15 documents found, page 1 of 2
Sediment source and volume of soil erosion in a gully system using UAV photogra...
Cândido, Bernardo Moreira; James, Mike; Quinton, John; Lima, Wellington de; Silva, Marx Leandro NavesGully erosion is a severe way of land degradation. Gullies threaten the sustainability of agro-ecosystems, causing quantitative and qualitative reduction of groundwater, farmland productivity, and waterways sedimentation. Since the gully development on the surface begins with water flow and sheet erosion, accurate monitoring of the erosive processes in a gully system and its quantification is key for the develo...
Assessing sediment yield and streamflow with SWAT model in a small sub-basin of...
Pontes, Lucas Machado; Batista, Pedro Velloso Gomes; Silva, Bárbara Pereira Christofaro; Viola, Marcelo Ribeiro; Rocha, Humberto Ribeiro daHydro-sedimentological models might be useful tools for investigating the effectiveness of soil and water conservation practices. However, evaluating the usefulness of such models requires that predictions are tested against observational data and that uncertainty from model parameterization is addressed. Here we aimed to evaluate the capacity of the SWAT model to simulate monthly streamflow and sediment load i...
Rainfall erosivity estimation: Comparison and statistical assessment among meth...
Cardoso, Dione Pereira; Avanzi, Junior Cesar; Ferreira, Daniel Furtado; Acuña-Guzman, Salvador Francisco; Silva, Marx Leandro NavesTexto completo; Rainfall erosivity (R factor) is one of the six factors of the Universal Soil Loss Equation, being calculated based on the product of rainfall kinetic energy multiplied by its 30-minute maximum intensity. However, the lack of detailed and reliable rainfall data in many parts of the world has driven the use of other methods to estimate rainfall erosivity based on daily, monthly or annual data. Th...
Monitoring land use impacts on sediment production: a case study of the pilot c...
Bispo, Diêgo Faustolo Alves; Batista, Pedro Velloso Gomes; Guimarães, Danielle Vieira; Silva, Marx Leandro Naves; Curi, Nilton; Quinton, John NormanThrough the lack or non-use of conservationist criteria for adequate land use and management, the scarcity of natural resources becomes ever more evident. This study aimed to analyze the origin of the sediments in the Posses catchment, municipality of Extrema, state of Minas Gerais, Brazil, throughout the fingerprinting technique and portable X-ray fluorescence. Samples from soils under agriculture, pasture, an...
Erosão hídrica em latossolo vermelho sob diversos sistemas de manejo do cafeeir...
Carvalho, Ricardo; Silva, Marx Leandro Naves; Avanza, Junior Cesar; Curi, Nilton; Souza, Fabiana Silva deA erosão hídrica contribui para a redução da sustentabilidade dos sistemas agrícolas. O presente estudo avaliou, sob condições de chuva natural, as perdas de solo, água, nutrientes e matéria orgânica em um Latossolo Vermelho distroférrico típico, com 12 % de declividade, localizado na região de Lavras (MG). O trabalho foi conduzido em parcelas experimentais de perdas de solo. Os sistemas de manejo estudados for...
Índice de cobertura vegetal pela cultura do milho no período de chuvas intensas...
Souza, Fabiana Silva de; Silva, Marx Leandro Naves; Curi, Nilton; Avanzi, Junior Cesar; Pinho, Renzo Garcia Von; Lima, Gabriela CamargosA cobertura vegetal é a defesa natural do solo contra a erosão hídrica. Nos modelos de estimativas de perdas de solo, o efeito da cobertura vegetal na interceptação da energia cinética da chuva é a variável chave na modelagem do processo erosivo. Assim sendo, objetivou-se avaliar a eficiência da cobertura vegetal, proporcionada pela cultura do milho, e suas relações com os atributos fitotécnicos desta cultura p...
Métodos de indexação de indicadores na avaliação da qualidade do solo em relaçã...
Cândido, Bernardo Moreira; Silva, Marx Leandro Naves; Curi, Nilton; Freitas, Diego Antônio França de; Mincato, Ronaldo Luiz; Ferreira, Mozart MartinsA avaliação da qualidade dos solos agrícolas é importante para definição e adoção de práticas de manejo que garantam a sustentabilidade socioeconômica e ambiental. Os métodos de indexação dos indicadores de qualidade denominados Índice de Qualidade Integrado (IQI) e Índice de Qualidade Nemoro (IQN) foram utilizados neste estudo para avaliar a qualidade de solo em áreas experimentais de plantio de eucalipto. A s...
Soil, water, nutrients and soil organic matter losses by water erosion as a fun...
Bispo, Diêgo Faustolo Alves; Silva, Marx Leandro Naves; Pontes, Lucas Machado; Guimarães, Danielle Vieira; Marques, João José Granate de Sá e MeloKnowledge of the quantity and quality of the material lost by soil erosion due to soil management is a basic need to identify land management zones in catchments. The aim of this study was to investigate the influence of soil management on the quantity and quality of soil material lost by erosion in the Posses sub-watershed, Municipality of Extrema, State of Minas Gerais, Brazil. Water and sediments lost by nat...
Water erosion associated with rainfall patterns in the extreme South of Bahia i...
Guimaraes, Danielle Vieira; Silva, Marx Leandro Naves; Bispo, Diêgo Faustolo Alves; Martins, Sérgio Gualberto; Melo Neto, Jose de OliveiraSoil and water losses caused by water erosion represent a risk of environmental damage and loss of soil productivity, with economic, social and environmental consequences. Plant cover is an important ally against water erosion, together with the knowledge of rainfall characteristics. Thus, this study aimed to evaluate the soil and water losses and to determine rainfall patterns in two homogeneous eucalyptus pla...
Índice de cobertura vegetal e sua modelagem para cultivares de soja no sul de M...
Barreto, Vitor Corrêa de Mattos [UNESP]; Silva, Marx Leandro Naves; Curi, Nilton; Oliveira, Flávio Pereira de; Rezende, Pedro Milanez deSubmitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:03:37Z No. of bitstreams: 1 S1413-70542010000500013.pdf: 69223 bytes, checksum: ed987a7b1382677dddf115ad95dd5229 (MD5); Made available in DSpace on 2013-08-22T19:03:37Z (GMT). No. of bitstreams: 1 S1413-70542010000500013.pdf: 69223 bytes, checksum: ed987a7b1382677dddf115ad95dd5229 (MD5) Previous issue date: 2010-10-01; Made available ...