A combined hillslope hydrology/stability model for low-gradient clay slopes in the Italian Dolomites

Angeli, Maceo-Giovanni; Buma, Jelle; Gasparetto, Paolo; Pasuto, Alessandro

doi:10.1016/s0013-7952(97)00033-1

Cited by 37 publications

(22 citation statements)

References 3 publications

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“…The lower unit (C2) and in-situ marls are relatively impervious and thus not considered in the hydrological model. A similar concept has been proposed in the Alverà landslide (Angeli et al, 1998;Bonomi and Cavallin, 1999). Table 1.…”

Section: The Hydrological Conceptmentioning

confidence: 77%

Forecasting the behaviour of complex landslides with a spatially distributed hydrological model

Malet

Asch

Beek

et al. 2005

Nat. Hazards Earth Syst. Sci.

120

125

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Abstract. The relationships between rainfall, hydrology and landslide movement are often difficult to establish. In this context, ground-water flow analyses and dynamic modelling can help to clarify these complex relations, simulate the landslide hydrological behaviour in real or hypothetical situations, and help to forecast future scenarios based on environmental change. The primary objective of this study is to investigate the possibility of including more temporal and spatial information in landslide hydrology forecasting, by using a physically based spatially distributed model. Results of the hydrological and geomorphological investigation of the Super-Sauze earthflow, one of the persistently active landslide occurring in clay-rich material of the French Alps, are presented. Field surveys, continuous monitoring and interpretation of the data have shown that, in such material, the groundwater level fluctuates on a seasonal time scale, with a strong influence of the unsaturated zone. Therefore a coupled unsaturated/saturated model, incorporating Darcian saturated flow, fissure flow and meltwater flow is needed to adequately represent the landslide hydrology. The conceptual model is implemented in a 2.5-D spatially distributed hydrological model. The model is calibrated and validated on a multi-parameters database acquired on the site since 1997. The complex time-dependent and three-dimensional groundwater regime is well described, in both the short-and longterm. The hydrological model is used to forecast the future hydrological behaviour of the earthflow in response to potential environmental changes.

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Section: The Hydrological Conceptmentioning

confidence: 77%

Forecasting the behaviour of complex landslides with a spatially distributed hydrological model

Malet

Asch

Beek

et al. 2005

Nat. Hazards Earth Syst. Sci.

120

125

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show abstract

“…The monitoring equipment connected to an automatic recording system consists of inclinometric tubes and extensometers for measurement of landslide displacement, and piezometers for the observation of groundwater fluctuations. Sliding surfaces have been found at 5 m and 20 m depth (Angeli et al 1998).…”

Section: Location Of Study Sitementioning

confidence: 94%

“…In order to simulate the behaviour of the Alvera mudslide a conceptual hydrological model and a slope stability model were developed and calibrated (Angeli et al 1996(Angeli et al , 1998. Together they are called the impact model in the following.…”

Section: Impact Model and Downscaling Techniquementioning

confidence: 99%

Application of an analog downscaling technique to the assessment of future landslide activity-a case study in the Italian Alps

Dehn¹

1999

Clim. Res.

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Slope stability and hence landslide activity is in many cases related to climate, which influences groundwater and pore pressure fluctuations of hillslopes. An approach is presented which transforms transient GCM output by statistical downscaling to local precipitation scenarios, which together with directly derived temperature scenarios are subsequently fed into a slope hydrological/stability model to derive future landslide activity. This model chain is applied to a landslide in the Dolomites, Italy. Validation of the approach against independent observed records suggests its applicability for estimating future landslide activity based on GCM results. One possible way of estimating the quality of the approach is to determine sources of uncertainty introduced by the GCM simulations and by different fitting periods of the downscaling technique. Differences between the GCM experiments are found to be more important than differences between the 2 fitting periods. The most striking result is the significant reduction of landslide activity in spring in all cases. This is attributable to the rise of winter temperature which impedes future storage of winter precipitation as snow. As one consequence, less melt water is available for the hillslope in spring, causing the decrease in activity. It can be concluded that differences between GCMs and differences between fitting periods permit quantification of part of the uncertainty inherent in climate change impact assessments. Impacts which emerge in all model combinations, such as the decrease in landslide activity in spring shown here, have a high level of confidence.

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“…This work includes the investigation of the relationships between ground movements and hydrological processes [1][2][3][4][5] (e.g. rainfall, ground water table variations), and the study of soil movements caused by the life processes of the vegetation.…”

Section: Introductionmentioning

confidence: 99%

A new borehole wire extensometer with high accuracy and stability for observation of local geodynamic processes

Mentes

2012

Review of Scientific Instruments

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Very stable and reliable instruments with high accuracy are required in field measurements for continuous monitoring local geodynamic processes, such as tectonic movements, ground motions in landslide prone areas, etc. A sensitive borehole wire extensometer with low energy consumption was developed in the Geodetic and Geophysical Research Institute of the Hungarian Academy of Sciences to observe very small vertical movements (in the order of a few millimeters) of the upper layer of the soil due to hydrological, meteorological and biological processes. The newly developed instrument eliminates the disadvantages of the borehole wire extensometers which are presently used. Its sensitivity and stability are much higher than these parameters of the previous instruments. The instrument is able to measure distance variations without instrumental drift in a range of 0-4 mm with a resolution of better than 1 µm. Since the effect of the yearly temperature variations can be easily removed from 2 the extensometric data record, the compensation for the short-periodic (daily) thermal effects on the instrument was of high priority during the design of the instrument. This paper describes the construction and calibration of the extensometer. The extensometer was installed for monitoring vertical ground movements due to hydro-meteorological processes on the high loess wall of the Danube River at Dunaföldvár, Hungary. The efficiency of the temperature compensation of the instrument was investigated in detail on the basis of the measured data series.

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A combined hillslope hydrology/stability model for low-gradient clay slopes in the Italian Dolomites

Cited by 37 publications

References 3 publications

Forecasting the behaviour of complex landslides with a spatially distributed hydrological model

Forecasting the behaviour of complex landslides with a spatially distributed hydrological model

Application of an analog downscaling technique to the assessment of future landslide activity-a case study in the Italian Alps

A new borehole wire extensometer with high accuracy and stability for observation of local geodynamic processes

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