Debris flow monitoring in the acquabona watershed on the Dolomites (Italian alps)

Berti, Matteo; Genevois, R.; LaHusen, Richard G.; Simoni, Alessandro; Tecca, Pia Rosella

doi:10.1016/s1464-1909(00)00090-3

Cited by 108 publications

(100 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some analyses of geophone signals induced by debris flows have been published during the last decades (Arattano and Moia, 1999;Berti et al, 2000;Hürlimann et al, 2003;Huang et al, 2007;Chou et al, 2010;Arattano et al, 2012). All these studies have substantially increased our knowledge on the dynamic behaviour of debris flows and the ground vibration they induce.…”

Section: Abancó Et Al: Analysis Of the Ground Vibration Generatedmentioning

confidence: 99%

“…Apart from debris flows, monitoring is also used for the analysis of other types of rapid mass movements like snow avalanches or rockfalls (Suriñach et al, 2005;Bessason et al, 2007;Vilajosana et al, 2008) and bedload transport in rivers and torrents (Rickenmann et al, 1998(Rickenmann et al, , 2012. Torrential processes, especially debris flows, generate seismic waves in the ground, originated by the collision between boulders or between boulders and the bedrock.…”

Section: Introductionmentioning

confidence: 99%

“…These features make them also very suitable not only for monitoring, but also for warning purposes. All over the world, several sites have been instrumented with geophones: Illgraben in Switzerland (Hürlimann et al, 2003), Lattenbach in Austria (Kogelnig et al, 2011a), Moscardo , Acquabona (Berti et al, 2000) or Gadria in Italy, Manival or Réal in France (Navratil et al, 2011), Mount St. Helens in USA (LaHusen, 2005b), Houyenshan (Chou et al, 2010), Fong-Ciou Creek or Ai-Yu-Zi Creek Fang et al, 2011) in Taiwan, and Jiangjia in China (Cui et al, 2005) are some examples.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of the ground vibration generated by debris flows and other torrential processes at the Rebaixader monitoring site (Central Pyrenees, Spain)

Abancó

Hürlimann

Moya

2014

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Monitoring of debris flows using ground vibration sensors has increased in the last two decades. However, the correct interpretation of the signals still presents ambiguity. In the Rebaixader monitoring site (Central Pyrenees, Spain) two different ground vibration stations are installed. At the first station the ground velocity signal is transformed into an impulses-per-second signal (low frequency, 1 Hz). The analysis of the data recorded at this station show that the shape of the impulses signal is one of the key parameters to describe the evolution of the event. At the second station the ground velocity signal is directly recorded at high frequency (250 Hz). The results achieved at this station show that the differences in time series and spectral analysis are helpful to describe the temporal evolution of the events. In addition, some general outcomes were obtained: the attenuation of the signal with the distance has been identified as linear to exponential; and the assembly of the geophones to the terrain has an important effect on the amplification of the signal. All these results highlight that the definition of ground vibration thresholds for debris-flow detection or warning purposes is a difficult task; and that influence of site-specific conditions is notable.

show abstract

Section: Abancó Et Al: Analysis Of the Ground Vibration Generatedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the ground vibration generated by debris flows and other torrential processes at the Rebaixader monitoring site (Central Pyrenees, Spain)

Abancó

Hürlimann

Moya

2014

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Iverson found high-frequency fluctuations in the normal stress measurement, assumed to be related to granular impacts. In natural channels, normal stresses on the bed have been reported by Berti et al [2000] (12 -17 kPa, excursions 2 kPa) and McArdell et al [2007] (5 -20 kPa, excursions 2 kPa). The size of the sensor plate and frequency of measurement affects the ability to resolve local grain bed contact stresses [Iverson, 1997].…”

Section: Measurements and Modelingmentioning

confidence: 99%

Correction to “Experimental study of bedrock erosion by granular flows”

Hsu¹,

Dietrich²,

Sklar³

2008

J. Geophys. Res.

View full text Add to dashboard Cite

[1] Field studies suggest that bedrock incision by granular flows may be the primary process cutting valleys in steep, unglaciated landscapes. An expression has been proposed for debris flow incision into bedrock which posits that erosion rate depends on stresses due to granular interactions at the snout of debris flows. Here, we explore this idea by conducting laboratory experiments to test the hypothesis that bedrock erosion is related to grain collisional stresses which scale with shear rate and particle size. We placed granular material in a 56-cm-diameter rotating drum to explore the relationship between erosion of a synthetic bedrock sample and variables such as grain size, shear rate, water content, and bed strength. Grain collisional stresses are estimated as the inertial stress using the product of the squares of particle size and vertical shear rate. Our uniform granular material consisted of 1-mm sand and quartzite river gravel with means of 4, 6, or 10 mm. In 67 experimental runs, the eroded depth of the bed sample varied with inertial stresses in the granular flow to a power less than 1.0 and inversely with the bed strength. The flows tended to slip on smooth boundaries, resulting in higher erosion rates than no-slip cases. We found that lateral wall resistance generated shear across the channel, producing two cells whose widths depended on wall roughness. While the hypothesized inertial stress dependency is supported with these data, wear mechanics needs to account for grain dynamics specifically at the snout and possibly to include lateral shear effects.

show abstract

“…Typical monitoring stations consist of geophones, ultrasonic sensors (or radar), and video cameras which satisfy the basic measurements of velocity, height, discharge, and visual validation. Some catchments also present multiple stations distributed throughout the debris-flow channel and some located in headwater channels (Berti et al, 2000;Marchi et al, 2002;Hürlimann et al, 2003;McCoy et al, 2010;Arattano et al, 2012;Navratil et al, 2013;Comiti et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Exploiting LSPIV to assess debris-flow velocities in the field

Theule

Crema

Marchi

et al. 2018

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The assessment of flow velocity has a central role in quantitative analysis of debris flows, both for the characterization of the phenomenology of these processes and for the assessment of related hazards. Large-scale particle image velocimetry (LSPIV) can contribute to the assessment of surface velocity of debris flows, provided that the specific features of these processes (e.g. fast stage variations and particles up to boulder size on the flow surface) are taken into account. Three debris-flow events, each of them consisting of several surges featuring different sediment concentrations, flow stages, and velocities, have been analysed at the inlet of a sediment trap in a stream in the eastern Italian Alps (Gadria Creek). Free software has been employed for preliminary treatment (orthorectification and format conversion) of video-recorded images as well as for LSPIV application. Results show that LSPIV velocities are consistent with manual measurements of the orthorectified imagery and with front velocity measured from the hydrographs in a channel recorded approximately 70 m upstream of the sediment trap. Horizontal turbulence, computed as the standard deviation of the flow directions at a given cross section for a given surge, proved to be correlated with surface velocity and with visually estimated sediment concentration. The study demonstrates the effectiveness of LSPIV in the assessment of surface velocity of debris flows and permit the most crucial aspects to be identified in order to improve the accuracy of debris-flow velocity measurements.

show abstract

Debris flow monitoring in the acquabona watershed on the Dolomites (Italian alps)

Cited by 108 publications

References 2 publications

Analysis of the ground vibration generated by debris flows and other torrential processes at the Rebaixader monitoring site (Central Pyrenees, Spain)

Analysis of the ground vibration generated by debris flows and other torrential processes at the Rebaixader monitoring site (Central Pyrenees, Spain)

Correction to “Experimental study of bedrock erosion by granular flows”

Exploiting LSPIV to assess debris-flow velocities in the field

Contact Info

Product

Resources

About