Navegando por Assunto "Planejamento ambiental"

Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Análise da influência do uso e ocupação da terra na concentração de sólidos em suspensão em reservatório hidrelétrico com o uso do sensoriamento remoto
(Universidade Federal do Pará, 2022-07-09) SOUZA, Fabíola Esquerdo de; SOARES, Carlos Benedito Santana da Silva; http://lattes.cnpq.br/9153957633685323; ISHIHARA, Júnior Hiroyuki; http://lattes.cnpq.br/3498874642887006; https://orcid.org/0000-0002-0081-7913
The use of remote sensing in reservoir sediment monitoring is important for temporal spac knowledge of sediment deposition in dam structures. In this context, this research was developed in the hydrographic basin that covers the Tucuruí HOU reservoir, in which suspended sediment concentration data from the M1 monitoring station located at 2 km upstream of the dam were acquired, and were integrated into the analyses to understand the relationship between the responses of satellite images and field measurements. Sediment analyses were performed with 14-year time series of MODIS images, composed of 8 days. Surface reflectance estimates were calculated using simplinear regression and coefficient of determination (R2). For the use and occupation of the land of the hydrographic basin, a temporal analysis of Landsat-5, Landsat-8 OLI/TIRS images was performed. Next, the land use and occupation were related to water quality analyses of stations upstream 1 (M1), Amount Repartimento (MR) and Montante Pacurui (MP). The results show that the calibration curve generated the linear regression equation with good fit for MI monitoring station, presenting efficiency in the data estimated by reflectance through this model. The analyses of land use and occupation show that over the years there was a reduction in forest formation and at the same time pasture growth occurred. In relation to water quality, the impacts caused by anthropic actions have negative influences. Thus, it is possible to observe the relevance of the use of remote sensing techniques, geoprocessing and geotechnologies, as instruments that help in the planning of land use and occupation, in the analysis of water quality and management of water resources in reservoir regions, since these technologies enable greater spatial scope of the analyses with lower costs.
Acesso aberto (Open Access)
Diagnóstico ambiental da Reserva Extrativista Marinha de São João da Ponta: subsídios para o planejamento ambiental
(Universidade Federal do Pará, 2013) FERREIRA, Welington Morais; PIMENTEL, Márcia Aparecida da Silva; http://lattes.cnpq.br/3994635795557609
The environmental assessment and analysis of the suitability of the occupation permit identification of the most critical areas in the level of degradation is extremely relevant for the establishment of conservation measures, conservation and recovery. This study aimed to conduct an environmental diagnosis of Marine Extractive Reserve of St. John the tip through GIS techniques. Analyses based on information that make up the landscape of CU, especially in the use and occupation of land and the relationships between some aspects considered in the work. The analyzes included aspects related to the use and occupation of land , the region's climate , soil composition and its geomorphology , water resources , fauna and flora , the conditions of life in the communities , the risk of erosion. It was found that the basin water resources are being degraded , the use and land cover still has degraded areas and a process of fragmentation is occurring in the landscape , especially in the vicinity of CU. Potential sources of landscape degradation of mangroves have been identified in the vicinity of the unit , compromising the quality and quantity of the supply of resources . Urbanization is the most influential factor on the CU because it exerts a pressure on the EXRES . Irregular situation with respect to legislation and environmental preservation were detected in the basin . In most of CU along watercourses use and land cover have an advanced stage of regeneration , which refers to the process of occupation of northeastern Paraense . Ecological corridors linking the upland forests are degraded and inadequate , especially for not meeting the environmental function determined by the Forest Code , predominating in these areas pastures . An efficient environmental control policy is needed for these areas, and environmental planning appropriate to guide the occupation surrounding the CU and the adoption of measures for the recovery of the same.
Acesso aberto (Open Access)
Subsídios ao planejamento ambiental da Bacia Hidrográfica do rio Benfica, RMB – PA/Brasil
(Universidade Federal do Pará, 2013) PAUNGARTTEN, Sâmela Patrícia Lima; BORDALO, Carlos Alexandre Leão; http://lattes.cnpq.br/1253955182585852
The hydrographic basin of Benfica’s river, located in Belém-PA metropolitan’s region, is presented as an important area for observation of the alteration processes of the landscape, because this unit, in the last thirty years, went through significant transformations, imposed by the dynamics and use of the land. Initially, it presented a rural dynamic and nowadays it is consolidating itself as an urban area, which is being aggravated by the emergence of the problems associated to the growing and development of the cities: sanitation, housing and use of the hydric resources. Front this context, this dissertation has the goal of subsidizing the environmental planning and management of this hydrographic basin. In terms of methodology, it was sought the elaboration of the inventory, environmental diagnosis, prognosis and proposes. In an specific manner, it was executed the analysis of the information, which was referred to the physics’ environment, history of the municipal occupation that includes the hydrographic basin of Benfica’s river, socioeconomic conditions and basic sanitation of the population living in the basin, dynamics of the use and coverage of the soil among the years of 1984, 1993, 1999 and 2009, main environmental problems and environmental politics’ force. The main obtained results show an expressive urban expansion in the hydrographic basin of Benfica’s river in the last 30 years, with different environmental problems, unaccompanied of effective politics of territorial planning. This dynamics totals on a physical unit characterized, especially, by low amplitudes and altimetric slopes, with sedimentological processes over the erosicional. The integration of the physical data of the basin allows the partitioning of itself in two sectors (A and B), characterized, respectively, for presenting bigger environmental problems initiated by the consolidation of the urban sector; and other for having the biggest index