FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico / O atual quadro de exploraÃÃes desordenadas e esgotamento dos recursos naturais comprometem diretamente a dinÃmica dos sistemas ambientais, refletindo-se de maneira diversificada em todo territÃrio nacional. Em regiÃes com caracterÃsticas climÃticas mais rigorosas, como no caso do semiÃrido cearense, o uso e ocupaÃÃo desordenados vÃm ocasionando problemas diversos que comprometem a dinÃmica dos sistemas ambientais e a qualidade de vida da populaÃÃo. Partindo da necessidade de elaborar propostas de planejamento e gestÃo ambiental de municÃpios inseridos no semiÃrido, o presente trabalho foi realizado no municÃpio de Nova Russas, situado na porÃÃo centro-oeste do estado do CearÃ, na latitude 4Â42â24â S e longitude 40Â33â47â W, com Ãrea de 742,69 kmÂ, distante da cidade de Fortaleza cerca de 300 km. O municÃpio possui uma sÃrie de problemas como: poluiÃÃo, contaminaÃÃo e ocupaÃÃo desordenada das planÃcies fluviais, utilizaÃÃo de tÃcnicas de manejo do solo inadequadas, dentre outros. A pesquisa foi efetivada no municÃpio a partir do levantamento detalhado das caracterÃsticas naturais, socioeconÃmicas e culturais, embasada nos procedimentos teÃricos e metodolÃgicos da Geoecologia das Paisagens. A visÃo sistÃmica e integrada viabilizou a elaboraÃÃo de mapas temÃticos na escala de 1:170.000 e de uma proposta de zoneamento geoecolÃgico e funcional. Para o municÃpio de Nova Russas, a pesquisa surge como um importante documento contÃm um levantamento histÃrico, socioeconÃmico e ambiental, e apresenta os principais problemas ambientais que comprometem a disponibilidade dos recursos naturais e se refletem na economia local. Sendo assim, a efetivaÃÃo da pesquisa buscou estabelecer diretrizes que conduzam o municÃpio a uma sustentabilidade geoecolÃgica a partir de um processo de ocupaÃÃo do espaÃo ambientalmente equilibrado. / The current picture of disordered holdings and depletion of natural resources directly compromising the dynamics of environmental systems, reflecting themselves on a diverse nationwide. In regions with more stringent climate haracteristics, such as the semi-arid region of CearÃ, with a prolonged dry season and a rainy concentrated in a short period of the year, coupled with geological and geomorphological factors that influence the availability of the region's natural resources, exploitation, the use and occupation are disordered causing various problems that compromise the dynamics of environmental systems and quality of life. These factors together with local economic development policies that, in most cases, are not compatible with the social and environmental reality of the area, continue to delay the development of certain areas because it does not consider the potential economic and environmental available in your territory. Starting from the need to prepare proposals for environmental planning and management of municipalities in semi-arid, the present study was designed to provide subsidies related to the actual economic and environmental study area chosen, the city of Nova Russa s, located in the portion midwestern state of CearÃ, in latitude 4 Â 42'24 "S and longitude 40 Â 33'47" W, with an area of 742.69 km Â, with average heights of 240 m, and from the city of Fortaleza about 300 km. Nova Russas presents a picture of evolution in terms of population, advancing one that comes with public policies for socio-economic sectors, cultural and environmental factors, the latter being the most affected in the process of urban expansion. The city has a number of environmental problems such: pollution, sprawl and pollution of the river plains, using techniques inadequate soil management, which accelerate erosion and cause loss of soil fertility, among others. With this framework, the research was accomplished in the city from the detailed survey of the natural characteristics, socioeconomic and cultural, based on theoretical and methodological procedures of Geoecology of Landscapes. A systemic and integrated vision of Geoecology allowed the elaboration of thematic maps in scale 1:170.000 and a zoning proposal geoecolÃgico functional and appropriate to the potential and limitations of the area, and you can also prepare an action plan and measures for integrated. In general, it is believed that the work presents itself as an important contribution to the municipal level, which can be used as a model to support the elaboration of proposals for environmental planning from the realization of zoning. For the city of Nova Russas, research emerges as an important document and contains a historical survey, socioeconomic and environmental issues, presents the main environmental problems that compromise the availability of natural resources and are reflected in the local economy. Thus, the effectiveness of the research sought to establish guidelines that will lead the council sustainability geoecolÃgica from a process of occupation of space environmentally balanced.

CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior / The watershed is understood as a complex system that integrates elements natural, socioeconomics and cultural. The objective of research was to assess the anthropogenic changes in the dynamics of landscape the River Basin SÃo JoÃo de Tiba-BA and its interference in the fragility of environmental systems. The basin of 178. 071 hectares, is inserted in the Region of Extreme South Bahia, which was incorporated into the "development" of economic and private megaprojects like cellulose of extensive territorial occupation that this region has experienced, resulting in severe exploitation of natural resources and intense changes in the landscape. Thus, to understand the natural dynamics and the processes of land use and occupation were performed analysis physiographic, morphometric, socioeconomic diagnosis and characterization of the evolution of the use of land, identifying the major impacts of space appropriation process. To meet the proposed objectives, was adopted the scale 1:100.000. The research involved the use of cartographic techniques and remote sensing, through GIS. For this, we used radar image (SRTM and ASTER), and satellite images Landsat TM 5, information collected in fieldwork, and data socioeconomic nature. The data generation and preparation of maps was performed in SIG ArcGIS 10. The integrated analysis of the environment can be inferred that the area is characterized, mostly by plan relief of the Coastal Tablelands of Barriers Group, which originated evolved soils as Yellow Latosols, naturally covered by a rainforest that were gradually replaced. The basin comprises nine different environmental systems. The geo-environmental characteristics of the area were attractive for the development of the main forms of anthropism that changed the landscape and turned it into two types of scenarios: the of pasture and of eucalyptus. The use of land for pasture concentrates most of the arable land, and what else disrespects environmental legislation. The plantation of eucalyptus is agricultural use with the highest growth in the period analyzed, meanwhile, the remaining forest areas were reduced by 63%. The forms of land use practiced in the basin contributed to the increase in environmental degradation processes and, consequently, increasing its Environmental Fragility. It is hoped that the research can collaborate with the area of systems analysis in watersheds as a subsidy to the Environmental Planning. / A bacia hidrogrÃfica à entendida como um sistema complexo que apresenta de forma integrada elementos naturais, socioeconÃmicos e culturais. O objetivo da pesquisa foi verificar as mudanÃas antropogÃnicas na dinÃmica da paisagem da Bacia HidrogrÃfica do Rio SÃo JoÃo de Tiba-BA e sua interferÃncia na fragilidade dos sistemas ambientais. Trata-se de uma bacia de 178. 071 ha, inserida na RegiÃo do Extremo Sul da Bahia, a qual foi incorporada ao processo de âdesenvolvimentoâ, de megaprojetos econÃmicos e privados de extensiva ocupaÃÃo territorial como a celulose, resultando em acentuada exploraÃÃo de recursos naturais e intensas transformaÃÃes na paisagem. Assim, para entender a dinÃmica natural e os processos de uso e ocupaÃÃo da terra foram realizadas anÃlises fisiogrÃficas, morfomÃtricas, diagnÃstico socioeconÃmico, caracterizaÃÃo da evoluÃÃo dos usos do solo e mapeamentos sÃntese da fragilidade ambiental, identificando os principais impactos decorrentes do processo de apropriaÃÃo do espaÃo. Para atender os objetivos propostos, adotou-se a escala de 1:100.000. A pesquisa envolveu o uso de tÃcnicas cartogrÃficas e sensoriamento remoto, atravÃs do geoprocessamento. Para tal, utilizou-se imagens de radar (SRTM e ASTER), imagens de satÃlite do sistema Landsat 5 TM, informaÃÃes coletadas em trabalhos de campo, e informaÃÃes de natureza socioeconÃmica. A geraÃÃo dos dados e confecÃÃo dos mapas foi realizada no SIG ArcGis 10. A anÃlise integrada do meio fÃsico permite inferir que a Ãrea à caracterizada, em sua maior parte, pelo relevo plano dos Tabuleiros Costeiros do Grupo Barreiras, que deram origem a solos evoluÃdos como os Latossolos Amarelos, recobertos naturalmente, por uma mata Ãmida que foi paulatinamente substituÃda. A bacia comporta nove sistemas ambientais diversos. As caracterÃsticas geoambientais da Ãrea foram atrativas para o desenvolvimento das principais formas de antropismo que modificaram a paisagem e a transformaram em dois tipos de cenÃrios: o do pasto e o do eucalipto. O uso do solo com pastagens concentra a maior parte das terras agricultÃveis, e o que mais desrespeita a legislaÃÃo ambiental. A silvicultura à o uso agrÃcola que apresentou maior crescimento no perÃodo analisado, enquanto isso, as Ãreas com remanescentes florestais foram reduzidas em 63%. As formas de uso da terra praticadas contribuÃram para o aumento dos processos de degradaÃÃo ambiental e, consequentemente o aumento da sua fragilidade. A pesquisa contribui com a Ãrea da anÃlise sistÃmica em bacias hidrogrÃficas como subsÃdio ao Planejamento Ambiental.