The use of the shear wave velocity data as a field index for evaluating the liquefaction potential of sands is receiving increased attention because both shear wave velocity and liquefaction resistance are similarly influenced by many of the same factors such as void ratio, state of stress, stress history and geologic age. In this paper, the potential of support vector machines (SVM) based clas...

The microzonation of O(2) respiration, H(2)S oxidation, and SO(4) reduction in aerobic trickling-filter biofilms was studied by measuring concentration profiles at high spatial resolution (25 to 100 mum) with microsensors for O(2), S, and pH. Specific reaction rates were calculated from measured concentration profiles by using a simple one-dimensional diffusion reaction model. The importance of...

it is very important to study and simulate s-wave structure for near surface (alluvium parts, in particular) owing to its direct relationship to urban facilities in geotechnical and earthquake engineering studies. so, in seismic microzonation, the first step is to study and identify s-wave pattern in alluvium in order to categorize different parts of cites according to s-wave velocity. current ...

In the context of seismic risk, studying characteristics urban soils and built environment means adopting a holistic vision city, taking step forward compared to current microzonation approach. Based on this principle, CLARA WebGIS aims collect, organize, disseminate available information buildings in area Matera. The geodatabase is populated with (i) 488 downloadable geological, geotechnical, ...

An empirical, energy-based methodology for liquefaction hazard assessment and microzonation mapping is presented. The approach is probabilistic, considers the uncertainty in the liquefaction criterion, and is applicable to most earthquake-induced liquefaction analyses. The examples illustrated are for water-saturated sands at level ground. The energy of ground shaking is estimated from the Four...

In this work we assessed the shallow geothermal heat-exchange potential of a fluvial plain Central Apennines, lower Metauro Valley, where about 90,000 people live. Publicly available geognostic drilling data from Italian Seismic Microzonation studies have been exploited together with hydrogeological and thermophysical properties main geological formations area. These averaged over firsts 100 m ...