Mapeamento, erodibilidade e tolerância de perdas de solo na sub-bacia do Ribeirão das Perobas

The land use conservation planning requires knowledge of the soil characteristics, natural susceptibility to erosion and the soil loss limit. In this context, the objectives of this study were to perform a detailed soil survey of Ribeirão das Perobas watershed, located in Santa Cruz do Rio Pardo, São Paulo State and to determine and map the erodibility and soil loss tolerance of the soil classes found in the survey. The following techniques were used to perform the detailed soil survey: photopedology, field sampling, physical analysis, chemical analysis, and morphological description of the soil samples and profiles. The erodibility was determined by the methods described by Denardin (1990) and Mannigel et al. (2002), and the determination of soil loss tolerance followed the methodology of Mannigel et al. (2002). The results of erodibility determined by the methodology of Denardin (1990) were not discrepant and they did not distinguish soils that are known to have different susceptibility to erosion., w\Whereas, using the methodology of Mannigel et al. (2002), very high or very low erodibility values were observed in soils with extreme contents of sand silt or clay. The most influent variable to the soil loss tolerance results was the correction factor for the textural gradient of clay between soil horizons.

Assoreamento de lago integrante da sub-baciado Córrego da Cascata, Botucatu, SP: implicações morfométricas

The watershed is considered a unit of territorial study, planning and land management, and is molded by the local geologic conditions and climate. Thus, this study aimed to assess the morphometric features of the subwatershed of Cascata Stream, in Botucatu (SP), and their implications for the siltation process in a lake. The assessment included indexes generated from data calculated by means of a digitalized cartographic basis georeferenced on the 1:10,000 scale using the software AutoCad map 2004. The software Quantum GIS 1.8 was also employed to generate the digital elevation model (DEM) and the map of declivities which led to the mean declivity (Dm) of the subwatershed. According to the indexes form factor (Kf), sinuosity (Is), circularity (Ic) and compacity coefficient (Kc), the subwatershed had elongated form, low propensity to floods and rapid flow. The draining density (Dd) and relief ratio (Rr) indicated more efficient mean drainage, favoring higher desiccation and mean erosive stage. The roughness coefficient (Cr) indicated that this subwatershed is suited to agriculture. The anthropic intervention at the watershed dividing line is the major factor for sediment carrying in the lake and compromises not only the landscape beauty, but also the aquatic life of this ecosystem.

Planejamento do meio físico a partir de uma abordagem da técnica de capacidade de uso da terra na sub-bacia dso Rio das Pedras - Itatinga - SP

The study aimed mapping of the land use capacity classes for the Rio das Pedras watershed, Itatinga-SP in order to provide another mechanism of environmental planning for the studied area. It was used 1:10,000 topographic letters for the slope map generation which was overlaid with the studied area soil map. It was applied the judgment table criteria method, for generation of land use capacity map of the studied area. It were identified the following results: First, class III with constraints in relation of low fertility and restrictions about erosion risks on high slope areas. Second, class VI with the same characteristics of class III however with the presence of an aggravating factor of sand texture in all horizons, resulting in high risks of erosion events, especially in high slopes areas, and contamination by pollutants due the high soil permeability. Conclusions: It was verified that the more critical regions for land use capacity classes were VIs and mainly VIes class. The last one has more high relief areas and the presence of Neossolo Quartzarenico soil, with a big erosion propensity. The land use capacity map allow making different decisions for each region of the watershed respecting their individual characteristics.

Quais são os fatores que estruturam as comunidades de girinos no pantanal em diferentes escalas e sub-regiões?

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Áreas de preservação permanente (APP) na sub-bacia hidrográfica do córrego do Marimbondo, Jales (SP): um estudo das condições ambientais

This work aimed to carry out a study of the environmental conditions of the Permanent Preservation Areas (PPAs) in the sub-basin of Marimbondo Stream in the city of Jales (SP), through remote sensing techniques and taking as the basis Brazilian environmental legislation, the Forest Code Federal Law Nº 12,651/2012. Permanent Preservation Areas are inserted intrinsically improved conditions in the quantity and quality of water in the areas of springs and along water bodies in rural properties. Therefore, we also carried out studies on the new Forest Code compared to the old Federal Law Order no. 4771/1965 and the observation of its application in the area of sub-basin as well as carrying out the simulation. The results of this research allowed toverify the need for direct implementation of the monitoring measures with the Forest Code, and this water management tool in Brazil, which will ensure sustainable management practices of land use and land cover, with direct benefits to water production, mainly for public supply. Also there was a greater need for involvement by the public actors, the Basin Committee of the São José dos Dourados and the municipal government of Jales, in order to truly act aimed at the protection and maintenance of the water body Stream Wasp

Desenvolvimento de software para avaliação dos desempenhos hidráulico e econômico de pivôs centrais

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Estratigrafia do Andar Alagoas na sub-bacia do Tucano Norte, Bahia

Pós-graduação em Geociências e Meio Ambiente - IGCE