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| Registros recuperados: 32 | |
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| Mello, Eloy Lemos de; Universidade Estadual do Oeste do Paraná; Pruski, Fernando Falco; Universidade Federal de Viçosa; Bertol, Ildegardis; Universidade do Estado de Santa Catarina; Costa, Lucas Mucida; Universidade Federal de Viçosa; Menezes, Gleiph Ghiotto; Universidade Federal de Viçosa; Rodrigues, Nívia Carla; Universidade Federal de Viçosa. |
| The purpose of this work was to develop a hydrological model for the simulation of the water balance in agricultural areas. The model uses a double exponential equation to represent the rainfall profile and uses the Green-Ampt-Mein-Larson equation to estimate the soil water infiltration rate. To evaluate the model, monthly and yearly rainfall and runoff data were obtained from four experimental plots located at the State University of Santa Catarina, UDESC, in the period from 2003 to 2008. The four treatments were bare soil (BS), conventional tillage (CT), minimum tillage (MT) and no-tillage (NT). The simulation was carried out using two synthetic rainfall series, one adjusted on a monthly basis (SAMB) and the other adjusted on a daily basis (SADB). The... |
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Palavras-chave: Ciências Agrárias; Agronomia; Engenharia de Água e Solo; Conservação de Solo e Água 5.00.00.00-4; 5.03.02.00-0; 5.03.02.02-7 rrunoff; Infiltration; Water erosion; Hydrological modeling Ciências Agrárias; Engenharia de Água e Solo; Conservação de Solo e Água. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14733 |
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| Martinez G,Ingrid; Ovalle,Carlos; Del Pozo,Alejandro; Uribe,Hamil; Valderrama V,Natalia; Prat,Christian; Sandoval,Marco; Fernández,Fernando; Zagal,Erick. |
| Chilean dryland areas of the Mediterranean climate region are characterized by highly degraded and compacted soils, which require the use of conservation tillage systems to mitigate water erosion as well as to improve soil water storage. An oat (Avena sativa L. cv. Supernova-INIA) - wheat (Triticum aestivum L. cv. Pandora-INIA) crop rotation was established under the following conservation systems: no tillage (Nt), Nt + contour plowing (Nt+Cp), Nt + barrier hedge (Nt+Bh), and Nt + subsoiling (Nt+Sb), compared to conventional tillage (Ct) to evaluate their influence on soil water content (SWC) in the profile (10 to 110 cm depth), the soil compaction and their interaction with the crop yield. Experimental plots were established in 2007 and lasted 3 yr till... |
| Tipo: Journal article |
Palavras-chave: Neutron probe; Penetrometer resistance; Oat; Subsoiling; Water erosion; Wheat. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400018 |
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| Silva,Bárbara Pereira Christofaro; Silva,Marx Leandro Naves; Batista,Pedro Velloso Gomes; Pontes,Lucas Machado; Araújo,Elias Frank; Curi,Nilton. |
| ABSTRACT Monitoring water erosion and the factors that control soil and water loss are essential for soil conservation planning. The objective of this study was to evaluate soil and water losses by water erosion under natural rainfall in eucalyptus plantations established in 2001 (EF2), and 2004 (EF1), native forest (NF) and bare soil (BS), during the period of 2007 to 2012; and to determine the USLE factors: rain erosivity (R), erodibility (K) of a Red Argisol and the cover-management factor (C) for EF1, EF2 and NF at a pilot sub-basin, in Eldorado do Sul, RS, Brazil. The R factor was estimated by the EI30 index, using rainfall data from a gauging station located at the sub-basin. The soil and water losses were monitored in erosion plots, providing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Soil erodibility; Rainfall erosivity; Cover-management factor. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000400432 |
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| Bispo,Diêgo Faustolo Alves; Silva,Marx Leandro Naves; Marques,João José Granate de Sá e Melo; Bechmann,Marianne; Batista,Pedro Velloso Gomes; Curi,Nilton. |
| ABSTRACT Identifying and ranking nutrient loss risk areas are important steps towards integrated catchment management. This study aimed to apply the P index model at the Posses catchment, south of the state of Minas Gerais, Brazil. We applied the P index for the current land use at the Posses catchment and for two hypothetical scenarios: scenario 1, in which P fertilizer was applied to all land uses, except for native forests; and scenario 2, which considered the use of P fertilizer as in scenario 1, and that the Environmental Protection Areas referring to the riparian forests and springs were totally restored. Considering current land use, almost the whole catchment area (91.4%) displayed a low P loss risk. The highest P index was associated to croplands... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: P index; Nutrient loss; Water erosion; Land use management; Environmental services.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500565 |
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| Lense,Guilherme Henrique Expedito; Parreiras,Taya Cristo; Moreira,Rodrigo Santos; Avanzi,Junior Cesar; Mincato,Ronaldo Luiz. |
| ABSTRACT Water erosion is one of the main problems faced in coffee cultivation, as it promotes environmental degradation and crop yield decrease. Erosion estimates support the planning of conservation management practices and allowing determining the rates of soil losses. Thus, the objective of this paper was to estimate the soil loss by water erosion using the Erosion Potential Method in a sub-basin predominantly covered by coffee cultivation and then to compare the results with the Soil Loss Tolerance limits. The study area is the Coroado Stream Sub-basin, located at Alfenas Municipality, south of Minas Gerais, Brazil. The sub-basin presented an Erosion Coefficient of 0.272, indicating a predominance of low-intensity erosion. The total soil loss estimate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil conservation; Water erosion; Modeling.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100225 |
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| Gomide,Plínio Henrique Oliveira; Silva,Marx Leandro Naves; Castro,Gislene Carvalho de; Soares,Cláudio Roberto Fonsêca Sousa; Oliveira,Anna Hoffmann; Curi,Nilton. |
| Gullies are an expression of intense environmental degradation, particularly soil and vegetation. The objective of this work was to characterize the natural regeneration and vegetation planted in gully areas in the south of Minas Gerais State, Brazil, so the distribution and occurrence of the species can generate useful information for an adequate diagnosis on the development stage of gullies and for soil conservation. The study involved the characterization of vegetation present in the different segments of the gully areas, the bed, the bare middle third (BMT), middle third with vegetation cover (MTVC), and a fragment of native vegetation (FNV) located closer to the gully areas and adopted as a reference. In the gully area 3, the sampling took place in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Natural regeneration; Plant cover. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200006 |
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| Lense,Guilherme Henrique Expedito; Moreira,Rodrigo Santos; Bócoli,Fernanda Almeida; Avanzi,Junior Cesar; Teodoro,Alexandre Elias de Miranda; Mincato,Ronaldo Luiz. |
| ABSTRACT Among the parameters considered by the Revised Universal Soil Loss Equation (RUSLE), the soil cover and management factor (C) is the main human influenced factor affecting the estimation of water erosion, and one of the most sensitive to spatiotemporal variations. Consequently, this study aims to compare the efficiency of C factor estimates obtained from the literature for each land-use class (Clit) and by calculation based on the Normalized Difference Vegetation Index (CNDVI). We test the hypothesis that soil loss estimates based on CNDVI approach are more accurate than those based on Clit. Water erosion was estimated based on soil morphological, physical, and chemical properties in addition to climate, relief, management practices, and land use... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil conservation; Water erosion; Modeling; RUSLE. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100214 |
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| Oliveira,Paulo T. S.; Rodrigues,Dulce B. B.; Sobrinho,Teodorico A.; Carvalho,Daniel F. de; Panachuki,Elói. |
| Information about rainfall erosivity is important during soil and water conservation planning. Thus, the spatial variability of rainfall erosivity of the state Mato Grosso do Sul was analyzed using ordinary kriging interpolation. For this, three pluviograph stations were used to obtain the regression equations between the erosivity index and the rainfall coefficient EI30. The equations obtained were applied to 109 pluviometric stations, resulting in EI30 values. These values were analyzed from geostatistical technique, which can be divided into: descriptive statistics, adjust to semivariogram, cross-validation process and implementation of ordinary kriging to generate the erosivity map.Highest erosivity values were found in central and northeast regions of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Rainfall erosivity index; Geostatistics. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100008 |
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| Botelho,Thiago H. A.; Jácomo,Simone de A.; Almeida,Rherison T. S.; Griebeler,Nori P.. |
| ABSTRACT The assessment of land use and occupation is essential for predicting soil loss due to water erosion. The objective of this study was to determine criteria for monitoring soil loss in agricultural areas using the Universal Soil Loss Equation (USLE). Soil loss data were intersected with USLE factors and slope using geoprocessing techniques for the Samambaia River watershed, located in Cristalina, Goiás state, Brazil. A slope of 3% to 8% was found in approximately 50% of the study area. However, mean soil losses <10 t ha-1 year-1 were observed in slopes ≤ 3%, where the mean soil length (L) and slope steepness (S) were ≤2 and 0.2, respectively. The intersection of soil loss data with USLE factors was useful for identifying criteria for monitoring... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil cover; Water erosion; Topographic factor; Conservation management. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100013 |
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| LIMA, J. E. F. W.; LOPES, W. T. A.; SILVA, E. M. da; VIEIRA, M. R.. |
| RESUMO: O conhecimento do comportamento hidrossedimentológico de uma bacia hidrográfica é fundamental para a adequada gestão e uso de seus recursos hídricos. Este traballho objetivou realizar, a partir dos dados hidrossedimentométricos da Bacia do Rio Piquiri, um diagnóstico sobre o seu comportamento hidrossedimentológico. Utilizando os dados fluviométricos e hidrossedimentométricos do banco de dados Hidro, sob gestão da Agência Nacional das Águas - ANA, foi estimado o potencial para produção ou deposição de sedimentos de cada trecho da bacia, aplicando o procedimento de balanço de massa. Foram identificados três trechos onde ocorre deposição de sedimentos na bacia: entre as estações Porto Carriel e Porto Guarani, no Rio Piquiri; entre as estações Porto... |
| Tipo: Folhetos |
Palavras-chave: Manejo da água; Sediment; Bacia Hidrográfica; Erosão Hídrica; Hidrologia; Sedimento; Recurso Hídrico; Qualidade da Água; Hydrology; Watersheds; Water erosion; Water management; Water quality; Water resources. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569087 |
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| Santos,Maria Aparecida do Nascimento dos; Bertol,Ildegardis; Kaufmann,Danieli Schneiders; Mecabô Júnior,José; Bagio,Bárbara. |
| Abstract: The objective of this work was to determine adjustment parameters for the revised universal soil loss equation (Rusle) of a soil subjected to pig slurry application. Treatments consisted of 0, 50, 100, and 200 m3 ha-1 pig slurry (PS), after the cultivation of black oat (Avena strigosa), besides the application of 50 m3 ha-1 PS for six times onto the soil surface in a temporal sequence, and a control treatment of soil without cultivation and without pig slurry application. The evaluations were performed for black oat shoot dry mass, root mass and crop residues semi-incorporated into the soil (RMR), soil losses by means of simulated rain, and the parameters for water erosion modeling. The pig slurry application onto soil surface caused a reduction... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena strigosa; Cultural residue factor; Mathematical model; Simulated rain; Soil consolidation factor; Water erosion. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001001167 |
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| Thomaz,Edivaldo Lopes. |
| Gully erosion occurs by the combined action of splash, sheetwash and rill-wash (interrill and rill erosion). These erosion processes have a great capacity for both sediment production and sediment transport. The objectives of this experiment were to evaluate hydrological and sediment transport in a degraded area, severely dissected by gullies; to assess the hydraulic flow characteristics and their aggregate transport capacity; and to measure the initial splash erosion rate. In the study area in Guarapuava, State of Paraná, Brazil (lat 25º 24' S; long 51º24' W; 1034 m asl), the soil was classified as Cambissolo Húmico alumínico, with the following particle-size composition: sand 0.116 kg kg-1; silt 0.180 kg kg-1; and clay 0.704 kg kg-1. The approach of this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Field measurement; Water erosion; Simulated rain; Rainsplash; Runoff. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000100025 |
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| Machado,Roriz Luciano; Carvalho,Daniel Fonseca de; Rouws,Janaina Ribeiro Costa; Almeida,Wilk Sampaio de; Oliveira,Paulo Tarso Sanches de. |
| ABSTRACT The identification of areas with greater erosive potential is important for planning soil and water conservation. The objective of this study was to evaluate the physical characteristics of rainfall events in the state of Rio de Janeiro, Brazil, and their interactions with rainfall patterns through multivariate statistical analysis. Rainfall depth, kinetic energy, 30-min intensity (I30), duration of rainfall events, and the erosivity indices KE >10, KE >25, and EI30 in 36 locations (stations) were subjected to principal component analysis (PCA) and canonical discriminant analysis (CDA). Based on evaluation of the respective historical series of hyetographs, it was found that the advanced pattern occurs with highest frequency (51.8 %),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; EI30; Canonical discriminant analysis. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100535 |
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| Avanzi,Junior Cesar; Viola,Marcelo Ribeiro; Mello,Carlos Rogério de; Giongo,Marcos Vinicius; Pontes,Lucas Machado. |
| ABSTRACT The state of Tocantins is inserted in the new Brazilian agricultural frontier and has shown enormous potential for expansion of the agricultural lands. However, there is a lack of more elaborate scientific information for better planning and guide agricultural activities, especially regarding the soil and water conservation. Tocantins has a relevant rainfall spatial variability and, consequently, rainfall erosivity. Thus, this work aimed to develop models to estimate the mean monthly and annual rainfall and means rainfall erosivity factor (R-factor) of the Universal Soil Loss Equation (USLE) for the state of Tocantins. For that, 97 historical series of daily rainfall were studied, considering a standard period of 25 years (1985-2009). The fitting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Geostatistics; Regression-kriging; Soil and water conservation; Mapping. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100524 |
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| Registros recuperados: 32 | |
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