SIAT - Sistema de Avaliação de Terras

• Autor(a) principal: Garcia, Gilberto J. [UNESP]
• Data de Publicação: 2001
• Outros Autores: Espindola, Carlos R.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1415-43662001000200008; http://hdl.handle.net/11449/211621
• topic: land suitability; eoprocessing; soil; climate; aptidão agrícola; geoprocessamento; solo; clima

The purpose of this work was to adapt the MicroLEIS - Land Evaluation Information System developed in Spain to the Brazilian Southeast conditions. Twelve (12) variables were considered, as follows: A - Relief Factor: 1) Slope; B - Soil Factor: 2) Effective depth, 3) Texture, 4) Stoniness, 5) Drainage, 6) Salinity; C - Erosion Factor: 7) Erodibility, 8) Slope, 9) Vegetation density, 10) Rainfall erosivity; D - Bioclimatic Deficiency Factor: 11) Frost, 12) Available water. For each of them, the control parameters were changed, according to conditions of the soils of the State of São Paulo. In this case, salinity was substituted by the pH. As a second step, the SIAT was interfaced with the GIS - Geographic Information System - IDRISI, to facilitate the data input, processing and spatialization of the results. The program structure was changed from Basic to C, and a database (Clipper) and routines were introduced so as to make the system more friendly. The modified system was tested in the Leme - SP region, showing good results in larger scale, although it is more indicated for regional evaluations at scales between 1:100,000 and 1:50,000.