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| Registros recuperados: 54 | |
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| Bertol,Ildegardis; Luciano,Rodrigo Vieira; Bertol,Camilo; Bagio,Bárbara. |
| ABSTRACT Soil erosion from water causes loss of nutrients and organic carbon, enriches the environment outside the erosion site, and results in costs. The no-tillage system generates increased nutrient and C content in the topsoil and, although it controls erosion, it can produce a more enriched runoff than in the conventional tillage system. This study was conducted in a Humic Cambisol in natural rainfall from 1997 to 2012 to quantify the contents and total losses of nutrients and organic C in soil runoff, and to calculate the enrichment rates and the cost of these losses. The treatments evaluated were: a) soil with a crop, consisting of conventional tillage with one plowing + two harrowings (CT), minimum tillage with one chisel plowing + one harrowing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil erosion; Soil and water losses; Nutrient losses; Cost of erosion. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100506 |
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| Santos,Julio Cesar Neves dos; Andrade,Eunice Maia de; Medeiros,Pedro Henrique Augusto; Palácio,Helba Araújo de Queiroz; Araújo Neto,José Ribeiro de. |
| ABSTRACT The semi-arid region in the northeast of Brazil is characterised by rains of high intensity and short duration, with the processes of erosion being aggravated by an inappropriate land-use model. In this region, the lack of measured data for runoff and sediment yield increases the need to apply hydro-sedimentological models in estimating erosion, requiring knowledge of the actual sediment delivery ratio for the region. The aim of this study therefore, was to map soil erosion, making use of the Universal Soil Loss Equation (USLE), in the Iguatu Experimental Watershed (IEW). The mean annual sediment delivery ratio (SDR), and the SDR for individual events, was calculated from hydro-sedimentological measurements, contributing to an understanding of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sediment yield; Soil erosion; USLE; SDR. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100049 |
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| Pinto,Leandro Campos; Mello,Carlos Rogério de; Norton,Lloyd Darrell; Poggere,Giovana Clarice; Owens,Phillip Ray; Curi,Nilton. |
| ABSTRACT: The Mantiqueira Range region is one of the most important headwaters in southeastern Brazil. In this context, the relationship between pedology and hydrology has been debated and analyzed in recent years, contributing to the creation of a multidisciplinary science call hydropedology. Therefore, the aim of this study was to evaluate the hydropedological properties of a mountainous Clayey Humic Dystrudept in the Mantiqueira Range region, in the state of Minas Gerais, Brazil, comparing two land-uses, native forest and pasture. The hydraulic conductivity results demonstrated that native forest (MFO) has a strong influence on this parameter, offering conditions for movement of water in the soil that are more adequate in this profile than in pasture.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: S index; Saturated hydraulic conductivity; Soil pore size distribution; Soil erosion; Water quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100060 |
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| Bertol,Oromar João; Rizzi,Nivaldo Eduardo; Favaretto,Nerilde; Lana,Maria do Carmo. |
| The no-till system has been intensively used in the state of Paraná, Brazil, and it has increased the nutrients level at the soil surface. This has contributed for nutrient losses via runoff and consequently, off-site water pollution. The objective of this study was to evaluate phosphorus loss in surface runoff by simulated rainfall on an Oxisol, under no-till system following application of mineral fertilizer and liquid swine manure. Nitrogen, soil and water losses from the same study are reported in a separated paper. The application of liquid swine manure, compared with mineral fertilization, increased runoff concentration of total P, particulate P and dissolved reactive P by 193%, 111% and 506%, respectively, averaged for all rainfall intensities.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Liquid swine manure; Water quality; Eutrophication; Soil erosion; Conservation tillage. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100010 |
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| Sparovek,Gerd; De Maria,Isabella Clerici. |
| Erosion tolerance is the most multidisciplinary field of soil erosion research. Scientists have shown lack in ability to adequately analyze the huge list of variables that influence soil loss tolerance definitions. For these the perspectives of erosion made by farmers, environmentalists, society and politicians have to be considered simultaneously. Partial and biased definitions of erosion tolerance may explain not only the polemic nature of the currently suggested values but also, in part, the nonadoption of the desired levels of erosion control. To move towards a solution, considerable changes would have to occur on how this topic is investigated, especially among scientists, who would have to change methods and strategies and extend the perspective of... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Soil erosion; Soil degradation; Land use planning. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200029 |
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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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| 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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| 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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| 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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| Registros recuperados: 54 | |
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