Estimativa do fator topografico da USLE a partir de tres algoritmos



Título del documento: Estimativa do fator topografico da USLE a partir de tres algoritmos
Revista: Revista ambiente & agua
Base de datos: PERIÓDICA
Número de sistema: 000331112
ISSN: 1980-993X
Autores: 1
1
1
2
Instituciones: 1Universidade Federal de Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul. Brasil
2Universidade Estadual de Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul. Brasil
Año:
Volumen: 5
Número: 2
Paginación: 217-225
País: Brasil
Idioma: Portugués
Tipo de documento: Artículo
Enfoque: Experimental, aplicado
Resumen en inglés Several researchers have proposed the mathematical modeling of the topographic factor (slope length and slope steepness) of the Universal Soil Loss Equation (USLE) in different conditions of relief. This paper presents an analysis of the performance of three equations in the production of the topographic factor as well as the influence of slope steepness in its estimation. Topographic data processed in a geographic information system were used to derive the digital elevation model that was applied to calculate the topographic factor using the software USLE-2D. Differences between the results when using distinct algorithms were found and areas with larger slope steepness resulted in greater differences. The slope corresponded to 75.1%, 83.8% and 82.8% of the topographic factor in the studied equations. Therefore, the slope has more influence than the length of the ramp in the calculation of the topographic factor. In addition, the choice of the equation to be applied to obtain such factor is dependent upon the local relief
Disciplinas: Ingeniería
Palabras clave: Ingeniería civil,
Topografía,
Modelos digitales de elevación (MDE),
Pendientes,
Erosión hídrica
Keyword: Engineering,
Civil engineering,
Topography,
Digital elevation models (DEM),
Slopes,
Water erosion
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