Baptista De Souza D.D.,Engevix Engineering |
Muller A.S.,Engevix Engineering
International Journal on Hydropower and Dams | Year: 2013
Since the concession was awarded for the 135 MW Sao Roque hydro scheme in southern Brazil and the first feasibility studies were completed, a number of refinements have been made to the design and layout of the main structures, which have led to technical and economic advantages.
Xavier L.V.,Engevix Engineering |
Foes P.A.,Engevix Engineering
International Journal on Hydropower and Dams | Year: 2010
Plans for the 400 MW, Lower Arun CFRD project, to be developed in eastern Nepal, are discussed. Nepal has approximately 83 000 MW of hydropower potential, half of which is estimated to be economically feasible for development. Braspower (a subsidiary of Engevix) recently conducted a feasibility study for the Lower Arun hydroelectric project. The study explored an optimized layout and potential installed capacity for the project, located in the lower Himalayan range, Nepal. The study was developed by the technical staff of Engevix at its head office in Brazil, with the support of Nepalese staff for field activities, including topography, geology and environmental assessment. The layout, with a CFRD, a long headrace tunnel and an underground powerhouse, is appropriate for the site conditions and is not likely to represent any special difficulties for implementation.
Salles R.,Engevix Engineering |
Palu M.,Engevix Engineering |
Carneiro Da Cunha J.,Engevix Engineering
International Journal on Hydropower and Dams | Year: 2011
The Cambambe hydroelectric schemes now going ahead on the Kwanza river, Angola, will eventually more than double the installed hydro capacity of the country. Cambambe 1, constructed in the 1960s, is undergoing rehabilitation and upgrading, and a new 700 MW scheme, Cambambe 2 has had its basic design finalized, the executive design started, and civil works now going ahead. Both developments are described here, with emphasis on hydrological and hydraulic aspects, including the hydraulic scale model studies currently underway for the structures, particularly for the sluiceway of Cambambe 1.
Bird frugivory and seed germination of Myrsine umbellata and Myrsine lancifolia (Myrsinaceae) seeds in a cerrado fragment in southeastern Brazil [Frugivoria e germinação de sementes de Myrsine umbellata e Myrsine lancifolia (Myrsinaceae) por aves em um fragmento de Cerrado no sudeste do Brasil]
Guerta R.S.,Federal University of Sao Carlos |
Lucon L.G.,Federal University of Sao Carlos |
Motta Jr. J.C.,University of Sao Paulo |
Vasconcellos L.A.S.,Engevix Engineering |
de Figueiredo R.A.,Anhanguera
Biota Neotropica | Year: 2011
Birds are known to be important dispersers of plants, since the passage of seeds through the digestive tract often has a positive influence on germination percentage and speed. In this study, proportions of germination in different substrates were compared between Myrsine (Myrsinaceae) seeds collected manually and those ingested by birds. The guilds of birds that fed on M. umbellata and M. lancifolia were identified and comprise 24 and 12 species, respectively. A higher germination proportion was found among seeds defecated by birds and sowed in the study area. The study also found differences between the guilds of frugivores in both synchronopatric species. Therefore, we suggest that M. umbellata and M. lancifolia are important food sources by birds that play a positive influence for enhance germination of Myrsine.
Raphael Leal J.,Engevix Engineering |
Antunes Ferreira J.,Engevix Engineering |
Da Silva Schmidt F.,Engevix Engineering |
De Oliveira Germano E.,Engevix Engineering
International Journal on Hydropower and Dams | Year: 2012
The Misicuni multipurpose project, now under way in Bolvia, has been designed to allow for flexibility in execution, reduced risk of seismicity and various advantages for the schedule, based on low cost and simple construction technology. This paper describes the main characteristics of the project, with emphasis on features which are unique to Misicuni.