Navegando por Autor "Martins Junior, Paulo Pereira"

Agora exibindo 1 - 2 de 2

Análise do impacto sobre o bioma cerrado na área do interflúvio entre as bacias dos rios Paracatu e Paranaíba.
(2011) Carneiro, João Álvaro; Martins Junior, Paulo Pereira; Oliveira, Leandro Cosme de; Vasconcelos, Vitor Vieira
Apresenta-se análise das transformações ocorridas no uso do solo, com ênfase na cobertura vegetal nos períodos de 1964, 1989 e 2005, na área de interflúvio entre as Bacias dos Rios Paracatu e Paranaíba (Minas Gerais, Goiás e Distrito Federal). São apresentados os resultados do mapeamento por classes de cobertura vegetal, incluindo as alterações antrópicas nos períodos mencionados. Foram estabelecidas classes de declividade com as respectivas áreas e percentuais para cada tipologia de vegetação nativa e uso antrópico, no sentido de se analisar a ocupação dos espaços pelos diferentes usos em relação à topografia do terreno. Os resultados apontam para uma alteração antrópica significativa, com intensa fragmentação da vegetação nativa.
Analysis of spatial–temporal patterns of water table change as a tool for conjunctive water management in the Upper Central Plain of the Chao Phraya River Basin, Thailand.
(2014) Vasconcelos, Vitor Vieira; Koontanakulvong, Sucharit; Suthidhummajit, Chokchai; Martins Junior, Paulo Pereira; Hadad, Renato Moreira
A sustainable strategy for conjunctive water management must include information on the temporal and spatial availability of this natural resource. Because of water shortages in the dry seasons, farmers on the Upper Plain of the Chao Phraya River basin, Thailand, are increasingly using groundwater to meet their irrigation needs. To evaluate the possibilities of conjunctive water management in the area, the spatial–temporal changes in the water table of the Younger Terrace Aquifer were investigated. First, a regional geomorphological map based on field surveys, remote sensing and previous environmental studies was developed. Then, the well data were analyzed in relation to rainfall, streamflow, yield and pumpage, and the data were interpolated using geostatistical techniques. The results were analyzed via integrated zoning based on color theory as applied to multivariate visualization. The analysis results indicate areas that would be more suitable for groundwater extraction in a conjunctive management framework with regard to the natural hydrogeological processes and the effects of human interaction. The kriging results were compared with the geomorphological map, and the geomorphological areas exhibit distinct hydrogeological patterns. The western fans exhibit the best potential for the expansion of conjunctive use, whereas the borders of the northern fans exhibit the lowest potential.