scholarly journals Mapeamento da Cobertura Vegetal e dos Níveis de Degradação das Terras do Município de Parari-PB (Mapping of Vegetation Cover and Levels of Land Degradation in the City of Parari-PB)

2013 ◽  
Vol 5 (5) ◽  
pp. 1203
Author(s):  
Ruy Souza de Santana ◽  
Marx Prestes Barbosa ◽  
Paulo Roberto Megma Francisco ◽  
Francisco de Assis Da Siveira Gonzaga

Este trabalho teve como objetivo realizar uma avaliação do processo da desertificação no município de Parari, através do estudo dos níveis de degradação das terras utilizando técnicas do sensoriamento remoto e sistema de informação geográfica. Na metodologia de trabalho de campo registrou-se o panorama atual dos níveis de degradação das terras pelo método de etapas lógicas e sistemáticas. Utilizou-se do programa SPRING e como resultados foram gerados os mapas digitais dos níveis de degradação das terras e da distribuição da cobertura vegetal. Foi constatado que o nível de degradação muito baixo identificado ocupa 9,28 km2, o nível de degradação baixo ocupa uma área de 7,73 km2, degradação moderado com 43,26 km2, o nível de degradação grave ocupa uma área de 63,98 km2 e o nível de degradação muito grave ocupa o menor percentual, 3,84% para 4,91 km2 do território.Palavras-chave: Sensoriamento Remoto, Desertificação, Semiárido. Mapping of Vegetation Cover and Levels of Land Degradation in the City of Parari-PB ABSTRACTThis study aims at evaluating the process of desertification in the city of Parari, by studying the levels of land degradation using remote sensing techniques and geographic information system. In the methodology of fieldwork there was the picture of current levels of land degradation by the method of logical and systematic steps. We used the SPRING program and how results were generated digital maps of the levels of land degradation and distribution of vegetation cover. It was found that the very low level of degradation identified occupies 9.28 km2, the low level of degradation occupies an area of 7.73 km2, 43.26 km2 with moderate degradation, the level of serious deterioration occupies an area of 63, 98 km2 and the level of degradation very serious occupies the lowest percentage, 3.84% to 4.91 km2 of the territory.Keywords: Climate Indices, dry and wet periods, Climate Variability.

Author(s):  
A. A. Mohammedshum ◽  
M. A. Gebresilassie ◽  
C. M. Rulinda ◽  
G. H. Kahsay ◽  
M. S. Tesfay

Identifying solid waste disposal sites and appropriately managing them is a challenging task to many developing countries. This is a critical problem too in Ethiopia in general and in Wukro town in particular. The existing site for Wukro town is not sufficient in its capacity and it is damaging the environment due to its location, and the type of waste dumped, while the surrounding area is being irrigated. Due to the swift expansion and urbanization developments in Wukro town, it badly needs to develop controlled solid waste dumping site to prevent several contamination problems. This study was conducted first, to assess the existing waste management strategies in Wukro town; and second, to find out the potential waste disposal sites for the town, using GIS and Remote Sensing techniques. The study exploited the Multi-Criteria Evaluation (MCE) methods to combine necessary factors considered for dumping site selection. The selected method also uses various geographical data including remote sensing data, with GIS spatial analysis tools. Accordingly, site suitability maps for each of the factors were developed in a GIS environment. Results indicate that 12 dumping sites were appropriate and they were further ranked against their suitability in terms of wind direction, proximity to settlement area and distance from the center of the town. Finally, two sites are the best suitable for dumping site. This study indicated that the application of Geographic Information System and Remote Sensing techniques are efficient and low cost tools to study and select appropriate dumping site so as to facilitate decision making processes.


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