Geoprocessamento aplicado na distribui����o espacial da capacidade de uso de uma microbacia

The present study aimed to show the spatial distribution of the Rochas watershed (Avar��-SP, Brazil) soil use capacity using the Idrisi geographical information system in order to contribute to a better territorial organization and the planning of the appropriate soil occupation. The obtained results using this methodology showed that most of the Rocha watershed areas are from the following groups: dystrophic yellow-red latosol (36.64%), eutroferric and distroferric red latosol (30.30%) with sandy texture. There was a predominance of areas with slope classes of 0-12%, plain to wavy relief (61.37% of the watershed area) showing that these areas are appropriate for annual culture plantations with wide use of machinery. Most of these areas were classified as class IV (73.79%) as to use capacity. In the studied area the following subclasses of land use capacity were found: IIe, s; IIIe; IVe; IVs; IVe,s; VIe and VIIe. Capacity subclasses IVe; IVe,s; IVs and Vie were the most significant because they are areas that can be used for agriculture but subject to severe soil impoverishment if there are no special care mainly for annual cultures. The Idrisi geographical information system was efficient to determine soil use capacity of the Rocha's watershed showing that the use of geoprocessing tools makes data analysis easier and faster, allowing digital data storage for future analysis uses mainly for territorial planning and environmental studies.

Compara����o de m��todos para determina����o da estabilidade de agregados por vias seca e ��mida em diferentes sistemas de uso e manejo do solo

The purpose of the work is to evaluate the stability by dry and humid of theaggregate in different systems or the use and management in Argissolos: agricultural, pasture and torest utilization. This work was realized in agricultural property, in Anhumas city, SR Several analyses including percentage of the aggregate (by way of dry and humid); the weighted mean diameter of the aggregate calculation and statistic analysis. Conclusion: the organic matter content of the A horizon of the soil under forest is 64 % more than the soil under pasture and 79 % more than the soil under annual crop; the WMDA of the aggregate obtained by dry and humid ways of the horizon A and its mean value for the soil decrease in the following sequence: PVAd - forest > PVe -pasture > PVd - annual culture, respectively, with the following values: 1.33560 and 1.445496 (D), 2.81114 and 2.351380 (H); 0.66748 and 1.011830 (D); 2.79642 and 1.624250 (H); 0.32468 and 0.993775 (S), 1.25808 and 0.983135 mm (H); the two methods are equally sensitive to reveal the effect of the soil use and management; the organic matter provides additional stability to the aggregates submitted to humid sieving and clay to the dry sieving: the WMDA obtained by dry and humid ways are statistically different for the soil profiles.

Geoprocessamento e sensoriamento remoto aplicado na determina����o da aptid��o agr��cola de uma microbacia

Soil use for the development of activities as agriculture and livestock has been causing great alterations in the environment, mainly when these are practiced intensively, disrespecting the fragility and aptitude of the natural resources. Therefore, it is essential that the planning of the agricultural activities is done, taking into consideration the several environmental criteria involved in the decision-making process. Thus, this study aimed to analyze the agricultural aptitude classes of lands from a watershed through geographical information system (GIS). The Arroio Ajuricaba watershed is located in the Municipality of Marechal C��ndido Rondon - PR among the coordinates UTM 787309m E and 793892m E; 7275026m N and 7281310m N, in the Spindle 21, presenting an area of 1681ha. Soil maps, in semi detail scale, was the digital cartographic base used. The results allowed to conclude that 42.41% of the basin presented a good aptitude for farming in handling level of high technology (handling level C), regular aptitude for B, and restricted aptitude for A [class 1(a)bC] and that 12% of the area had regular aptitude for farming in the three handling levels (class 1abc). The watershed lands (14.24%) presented regular aptitude for farming in handling level C, restricted aptitude for B, and inapt for A [class of aptitude 2(b)c]; 15.85% presented good aptitude for planted pasture (class 4P) and 12.21% were considered without aptitude for agricultural use (class 6). We can say that 71.94% of the lands has aptitude for farming, although they present different degrees of limitations that request different treatments for its conservation.

Sistema de informa����es geogr��ficas aplicado �� espacializa����o da capacidade de uso da terra

This research aimed to study land use capability classes in Prat��nia, S��o Paulo State, Brazil, by using the Geographic Information System (GIS), in order to find out the appropriate planning system for soil use. The watershed covers an area of 21,773.61 ha and is located among the coordinates 22��44'48S and 22��52'17S and 48��38'21W and 48��48'07W. The land use capability map was made from the slope and soil maps, based on the features of each kind of soil and the land use capability table for class assessment. It was possible to conclude that IIIs was the most significant subclass. Slope classes from 0% to 20% were present in more than 97% of Prat��nia, being the plane areas the most representative ones (55%). GIS showed to be an excellent tool for determining land use capability, because the geoprocessing use facilitates and activates the digital data crossing, allowing its storage for future environmental planning.

SIG - SPRING aplicado na determina����o da capacidade de uso das terras da microbacia do Ribeir��o Pouso Alegre - Ja�� (SP)

A popula����o mundial vem sofrendo, cada vez mais, as conseq����ncias das agress��es efetuadas pelo homem ao meio ambiente, principalmente quanto �� ocupa����o e uso inadequado das terras, o que ocasiona empobrecimento e depauperamento do solo, influenciando na qualidade e disponibilidade de ��gua, levando �� destrui����o das reservas florestais. Assim, �� necess��ria a implanta����o de pol��ticas p��blicas, que contemplem o desenvolvimento econ��mico, urbano, rural e social de uma regi��o, preservando os recursos naturais para futuras gera����es. A bacia em estudo est�� localizada entre as coordenadas UTM 764942; 7546214 e 741816; 7534759, com uma ��rea de 14699,7ha. Este trabalho visou definir as classes de capacidade de uso de terra da microbacia do Ribeir��o Pouso Alegre - Ja�� (SP) atrav��s do Sistema de Informa����es Geogr��ficas - SPRING. A carta de capacidade de uso da terra foi elaborada a partir do cruzamento das cartas clinogr��fica e de solo, que foram elaboradas pelo SIG Spring, e o cruzamento de dados foi feito atrav��s do LEGAL - Linguagem Espacial para Geoprocessamento Alg��brico. Os resultados mostraram que a microbacia �� constitu��da essencialmente pelas classes II e III e o SIG-SPRING permitiu atrav��s dos seus m��dulos discriminarem e quantificar as ��reas das classes de terras, declive e capacidade de uso da terra rapidamente.

Propriedades f��sico-h��dricas, desenvolvimento radicular e produtividade da soja em dois tipos de manejos de solo

The soybean culture is part of crop rotation used by irrigators from the southwestern region of S��o Paulo State that perform no-tillage soil management as a form of sustainable soil use. The objective of this work was to evaluate the effect of this conservationist practice on physicalhydric properties, soil compaction, root development, and soybean culture production components in relation to the conventional management. The experiment was conducted at the Buriti-Mirim Farm, Angatuba, SP, in Brazil, using an area irrigated by a center pivot system divided into two types of soil management: conventional and no-tillage. Although the no-tillage management presented higher soil density, lower water available and lower soil resistance to penetration, both soil managements showed no difference in relation to root development.

Subst��ncias h��micas e agrega����o de um latossolo vermelho eutrof��rrico sob diferentes usos e manejos

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Diagn��stico ambiental na sub-bacia do Ribeir��o Pouso Alegre com a utiliza����o de um sistema de informa����o geogr��fica

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Atributos f��sicos e mec��nicos do solo avaliados por processamento digital de imagem e ensaios de rotina

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Geoprocessamento na identifica����o de ilhas de calor e influ��ncia do uso e ocupa����o do solo na temperatura aparente da superf��cie no munic��pio de Botucatu/SP

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Preven����o e controle da eros��o urbana: bacia do C��rrego do Limoeiro e bacia do C��rrego do Cedro, munic��pios de Presidente Prudente e ��lvares Machado, SP

P��s-gradua����o em Geoci��ncias e Meio Ambiente - IGCE

Fragilidade ambiental e qualidade dos solos em duas bacias hidrogr��ficas de uso rural, em Ibi��na, SP

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Determina����o do conflito de uso e ocupa����o do solo em ��reas de preserva����o permanente da microbacia do Ribeir��o ��gua -Fria, Bofete(SP) visando a conserva����o dos recursos h��dricos

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico (CNPq)

Escoamento superficial e risco de eros��o do solo na sub-bacia Jardim Novo Horizonte, Munic��pio de Ilha Solteira-SP

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior (CAPES)

Caracteriza����o do meio f��sico em bacias hidrogr��ficas com suportes de sensoriamento remoto e geoprocessamento

P��s-gradua����o em Geografia - IGCE