The debris flows of Austria

Aulitzky, Herbert

doi:10.1007/bf02590338

Cited by 11 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tropeano and Turconi (1999) presented data of debris-flow magnitude from a sample of 38 basins in the Western and Central Italian Alps: a comparison of unit values of debris-flow magnitude, performed using the t-test with separate variance estimate, shows the absence of significant differences with respect to the basins of the Eastern Italian Alps for a p-level of 0·05. Published data regarding other Alpine countries are not homogeneous with those collected in northeastern Italy, because available data concern only some selected events, such as those of summer 1987 in Switzerland (Rickenmann and Zimmermann, 1993), or apparently focus on high intensity events (Aulitzky, 1989): in such cases only a qualitative comparison is possible. The magnitude of debris flows in the Eastern Italian Alps seems to be similar to that of Swiss debris flows, whereas Austrian data show a higher number of very large debris flows (volume greater than 100 000 m 3 ).…”

Section: Data Presentationmentioning

confidence: 99%

Estimation of debris‐flow magnitude in the Eastern Italian Alps

Marchi

D’Agostino

2004

Earth Surf Processes Landf

129

View full text Add to dashboard Cite

The estimation of debris-flow magnitude is an essential step in the assessment of debris-flow hazard. Although different methods have been developed for the assessment of debris-flow magnitude, this is still a difficult task because of the complexity of flow processes and the lack of data to test estimation procedures in many mountainous regions. Data on debrisflow magnitude from 127 basins in the Eastern Italian Alps have been collected from scientific and technical journals, technical reports, historical documents gathered from local archives, and field surveys. These data were used to develop and test different predictive approaches, encompassing regression equations, geomorphological surveys and probabilistic analysis of time series. Regression techniques were used to correlate debris-flow magnitude to morphometric parameters and geological characteristics of the basins. Values of the channel debris yield rate (contribution per unit length of channel), proposed in the literature, were compared with data from the study area for identifying reference values for channel stretches of different morphological characteristics. Although limited to the few basins in which sufficient data were available, the probabilistic analysis of time series of debris-flow magnitude provides indications about the relations between magnitude and frequency of debris flows. Some observations about the capability and drawbacks of considered methods are presented and the combined use of different approaches for the estimation of debris-flow magnitude is suggested.

show abstract

Section: Data Presentationmentioning

confidence: 99%

Estimation of debris‐flow magnitude in the Eastern Italian Alps

Marchi

D’Agostino

2004

Earth Surf Processes Landf

129

View full text Add to dashboard Cite

show abstract

“…Precipitation intensity reaches world peaks of 600 -670 mm during two and half an hour. Along northern and eastern ridge maximum values of daily precipitation are 200 -250 mm [6].…”

Section: Overview Of Study Areamentioning

confidence: 99%

Comparison of Debris Flow Characteristics Obtained by Using Video Materials and Modeling

Kurovskaia¹,

Sokolova²,

Ostashov³

et al. 2019

OJG

View full text Add to dashboard Cite

Velocity of debris flow is one of the most important characteristics for the protective construction design. Since debris flows are rare events, and observations are conducted only on stations in Russia, Ukraine, Italy, Switzerland, USA, China, Japan and New Zealand, the velocity is calculated rather than measured. Nowadays, a large number of videos with passing debris flows have appeared on the Internet. Scientists can use such video materials to obtain qualitative and quantitative characteristics of the debris flow. Therefore, the aim of our research is an attempt to measure the debris flow velocity using video materials and compare the obtained results with the calculated values using various methods. The debris flow that came down in Firgen, Austria on August 4, 2012 was chosen as the object of our study. The video was carried out from several angles, so it was possible to select a section of the channel, through which we could measure the debris flows waves velocity. In addition, we calculated the velocities of waves by formulas adopted in the regulatory documents and compared with the measured by video values. During the video analysis, debris flow velocities at different sites were observed: minimum-7.2 m/s and maximum-10 m/s. The calculated values varied from 4.5 m/s to 11.4 m/s. Moreover, we applied model of the transport-shear process of debris flow formation developed by Yu. B. Vinogradov. When we were comparing the obtained debris flow discharges with results from Austrian colleagues, we found out that the values were similar to each other. However, internal scatter in the model changed from 151 to 190 m 3 /s, while in the report of Austrian colleagues the discharges were from 80 to 250 m 3 /s.

show abstract

“…Typically, only a few hundred cubic metres are involved in the initial mobilization, but debris flows commonly scour the flowpath to rock and grow to volumes of order 10 3 -10 5 m 3 ( van Dine, 1985;Aulitzky, 1989). The largest known debris flows exceed 10 6 m 3 volume.…”

Section: Hollows and Headmost Channelsmentioning

confidence: 99%

Mountains and Montane Channels

Church

2010

Sediment Cascades

View full text Add to dashboard Cite

The debris flows of Austria

Cited by 11 publications

References 2 publications

Estimation of debris‐flow magnitude in the Eastern Italian Alps

Estimation of debris‐flow magnitude in the Eastern Italian Alps

Comparison of Debris Flow Characteristics Obtained by Using Video Materials and Modeling

Mountains and Montane Channels

Contact Info

Product

Resources

About