SUITABILITY FOR AGRICULTURAL AND FORESTRY MECHANIZATION OF THE URUÇUÍ-PRETO RIVER HYDROGRAPHIC BASIN, PIAUÍ, BRAZIL

APTIDAO A MECANIZACAO AGRICOLA E FLORESTAL NA BACIA HIDROGRAFICA RIO URUCUI-PRETO, PIAUI, BRASIL Neste trabalho objetivou-se caracterizar a aptidao a mecanizacao agricola e florestal na Bacia Hidrografica do Rio Urucui-Preto, estado do Piaui, de forma a subsidiar o planejamento de uso, intervencoes, manejo do solo e gestao ambiental para a area em estudo. Com uso do Software ArcGIS 10.0 foi gerado o mapa de declividade do terreno, a partir da base SRTM / MDE (Modelo Digital de Elevacao), processado e analisado a partir da interpretacao e atribuicao das classes de declividade em graus para indicacao das areas com restricao a aptidao a mecanizacao. Foi gerado o mapa de classes de solo, a fim de auxiliar na interpretacao da capacidade a mecanizacao por parâmetros pedologicos, e a partir disso foi obtido o mapa final de aptidao a mecanizacao na bacia em estudo. A partir dos resultados, as classes de aptidao das terras a mecanizacao, apresentaram-se de acordo com a seguinte distribuicao: Relevo Plano (aptidao muito alta: 8.702,52 km 2 ou 55,15% da bacia em estudo), Relevo Suavemente Ondulado (aptidao alta: 4.489,16 km 2 ou 28,45%), Relevo Ondulado (aptidao moderada: 1.270,33 km 2 ou 8,04%), Relevo Fortemente Ondulado (baixa: 970,17 km 2 ou 5,74%), Relevo Montanhoso (restrito: 357,11 km 2 ou 2,26%) e Relevo fortemente montanhoso (inapta: 51,0 km 2 ou 0,32%). Palavras-chave: cerrado, avaliacao de terras, planejamento agricola, manejo de bacias hidrograficas, Sistemas de Informacao Geografica (SIG). ABSTRACT This work aimed to characterize the suitability for agricultural and forestry mechanization in the Urucui-Preto River Hydrographic Basin, state of Piaui, Brazil, in order to support the planning of use, interventions, soil management and environmental management for the study area. A terrain slope map was generated with use of ArcGIS 10.0 software by using the SRTM/DEM (Digital Elevation Model) basis, and processed and analyzed from the interpretation and attribution of slope classes in degrees in order to indicate areas with restricted suitability for mechanization. A map of soil types was generated in order to assist in interpreting the capacity to mechanization according to soil parameters, and from that we obtained the final map of suitability for mechanization in the basin studied. Based on the results, classes of suitability to mechanization of presented the following distribution: Flat Relief (very high suitability: 8,702.52 km 2 or 55.15% of the basin under study), Slightly Undulating Relief (high suitability: 4,489.16 km 2 or 28.45%), Undulating Relief (moderate suitability: 1,270.33 km 2 or 8.04%), Strongly Undulating Relief (low suitability: 970.17 km 2 or 5.74%), Mountainous Relief (restricted: 357.11 km 2 or 2.26%) and Strongly Mountainous Relief (inapt: 51.0 km 2 or 0.32%). Keywords: cerrado, land evaluation, land use planning, hydrographical basins management, Geographic Information Systems (GIS). DOI: http://dx.doi.org/10.14583/2318-7670.v04n04a09 Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri",sans-serif; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-fareast-language:EN-US;}