Data/hora: 17/06/2024 10:01:21

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	19/09/2012	
Data da última atualização: 	24/01/2020	
Autoria: 	MENDONÇA-SANTOS, M. de L.; GUENAT, C.; BOUZELBOUDJEN, M.; GOLAY, F.	
Afiliação: 	MARIA DE LOURDES M SANTOS BREFIN, CNPS; C. Guenat, IATE-Pe´dologie, E´cole Polytechnique Fe´de´rale de Lausanne; M. Bouzelboudjen, UniÍersite de Neucha tel, Centre d’Hydrogeologie; F. Golay, IGEO-SIRS, Ecole Polytechnique Federale de Lausanne.	
Título: 	Three-dimensional GIS cartography applied to the study of the spatial variation of soil horizons in a Swiss floodplain.	
Ano de publicação: 	2000	
Fonte/Imprenta: 	Geoderma, v. 97, n. 3/4, p. 351-366, Sept. 2000.	
Idioma: 	Inglês	
Conteúdo: 	In this study, we propose to establish a framework for the study of the spatial variability of the soils found in the floodplain of the Sarine River and for the visualisation of soil distribution patterns in two- and three-dimensions _2-D, 3-D.. This environment is characterised by a large lateral and vertical spatial variability of soils that corresponds to the temporal and spatial variations of the fluvial dynamics of the Sarine. The study was carried out using existing Geographical Information System _GIS. functions combined with applications specific to soil cartography. This particular GIS cartography is based on the notion of the soil horizon instead of that of the soil diagnostic profile. A Global Positioning System _GPS. survey was carried out in order to construct a local Digital Elevation Model _DEM. and to ascertain the spatial coordinates for each of the 181 soil obsevation locations. All data were stored in a GIS database, and both landform modeling and soil cartography was undertaken. GIS, ARCrINFO, and Vertical Mapper for MapInfo were adequate for our linear triangulation interpolation, for contour processing and for the creation of cross-sections as well as the corresponding vertical profiles. These vertical profiles served to illustrate the superposition of soil horizons along any line across the sampled area. A 3-D representation of soil was obtained using the quadratic finite-element method, which is generally employed in geological studies and which we adapted especially for the representation of soil horizons. 3-D cartography of this type allows the spatial pattern of a given horizon - including the variation of its thickness, the superimposition of the different soil horizons, the total soil depth, and the number of horizons at any given location - to be followed through space. Our approach, furthermore, facilitates the perception of soil horizons and their juxtarelationships as 3-D objects, and permits the visualisation of the relationships that exist between any given horizon _or sequence of horizons. and the surface topography. In thus enabling the realistic representation and easy visualisation of the spatial distribution and variability of soils in the landscape, our methodological approach provides a powerful instrument for soil scientists, and a useful decisionsupport tool for ecosystem management.	
Palavras-Chave: 	Digital mapping; GIS; Soil mapping.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (16738-1) - UPC - AP - DD -  -  - 2012.00010 - DIS