models to estimate the amount of soil loss under precipitation events and specific geographic conditions. Two transects, in the grassland part of the Walnut Gulch Experimental Watershed (WGEW) located near the town of Tombstone in Arizona, were established for ground data collection. Ground measurements were performed every 16 days, to coincide with the Terra Satellite overpass. Erosion, in desert environment is a contributing factor to soil degradation and subsequently desertification. Erosion is strongly related with... |
Tipo: Journal article |
Palavras-chave: Canopy cover; MODIS; Soil erosion; Semi arid environment. |
Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200043 |
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GOMES, M. A. F.; FILIZOLA, H. F.; PAULA, M. M. de; DIOGO, A.; CERDEIRA, A. L.. |
O presente trabalho tem por objetivo apresentar os dados de reconhecimento e de seleção de áreas de recarga visualmente mais críticas do Aquífero Guarani, localizadas no município de Mineiros, GO, dentro da porção noroeste da Bacia Sedimentar do Paraná. Os locais selecionados serão objeto de estudo do projeto denominado "Uso agrícola das áreas de recarga do Aquífero Gurani e implicações na qualidade da água subterrânea", principalmente no que se refere à caracterização de áreas que oferecem maior risco de ocntaminação (potencial e efetivo) para a água subterrânea, à partir das atividades agrícolas, como também do projeto intitulado "Recuperação ambiental das nascentes do Rio Araguaia. |
Tipo: Folhetos |
Palavras-chave: Aquífero; Área de recarga; Agricultura; Impacto ambiental; Agrotóxico; Desmatamento; Erosão do solo; Agriculture; Environmental impact; Pesticides; Deforestation; Soil erosion. |
Ano: 2000 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/963895 |
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FILIZOLA, H. F.; ALMEIDA FILHO, G. S. de; CANIL. K.; SOUZA, M. D. de; GOMES, M. A. F.. |
A erosão acelerada, ou erosão antrópica, é um problema mundial. Vastas áreas estão sujeitas à degradação do solo, às vezes de forma irreversível, por uma série de processos como erosão e desertificação acelerada, compactação e selamento, salinização, acidificação, diminuição da matéria orgânica e da fertilidade do solo e redução da biodiversidade (LAL, 1994). O controle dos processos erosivos deve estar fundamentado em princípios básicos de manejo de solos com o propósito de evitar o impacto das gotas de chuva, facilitar a infiltração de água no solo, e disciplinar o escoamento superficial, seja ele difuso ou, em especial, concentrado, |
Tipo: Folhetos |
Palavras-chave: Ravina; Voçoroca; Erosão do solo; Controle da Erosão; Soil erosion; Erosion control. |
Ano: 2011 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/915009 |
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CALDERANO FILHO, B.; ANDRADE, A. G. de; MANZATTO, C. V.; CALDERANO, S. B.; DONAGEMMA, G. K.; MIRANDA, E. A.; PEREIRA, L. A.; MELLO, J. B. de; COSTA, M. R. da; SOUZA, J. S. de. |
O diagnóstico do meio físico dos reassentamentos rurais no entorno do reservatório da usina hidrelétrica de Manso, no município de Chapada dos Guimarães, teve o objetivo de caracterizar e analisar a estrutura da paisagem, incluindo aspectos físicos e ecológicos, para o planejamento e manejo conservacionista da área. Os procedimentos utilizados envolveram a geração de dados básicos no campo, por meio de mapeamentos temáticos do meio físico, sendo produzidos mapas de solos, relevo, declividade e uso da terra, incluindo vegetação, hidrografia e avaliação da aptidão agrícola das terras. Os resultados produzidos fornecem subsídios básicos para o planejamento e manejo adequado dos recursos solo e água e contribuem para a elaboração do plano de manejo... |
Tipo: Livros |
Palavras-chave: Manejo do Solo; Erosão do Solo; Recurso do Solo; Manejo de Água; Soil management; Soil erosion; Soil resources; Water management. |
Ano: 2006 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1108236 |
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Registros recuperados: 57 | |
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