English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/127229
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

The normalized topographic method: An automated procedure for gully mapping using GIS

AutorCastillo, Carlos ; Taguas, E. V.; Zarco-Tejada, Pablo J. ; James, Michael R.; Gómez Calero, José Alfonso
Palabras claveDEM
Gully erosion
Fecha de publicación24-may-2014
EditorJohn Wiley & Sons
CitaciónEarth Surface Processes and Landforms 39(15): 2002- 2015 (2014)
ResumenGully delineation is a critical aspect of accurately determining soil losses but associated methodologies are rarely detailed. Here, we describe a new gully mapping method, the normalized topographic method (NorToM), based on processing digital elevation model (DEM) data, and we assess associated errors when it is applied over a range of geomorphological scales. The NorToM is underpinned by two gully detection variables (normalized slope and elevation) calculated over local windows of prescribed size, and a group of filtering variables. For four study sites, DEMs of gullies were obtained using field and airborne photo-reconstruction and evaluated using total station and differential global positioning system (dGPS) survey. NorToM provided accurate areal and volume estimates at the individual gully scale but differences increased at the larger gully system and gully network scales. We were able to identify optimal parameters for using the NorToM approach and so confirm that is represents a useful scale-independent means of gully mapping that is likely to be valid in other environments. Its main limitations are that the normalization process might be time-consuming at regional scales and the need for a fixed window size when applied to landforms with extreme variations in dimensions.
Versión del editorhttp://doi.org/10.1002/esp.3595
Identificadoresdoi: 10.1002/esp.3595
issn: 1096-9837
Aparece en las colecciones: (IAS) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.