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  • 1
    Electronic Resource
    Electronic Resource
    Effluent Diffusion and Sediment Dispersion at Microtidal River Mouths, Predicted Using Mathematical Models
    Amsterdam : Elsevier
    Estuarine, Coastal and Shelf Science 38 (1994), S. 189-206 
    Details
    ISSN: 0272-7714
    Keywords: Greece ; deltas ; mathematical model ; river plumes ; sediment dispersion
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Geography , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1006/ecss.1994.1012
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution, Digital Mapping of the Seismic Hazard within the Gulf of Evia Rift, Central Greece Using Normal Fault Segments as Line Sources (2000)
    Springer
    Natural hazards 22 (2000), S. 203-223 
    Details
    ISSN: 1573-0840
    Keywords: seismic hazard ; central Greece ; Gulf of Evia ; fault segmentation ; FRISK ; GIS ; digital mapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Seismic hazard within juvenile rift systems ismodelled by a semi-statistical procedure based onfault segmentation theory. Fault segmentationprovides the physical basis for strong earthquakerecurrence in regions undergoing extension, andtherefore, it may control the position and size of rupture areas for future events. The computercode FRISK (McGuire, 1978) is applied to calculateprobabilistic estimates of ground motion parameters. Six normal fault segments, on average 25 km long, aremodelled as the earthquake sources within the Gulf ofEvia Rift, Central Greece. The position and length ofsegments have been determined from image processing ofremotely-sensed data and field work. FRISK output isdirected to a Geographical Information System (GIS)and a series of high-resolution (0.1 by 0.1 of adegree) digital maps are produced. The results for100 year acceleration (63% not to be exceeded) showa 50% increase in the seismic hazard from previouslyestimated magnitudes. Areas of maximum hazard (over0.4 g) are located on the south coast of the Gulf ofEvia between the towns of Kammena Vourla and Arkitsa. The obtained shape of Peak Ground Acceleration (PGA)contours is slightly elliptical with the long axis ofthe ellipse trending E-W, and symmetric, with respectto the rift axis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008159904873
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  • 3
    Electronic Resource
    Electronic Resource
    Tsunamis in and near Greece and their relation to the earthquake focal mechanisms (1991)
    Springer
    Natural hazards 4 (1991), S. 161-170 
    Details
    ISSN: 1573-0840
    Keywords: Tsunami ; tsunami earthquake ; earthquake mechanism ; tsunamigenic zone ; Greece ; eastern Mediterranean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The major earthquake-induced tsunamis reliable known to have occurred in and near Greece since antiquity are considered in the light of the recently obtained reliable data on the mechanisms and focal depths of the earthquakes occurring here. (The earthquake data concern the major shocks of the period 1962–1986.) First, concise information is given on the most devastating tsunamis. Then the relation between the (estimated) maximum tsunami intensity and the earthquake parameters (mechanism and focal depth) is examined. It is revealed that the most devastating tsunamis took place in areas (such as the western part of the Corinthiakos Gulf, the Maliakos Gulf, and the southern Aegean Sea) where earthquakes are due to shallow normal faulting. Other major tsunamis were nucleated along the convex side of the Hellenic arc, characterized by shallow thrust earthquakes. It is probably somewhere there (most likely south of Crete) that the region's largest known tsunami occurred in AD 365, claiming many lives and causing extensive devastation in the entire eastern Mediterranean. Such big tsunamis seem to have a return period of well over 1000 years and can be generated by large shallow earthquakes associated with thrust faulting beneath the Hellenic trench, where the African plate subduces under the Euroasian plate. Lesser tsunamis are known in the northernmost part of the Aegean Sea and in the Sea of Marmara, where strike-slip faulting is observed. Finally, an attempt is made to combine the tsunami and earthquake data into a map of the region's main tsunamigenic zones (areas of the sea bed believed responsible for past tsunamis and expected to nucleate tsunamis in the future).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00162785
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  • 4
    Electronic Resource
    Electronic Resource
    Re-evaluation of minor events: The examples of the 1895 and 1909 Rome earthquakes (1993)
    Springer
    Natural hazards 7 (1993), S. 219-235 
    Details
    ISSN: 1573-0840
    Keywords: Rome ; local earthquakes ; vulnerability ; intensity estimation ; historical earthquakes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The city of Rome is subjected to moderate seismic risk due to both local and external seismicity. Up to now, the maximum intensity felt has never exceeded VIII MCS. The 1 November 1895 (I o = VII) and 31 August 1909 (I o = VI) earthquakes demonstrate that small local events can also cause damage in a large old city. In the present work, we have re-evaluated the intensity values of those two events by means of automatic processing. A comparison between the present results with geological evidence and previous studies is shown, especially for the historical centre of Rome. For the first time, the 1909 earthquake instrumental magnitudeM L = 3.6 has been calculated from original recordings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00662648
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  • 5
    Electronic Resource
    Electronic Resource
    Contribution of Geographical Information Systems to the Management of Volcanic Crises (2000)
    Springer
    Natural hazards 21 (2000), S. 347-360 
    Details
    ISSN: 1573-0840
    Keywords: volcanic hazard ; risk assessment ; GIS ; physical simulation models ; information systems ; emergency planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The incorporation of a set ofcomputer-based tools, such as Geographical InformationSystems and physical models, to the field of riskassessment, introduces a new perspective in thevolcanic risk maps production, increasing the analysisand modelling capabilities available through theapplication of conventional methodologies. Amethodology adapted to the requirements andcharacteristics of the new operating environment hasbeen applied at Tenerife island (Canary Islands,Spain) to carry out a study devoted to analyse thesuitability of these tools for near real-timemanagement of volcanic crises. With this in mind, aseries of potential eruption scenarios have beenselected to identify and characterise which elementsat risk would prove most vulnerable against a specificvolcanic phenomenon, depending on the socio-economiccharacteristics of the area affected and the resultingdistribution of the volcanic products. This kind ofinformation is fundamental to update, adapt or produceeffective risk management and emergency plans orprotocols, where the measures to mitigate or fightagainst a specific volcanic disaster have to be taken,incorporating the existing knowledge of the phenomenonbehaviour and taking into account their potentialeffects on the area of interest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008150816028
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  • 6
    Electronic Resource
    Electronic Resource
    On the reliability of different methods of seismic hazard assessment in Greece (1990)
    Springer
    Natural hazards 3 (1990), S. 141-151 
    Details
    ISSN: 1573-0840
    Keywords: Seismic hazard ; macroseismic intensity ; seismic zonation ; ‘mean value’ method ; Cornell's method ; Greece
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Historical and present century instrumental data have been used to determine seismic hazard in 35 sites of Greece by the application of Cornell's method (Cornell, 1968) and the ‘mean value’ method. The macroseismic intensity has been considered as a measure of seismic hazard. Comparison of the results of the two methods showed that, in general, the ‘mean value’ method gives higher values, particularly for low probabilities of exceedance. In addition, for some sites, the differences of the expected intensities resulting from the two methods, indicate that finer tuning of the seismogenic souce model is required, or suggest time dependence. Although each one of these methods has its own merits, the method based on seismic zonation (Cornell's method) has several advantages and must be preferred when an accurate zonation is possible by the use of macroseismic and instrumental seismic data, together with geological and geomorphological information. However, reliable estimates of seismic hazard at a particular site require work on a microzoning scale, incorporating historical, archaeological, and recent geological data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00140428
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  • 7
    Electronic Resource
    Electronic Resource
    Comparing Landslide Hazard Maps (1999)
    Springer
    Natural hazards 20 (1999), S. 137-158 
    Details
    ISSN: 1573-0840
    Keywords: landslides hazard ; direct methods ; indirect methods ; GIS ; geomorphology ; Alpago area
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The objective of the method explained in this paper isto obtain a better insight in the decision rulesapplied by geomorphologists in the direct mapping oflandslide hazard. This can be obtained by forcinggeomorphologists to specify for each unit (polygon) intheir hazard map the criteria that they used toclassify the unit as high, medium or low hazard. Whenthis is done systemically for an entire area, it ispossible to analyze those criteria statistically, andto evaluate whether they can be grouped into generaldecision rules, or whether these criteria arecompletely site specific. The same area in the Alpagoregion in Italy was mapped at 1 : 5000 scale by threeteams of experts individually. The different methodsare presented and the results are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008036810401
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  • 8
    Electronic Resource
    Electronic Resource
    GIS Techniques for Mapping Groundwater Contamination Risk (1999)
    Springer
    Natural hazards 20 (1999), S. 279-294 
    Details
    ISSN: 1573-0840
    Keywords: risk assessment ; groundwater contamination ; vulnerability ; GIS ; hazard ; economic ; value
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The groundwater contamination risk map of a samplealluvial area was produced by using the IlwisGeographical Information System (GIS) to construct andto overlay thematic maps. The risk map has beenderived from the vulnerability map, the hazard map,where the potential contaminating sources wereidentified, and the socio-economic value of thegroundwater resource, represented by the wells. Thegroundwater quality map allowed thereliability of hazard and risk maps to be tested. The final map shows interesting results and stressesthe need for the GIS to test and improve on thegroundwater contamination risk assessment methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008192919933
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  • 9
    Electronic Resource
    Electronic Resource
    Intensity Distribution and Neotectonic Macrostructure Pyrgos Earthquake Data (26 March 1993, Greece) (2000)
    Springer
    Natural hazards 21 (2000), S. 19-33 
    Details
    ISSN: 1573-0840
    Keywords: Pyrgos earthquake ; Greece ; intensity distribution ; neotectonic macrostructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract We present a number of data for the Pyrgos (W.Peloponnessos, Greece), which took place on 26 March1993 and caused considerable damage in the town ofPyrgos and the surrounding area. The local geologicaland neotectonic conditions are also outlined; they aremainly characterized by complex stratigraphicstructure and outcrop pattern, together with a largenumber of large active fault zones and/or isolatedfaults. The detailed damage recording in themeizoseismal area, which was based on the EMS-92,showed significant differentiation of damage from oneurban unit to another, regardless of the foundationformation. The correlation of the existing dataconfirmed the decisive impact of faults and fault zoneon intensity distributions. It was also clear that,the larger a fault zone, the greater was thedifference in intensity across that structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008153620842
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  • 10
    Electronic Resource
    Electronic Resource
    A Modern Technique for the Retrieval andProcessing of Historical Seismograms in Greece (2000)
    Springer
    Natural hazards 21 (2000), S. 55-64 
    Details
    ISSN: 1573-0840
    Keywords: historical seismograms ; digitization ; Greece
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract A brief history of operation of the mechanicalseismographs in Greece and the application of atechnique for converting analog seismograms to digitaltraces in a form suitable for further processing orarchiving are presented in this study. A short historyabout the installation of mechanical seismographs inGreece, the characteristics of these instruments, areference on the usage of historical records, as wellas a presentation of the procedure followed from theidentification of the record to the archiving it as adigital file have been included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008101329718
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