946 resultados para Environmental impacts.


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pesticids are chemical products used to control plagues (animal and vegetable) and plant diseases. Due to the process of automation occurred in the agriculture in 1960-1970, the agrotoxics began to be largely used in Brazil. Their physical-chemical proprieties, as well as the frequency of use, form of application, environmental biotic and abiotic characteristics and climatic conditions will determine their environmental destination. These variables will define the spectrum of environmental impacts and human health problems caused by the agrotoxics. The human health impacts might be acute or chronic, mainly upon neurological, reproductive and respiratory process. In the environment, the agrotoxics cause transformations and modifications in biota, water, soil and other ecosystems. To make farmworkers aware of alternatives to massive use of agrotoxics is the guarantee for an agriculture development more sustainable, without disorders in human health and in environment

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Cage aquaculture in hydroelectric reservoirs has great potential for expansion in Brazil, but there are concerns of negative environmental impacts. The environmental sustainability of cage culture depends on hamornization between farming practices and the hydrological peculiarities of the site. Mass balance modeling can estimate the amounts of nutrients that can be loaded without triggering eutrophication and resulting maximum allowable production volume. Careful climate zoning can also assist proper siting.

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In the wake of current global image involving environmental impacts, the use of wind power has had a remarkable growth in recent years as a technique for generating electricity. In fact, it is a source featuring strong dissemination of technology which provides decrease in costs and a greater access to low-income electricity. PROINFA (Incentive Program for Alternative Energy Sources) promotes a greater diffusion of new technologies for power generation, in particular wind-produced. Due to such a scenario on the exploitation of such energy source, current analysis discusses strategies for the development of domestic wind technology and the implications for electricity-lacking rural areas. Analysis shows a similar behavior between rural populations lacking electricity and the amount of potential energy available in the region. It is expected that this assay will contribute towards the establishment of public policies for wind-energy parks on rural farms in the North and Northeast regions of Brazil.

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The morphometric study in watersheds is a key part to managing watersheds, because from the morphometric indices can determine the risks and potential of each watershed and assess environmental impacts on them generated mainly by human activities. This study aimed to characterize the watershed of the river Verissimo, located in the municipality of Verissimo - MG, analyze morphometric indices and propose how best to use the soil to minimize erosion impacts to resources hídricos.Foi used digital charts 1:100,000 scale and AutoCAD software for the quantification of vector data. The watershed has an area of 146.055 km2 , 55.902 km perimeter. According to the morphometric indices is considered 5th order, highly branched, slightly elongated format of little risk to floods occur, its main channel corresponds to 28.541 kilometers and has undulated, with an average slope of 8.59%. Through the results of morphometric indices and roughness coefficient, shows the potential of watershed land use on pastures for livestock, and soil conservation practices and water to minimize the impacts of erosion and contamination of water resources.

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The misuse of land by man and is causing serious problems to the environment, resulting in ecological imbalance and depletion of natural resources, especially when it comes to areas of permanent preservation, that ecosystems are essential for balance and water conservation importance . Conflicts of land use is a major cause of silting of rivers and water bodies, causing significant losses in soil and decaying natural water resources both in quantity and in quality. Within this scenario, the planning becomes essential for the control of environmental impacts to the environment factor. This study aimed to evaluate land use conflicts in permanent preservation areas of the stream Água Fria watershed, Bofete (SP) using Geographic Information System and satellite image of LANDSAT - 5 of 2010, scale 1:50000. The results show that 51.16% of the permanent preservation areas of the watershed are conflicting, especially for pasture (88.94%) and reforestation with eucalyptus (11.06%). The GIS IDRISI Selva and Cartalinx along with GIS techniques demonstrated speed and efficiency in identifying, measuring and editing maps of land use, preservation and ongoing conflicts in areas of permanent preservation.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciências Ambientais - Sorocaba

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Engenharia Civil e Ambiental - FEB

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Pós-graduação em Química - IQ

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It's devised in this work the starting project for the implementation of a residential condominium, focused in the use of technics and technologies to attain sustainability, also stretching to the pilot project for the model house. It's highlighted the methods for exploitation and reuse of water, energy conservation and reduction of environmental impacts. The proposal is to demonstrate the possibility of the use of simple, but effective, ecology technics to make an environmentally sustainable and economically viable project. The main motivators for this work is the growing hydric crisis faced by São Paulo state and the unpaired importance of the sustainability concept as the fundamental term to surmount the challenge of supplying the needs of the current generation without jeopardizing the future of the next generations

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Pós-graduação em Geografia - IGCE

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Pós-graduação em Geografia - IGCE