Recent lahars at Volcán de Colima (Mexico): Drainage variation and spectral classification

Dávila, Norma; Capra, Lucía; Gavilanes-Ruiz, J.C.; Varley, Nick; Norini, Gianluca; Vázquez, Ángel Gómez

doi:10.1016/j.jvolgeores.2007.05.016

Cited by 82 publications

(50 citation statements)

References 13 publications

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“…Their terrain data were derived from topographic maps and an airborne SAR (TOPSAR by NASA) with 20 m and 10 m horizontal resolution respectively. In contrast to this, the hazard zonation of Davila et al (2007) at Colima volcano in Mexico reveals higher lateral spreading and a 1.5 km shorter runout distance for the coarser DTM. Therefore we deduce that the behaviour of the LAHARZ model is highly dependent not only on the spatial resolution, but also on the acquisition method of the DTM.…”

Section: Results Of the Laharz Modelcontrasting

confidence: 56%

“…These volumes are plausible for the possible scenarios without any additional water from rainfall (as described in 1.3.) and lie within the range of modelled lahar volumes at Concepción Volcano in Nicaragua (Vallance et al, 2001) and at Colima in Mexico (Davila et al, 2007). Larger or more diluted lahars, which also may reach farther, are assumed to develop only as a combination of glaciervolcano interaction processes and rainfall events with shallow landsliding and additional sediment entrainment.…”

Section: Results Of the Laharz Modelmentioning

confidence: 93%

“…Assuming similar conditions at Iztaccíhuatl, we used the same H'/L' value for the LA-HARZ model runs on Iztaccíhuatl. For comparison, Iverson et al (1998) used an H'/L' of 0.23 at Mount Rainier in the US, and Davila et al (2007) used a much lower value of 0.04 for Colima volcano in Mexico. The latter value is probably more appropriate for hyperconcentrated flows than for debris-flow-like lahars.…”

Section: Results Of the Laharz Modelmentioning

confidence: 99%

“…The lahars simulated in this study represent debris flow types with sediment concentrations similar to the observed ice-melt-triggered lahars on Popocatépetl in City, the study area and Puebla is derived from SRTM3 elevation model. The dotted area shown as 'prehispanic lahars' represent the approximate extent of areas flooded by repeated lahar events from Popocatépetl, Iztaccíhuatl and La Malinche after Siebe et al (1996). al., 1998; Julio Miranda and Delgado Granados, 2003;Sheridan et al, 2005;Walder et al, 2005;Hubbard et al, 2006;Davila et al, 2007;Huggel et al, 2008). By applying such tools to Iztaccíhuatl volcano in Mexico, we show how an initial hazard evaluation can be carried out relatively fast and at low cost.…”

Section: Introductionmentioning

confidence: 99%

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Assessing lahars from ice-capped volcanoes using ASTER satellite data, the SRTM DTM and two different flow models: case study on Iztaccíhuatl (Central Mexico)

Schneider

Granados

Huggel

et al. 2008

Nat. Hazards Earth Syst. Sci.

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Abstract. Lahars frequently affect the slopes of ice-capped volcanoes. They can be triggered by volcano-ice interactions during eruptions but also by processes such as intense precipitation or by outbursts of glacial water bodies not directly related to eruptive activity. We use remote sensing, GIS and lahar models in combination with ground observations for an initial lahar hazard assessment on Iztaccíhuatl volcano (5230 m a.s.l.), considering also possible future developments of the glaciers on the volcano. Observations of the glacial extent are important for estimations of future hazard scenarios, especially in a rapidly changing tropical glacial environment. In this study, analysis of the glaciers on Iztaccíhuatl shows a dramatic retreat during the last 150 years: the glaciated area in 2007 corresponds to only 4% of the one in 1850 AD and the glaciers are expected to survive no later than the year 2020. Most of the glacial retreat is considered to be related to climate change but in-situ observations suggest also that geo-and hydrothermal heat flow at the summit-crater area can not be ruled out, as emphasized by fumarolic activity documented in a former study. However, development of crater lakes and englacial water reservoirs are supposed to be a more realistic scenario for lahar generation than sudden ice melting by rigorous volcano-ice interaction. Model calculations show that possible outburst floods have to be larger than ∼5×10 5 m 3 or to achieve an H/L ratio (Height/runout Length) of 0.2 and lower in order to reach the populated lower flanks. This threshold volume equals 2.4% melted ice of Iztaccíhuatl's total ice volume in 2007, assuming 40% water and 60% volumetric debris content of a potential lahar. The model sensitivity analysis reveals important effects of the generic type of the Digital Terrain ModelCorrespondence to: D. Schneider (demian.schneider@geo.uzh.ch) (DTM) used on the results. As a consequence, the predicted affected areas can vary significantly. For such hazard zonation, we therefore suggest the use of different types of DTMs and flow models, followed by a careful comparison and interpretation of the results.

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Section: Results Of the Laharz Modelcontrasting

confidence: 56%

Section: Results Of the Laharz Modelmentioning

confidence: 93%

Section: Results Of the Laharz Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessing lahars from ice-capped volcanoes using ASTER satellite data, the SRTM DTM and two different flow models: case study on Iztaccíhuatl (Central Mexico)

Schneider

Granados

Huggel

et al. 2008

Nat. Hazards Earth Syst. Sci.

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show abstract

“…백두산의 폭발 가 능성은 지진빈도의 증가, 온천수의 수온상승, 화산 가스 발생량 변화, 천지 하부에 존재하는 마그마 쳄 버(magma chamber)의 상승, 화산체 상승 및 지형 변 화 사례 등을 근거로 지속적으로 보고되고 있다 (Liu et al, 2011;Kim, 2011). (Saucedo et al, 2005;Davila et al, 2007;Hubbard et al, 2007;Huggel et al, 2008;Schenider et al, 2006) (Iverson et al, 1998). (Iverson et al, 1998).…”

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Application of LAHARZ for Lahar Modeling in Mt. Baekdusan

Jung¹,

Kim²,

Kim

et al. 2013

Journal of the Korean earth science society

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Recent reports about Mt. Baekdusan indicate an increasing potential of lahar generation due to volcanic activity around Lake Cheonji. In this study, we model lahar assuming volcanic activity underneath the caldera located at the top of Mt. Baekdusan. Lahar-inundation hazard zones (LAHARZ), software that runs within a Geographic Information System (GIS), was used for lahar modeling in various conditions of digital terrain resolution and model parameters. The sensitivity analysis of model parameters shows that both sink threshold and terrain resolution have limited impact on the modeling result. Combinations of stream threshold and resolution indicate distinctive distributions in stream delineation. The limitations of LAHARZ seem to largely be associated with the assumption of an existing flow generation algorithm. However, the impact of different resolutions on the final lahar extent was found to be small.

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Microstructural controls on the physical and mechanical properties of edifice‐forming andesites at Volcán de Colima, Mexico

et al. 2014

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The reliable assessment of volcanic unrest must rest on an understanding of the rocks that form the edifice. It is their microstructure that dictates their physical properties and mechanical behavior and thus the response of the edifice to stress perturbations during unrest. We evaluate the interplay between microstructure and rock properties for a suite of edifice-forming rocks from Volcán de Colima (Mexico). Microstructural analyses expose (1) a pervasive, isotropic microcrack network, (2) a high, subspherical vesicle density, and (3) a wide vesicle size distribution. This complex microstructure severely impacts their physical and mechanical properties. In detail, porosities are high and range from 8 to 29%. As a consequence, elastic wave velocities, Youngs moduli, and uniaxial compressive strengths are low, and permeabilities are high. All of the rock properties demonstrate a wide range. For example, strength decreases by a factor of 8 and permeability increases by 4 orders of magnitude over the porosity range. Below a porosity of 11-14%, the permeability-porosity trend follows a power law with a much higher exponent. Microstructurally, this represents a critical vesicle content that efficiently connects the microcrack population and permits a much more direct path through the sample, rather than restricting flow to long and tortuous microcracks. Values of tortuosity inferred from the Kozeny-Carman permeability model support this hypothesis. However, we find that the complex microstructure precludes a complete description of their mechanical behavior through micromechanical modeling. We urge that the findings of this study be considered in volcanic hazard assessments at andesitic stratovolcanoes.

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Recent lahars at Volcán de Colima (Mexico): Drainage variation and spectral classification

Cited by 82 publications

References 13 publications

Assessing lahars from ice-capped volcanoes using ASTER satellite data, the SRTM DTM and two different flow models: case study on Iztaccíhuatl (Central Mexico)

Assessing lahars from ice-capped volcanoes using ASTER satellite data, the SRTM DTM and two different flow models: case study on Iztaccíhuatl (Central Mexico)

Application of LAHARZ for Lahar Modeling in Mt. Baekdusan

Microstructural controls on the physical and mechanical properties of edifice‐forming andesites at Volcán de Colima, Mexico

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