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您的检索式：作者名="FRODELLA William"
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| 1 | Debris flow hazard assessment by means of numerical simulations:implications for the Rotolon creek valley(Northern Italy)显示文摘On 4^(th) November 2010, a debris flow detached from a large debris cover accumulated above the lowermost portion of the Rotolon landslide(Vicentine Pre-Alps, NE Italy) and channelized in the valley below within the Rotolon Creek riverbed. Such event evolved into a highly mobile and sudden debris flow, damaging some hydraulic works and putting at high risk four villages located along the creek banks. A monitoring campaign was carried out by means of a ground based radar interferometer(GB-In SAR) to evaluate any residual displacement risk in the affected area and in the undisturbed neighbouring materials.Moreover, starting from the current slope condition, a landslide runout numerical modelling was performed by means of DAN-3D code to assess the impacted areas, flow velocity, and deposit distribution of the simulated events. The rheological parameters necessary for an accurate modelling were obtained through the back analysis of the 2010 debris flow event. Back analysis was calibrated with all of the available terrain data coming from field surveys and ancillary documents, such as topographic,geomorphological and geological maps, with pre-and post-event Li DAR derived DTMs, and with orthophotos. Finally, to identify new possible future debris flow source areas as input data for the new modelling, all the obtained terrain data were reanalysed and integrated with the GB-In SAR displacement maps; consequently, new simulations were made to forecast future events. The results show that the integration of the selected modelling technique with ancillary data and radar displacement maps can be a very useful tool for managing problems related to debris flow events in the examined area. | SALVATICI Teresa MORELLI Stefano PAZZI Veronica FRODELLA William FANTI Riccardo | 2017 | Journal of Mountain Science2017，14，4： | 5 |
| 2 | Event Scenario Analysis for the Design of Rockslide Countermeasures显示文摘The Torgiovannetto quarry(Assisi municipality,central Italy) is an example of a site where the natural equilibrium was altered by human activity,causing current slope instability phenomena which threaten two roadways important for the local transportation.The quarry front,having a height of about 140 m,is affected by a 182,000 m3 rockslide developed in intensely fractured limestone and is too large to be stabilized.In 2003 some tension cracks were detected in the vegetated area above the quarry upper sector.From then on,several monitoring campaigns were carried out by means of different instrumentations(topographic total station,extensometers,inclinometers,ground-based interferometric radar,laser scanner and infrared thermal camera),allowing researchers to accurately define the landslide area and volume.The latter's major displacements are localized in the eastern sector.The deformational field appears to be related to the seasonal rainfall.The landslide hazard associated with the worst case scenario was evaluated in terms of magnitude,intensity and triggering mechanism.For the definition of the possible runout process the DAN 3D code was employed.The simulation results were used in order to design and construct a retaining embankment.Furthermore,in order to preserve both the safety of the personnelinvolved in its realization and of the roadways users,an early warning system was implemented.The early warning system is based on daily-averaged displacement velocity thresholds.The alarm level is reached if the prediction based on the methods of Saito(1969) and Fukuzono(1985) forecasts an imminent rupture. | GIGLI Giovanni INTRIERI Emanuele LOMBARDI Luca NOCENTINI Massimiliano FRODELLA William BALDUCCI Marco VENANTI Luca Domenico CASAGLI Nicola | 2014 | Journal of Mountain Science2014，11，6： | 0 |
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