Papers
Info
Para uma melhor gestão dos serviços de água
N/A
Year: 2001
Number Pages:
20-21.
Author(s): Alegre, H.
Editor: Revista Ambiente 21-Sociedade e desenvolvimento, secção Inovação científica e técnica . Nº 0, ano 1 e Nº 1, ano 1
Info
Sea water intrusion vulnerability mapping of aquifers using the GALDIT method
N/A
Year: 2001
Number Pages:
12 pp.
Author(s): Chachadi, A. G.; Lobo Ferreira, J. P. C.
Editor: Coastin e Modelling in Hydrogeology
Volume:
Number 4.
Info
Seismic hazard for the Central Group of the Azores Islands
Probabilistic seismic hazards maps have been prepared either for the archipelago of the Azores in general terms, or for the islands of the Central Group using updated seismic information for the region, including a revision of the earthquake catalogue for the period 1522-1998. Two different approaches were used: (i) a standard seismic source model and (ii) a semi-zonified source model based on spatially smoothed seismicity where no delineation of seismic sources is needed. Preliminary data point out that high PGA values were obtained for an area located to the west of the Central Group and for an area between Terceira and the São Miguel Islands. Deaggregation of hazard for some counties was evaluated and results are presented in terms of mean and modal values of magnitude and distance, showing that the main contributions to hazard in all counties are from close-in and not very severe earthquakes.
Year: 2001
Number Pages:
89-105pp.
Author(s): Carvalho, A. M.; Luísa Sousa, M.; Oliveira, C.S.; Nunes, J. C.; Campos Costa, A.; Forjaz, V.H.
: Bollettino di Geofisica Teorica ed Applicata
Editor: OGS
Volume:
Vol. 42, Nº 1-2.
Keywords: Azores; Probabilistic seismic hazards
Info
A sea wave study at the entrance of the Tagus estuary
N/A
Year: 2000
Number Pages:
19 p.
Author(s): Fortes, C. J. E. M.; Capitão, R.; Oliveira, F. S.; Covas, J. A.; Vaz dos Santos, M. A.; Sancho, F. E.
Editor: Revista Thalassas, International Journal of Marine Sciences. Vigo, Espanha, Novembro de 2000
Info
A Tidal Model of the Iberian Atlantic Shelf: First Results
Barotropic tides in the Iberian Atlantic shelf were simulated using a finite element model. The model was validated with data from twelve coastal gauges. The model reproduces the known behavior of semi-diurnal tides, which propagate northward as Kelvin waves, and predicts the existence of amphidromes in the Strait of Gibraltar for the diurnal waves. Model results were then used to specify boundary conditions for a tidal model of the Guadiana estuary. Results show that the spatial variability of tidal boundary conditions in estuarine models can be necessary for the accurate representation of the mixing between estuarine and ocean waters.
Year: 2000
Number Pages:
41-47.
Author(s): Fortunato, A. B.; Ferreira, J. S.; Oliveira, A.
Editor: Thalassas
Volume:
16.
Info
Aquifer recharge and evaluation of groundwater vulnerability to pollution
N/A
Year: 2000
Number Pages:
8-9 pp.
Author(s): Lobo Ferreira, J. P. C.
Editor: Coastin
Volume:
Number 2.
Info
Contribuição da tomografia sísmica na caracterização do maciço da zona da central de Venda Nova II
Na actual configuração do reforço de potência de Venda Nova II, a implantação da caverna da centralsitua-se no maciço granítico da Borralha a uma profundidade de 350 metros. A partir da superfícieforam executadas 4 sondagens verticais, profundas, com recuperação contínua de amostra. Entre essesfuros foram seguidamente realizados leques sísmicos para obtenção de tomografias sísmicas develocidade das ondas longitudinais em várias secções entre furos. As tomografias sísmicascontribuíram, em conjunto com a geologia de superfície e os resultados da prospecção mecânica, paraa definição do modelo geológico-geotécnico do maciço rochoso e para a localização da caverna dacentral.
Year: 2000
Number Pages:
6pp.
Author(s): Coelho, M. J.
Editor: SPG
Info
Improvement on open boundaries on a time dependent numerical model of wave propagation in the nearshore region
An improvement on the simulation of outgoing waves on a time dependent numerical model for water wave propagation in the nearshore region is presented. The governing equations consist of a system of first order partial differential equations (PDEs), the equation of continuity and the equation of motion. A comparative study of first order radiation boundary conditions (BCs) and first order radiation BCs combined with sponge layers is presented for cases where outgoing waves leave the numerical domain of calculation through the open boundary. A reduction of spurious reflections from the numerical open boundaries can be obtained with an irrelevant increase in terms of computational cost.
Year: 2000
Number Pages:
95-115.
Author(s): Oliveira, F. S. B. F.
Editor: Ocean Engineering
Volume:
28.
Info
In-sewer biodegradation study at the Costa do Estoril Interceptor System
N/A
Year: 2000
Author(s): Almeida, M. C.; Butler, D.; Matos, J. S.
Editor: Urban Water
Info
Inventariando, Monitorizando e Gerindo de Forma Sustentável Recursos Hídricos Subterrâneos
N/A
Year: 2000
Author(s): Lobo Ferreira, J. P. C.
Editor: in Resumos das comunicações do 5º Congresso da Água
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