Matthieu Kervyn

Matthieu Kervyn
Vrije Universiteit Brussel | VUB · Department of Geography

PhD in Geology

About

196
Publications
89,802
Reads
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2,933
Citations
Additional affiliations
September 2010 - present
Vrije Universiteit Brussel
Position
  • Lecturer in Physcial Geography
May 2010 - July 2010
Université Clermont Auvergne
Position
  • PostDoc Position

Publications

Publications (196)
Article
Full-text available
Study region Mount Meru located in Northern Tanzania. Study focus Groundwater level monitoring is essential for uncovering the spatial-temporal variation of groundwater levels in a studied aquifer, helping discussions on the sustainable use and management of groundwater resources. This study analyses the spatial and temporal variability of groundw...
Article
Full-text available
Classical mechanisms of volcanic eruptions mostly involve pressure buildup and magma ascent towards the surface1. Such processes produce geophysical and geochemical signals that may be detected and interpreted as eruption precursors1–3. On 22 May 2021, Mount Nyiragongo (Democratic Republic of the Congo), an open-vent volcano with a persistent lava...
Poster
Full-text available
Understanding risk perception and factors controlling the willingness to implement DRR actions is essential for effective crisis management, especially in densely populated cities close to volcanoes, like Goma in the East of the DRC. Willingness to implement DRR actions is assumed to be influenced by risk perception, but also by the individual eval...
Poster
Full-text available
The willingness to implement risk protective measures (protection motivation) differs between individuals and informing people at risk about the risk they face may not be sufficient to generalize the implementation of protective measures. Therefore, an assessment of the individual psychological appraisal of the risk (threat appraisal) and of the ri...
Preprint
Full-text available
Risk perception is an essential element to consider for effective risk management at time of eruption. This is especially the case in densely populated cities close to volcanoes like Goma in the East of the Democratic Republic of Congo highly exposed to volcanic hazards from Nyiragongo. The perception of volcanic risk involves the processes of coll...
Article
Understanding of the aquifer structure and its hydraulic properties provides comprehensive knowledge for proper groundwater utilisation and management. This study delineated the aquifer structure using litho-hydrostratigraphical cross-sections, and estimated the hydraulic parameters using single well pumping tests for various locations on and aroun...
Article
Full-text available
Like many other lakes in the world, the interconnected Abaya and Chamo lakes in the Southern Main Ethiopian Rift are affected by rapid sediment accumulation. Although land degradation is a well-known issue in this part of the African continent, the main sediment sources, their spatial distribution and interaction in the Abaya–Chamo lakes’ basin hav...
Article
Full-text available
Like many other lakes in the world, the interconnected Abaya and Chamo lakes in the Southern Main Ethiopian Rift are affected by rapid sediment accumulation. Although land degradation is a well-known issue in this part of the African continent, the main sediment sources, their spatial distribution and interaction in the Abaya–Chamo lakes’ basin hav...
Article
Full-text available
The way people perceive the volcanic risk and how this leads them to take protective measures is an essential topic in volcanology. We apply the Protection Motivation Theory (PMT) to analyse the threat and coping appraisal of individuals living at different distance ranges from Volcán de Colima, Mexico. We assessed respondents’ perceived vulnerabil...
Conference Paper
Ol Doinyo Lengaï (OL) in north Tanzania is the only active volcano in the world emitting natrocarbonatite lavas. This stratovolcano (2962 m a.s.l) is mostly characterized by effusive lava emissions since 1983. However, on the 4th of September 2007, explosive events marked the beginning of a new eruptive style that lasted until April 2008. This new...
Conference Paper
Full-text available
A water quality problem exists in populated areas along the flanks of Mt. Meru in northern Tanzania, with excessively high fluoride (F-) concentrations exceeding the WHO drinking water standards (1.5 mg/L). Little is known about the potential sources of F-among the various rocks types forming the Meru aquifers. Nineteen samples (Debris avalanche de...
Preprint
Full-text available
About 350 maar craters, tuff rings, and tuff cones are spread along the Manyara rift escarpment, and clustered around the Hanang and Kwahara volcanoes in North Tanzania. They lie in the East African Rift, an active extensional setting, where the magma composition is moderately to highly alkaline and carbonate-rich. We present newly-collected deposi...
Conference Paper
Full-text available
The city of Goma is located in the eastern region of the Democratic Republic of Congo. With around one million inhabitants, it is built on lava flows, 15 km south of the active Nyiragongo volcano. Historically, the town was affected twice by eruptions, in 1977 and 2002 and severe destructions were reported. At that time, no volcanic risk preparedne...
Article
Full-text available
Spatio-temporal inventory of natural hazards is a challenging task especially in rural or remote areas in the Global South where data collection at regional scale is difficult. Citizen science, i.e., involvement of no-experts in collecting information and co-creation of knowledge with experts to solve societal and environmental problems, has been s...
Article
The added value of indigenous practices for Disaster Risk Reduction (DRR) is increasingly stressed by scholars. Yet this fails to translate into practical application as these scholars miss a clear understanding of the processes that shape indigenous DRR. Based on a case of floods in the Rwenzori (Uganda), in this study, the aimed is to conceptuali...
Presentation
The long-term (ka to ma) degradation of a volcanic edifice is controlled by both regional (e.g., climate, tectonics) and local factors (e.g., original morphology, lithology), resulting in both long-lasting weathering and river incision and short-term hazardous events, such as flank collapses and lahars. Trends among the morphometry of stratovolcano...
Article
Full-text available
The integration of indigenous knowledge into understanding disasters from natural hazards is hitherto hampered by the limited conceptualization of the process that shapes indigenous knowing. This study proposed a framework, structuring the processes that shape indigenous knowledge on disaster risk. Bearing that framework in mind, the evolution of d...
Article
Full-text available
Efforts in Disaster Risk Reduction (DRR) are widely geared towards integrating indigenous knowledge and science. Several conceptual frameworks have thus evolved towards co-creating knowledge and co-designing DRR measures from the standpoint of the communities-at-risk. This is claimed to foster optimization and sustainability of measures. This study...
Conference Paper
Volcano morphology is the result of complex interactions between constructive and destructive phases. The dynamics of eruptive, intrusive and erosive processes are reflected in the shapes of volcanoes today. Quantifying the morphology and degradation patterns of composite volcanoes can provide new insights into the evolution of these landforms and...
Article
The role indigenous knowledge plays to increase context-specificity as well as expose blind spots in scientific understanding is widely evidenced in the field of disaster risk studies. As a contribution to advancing this evidence, this study aims at structuring the processes that shape indigenous knowledge production and its optimization based on t...
Article
This study investigates the localities of low and high F⁻ groundwaters in the aquifer system on the flanks of Mount Meru to come up with guidelines to provide groundwater that can be used for drinking water supply without health impacts on the population. Our study focuses on parts of the flanks which were only partially or not at all covered by pr...
Article
Full-text available
The population of the semi-arid areas of the countries in the East African Rift Valley (EARV) is faced with serious problems associated with the availability and the quality of the drinking water. In these areas, the drinking water supply largely relies on groundwater characterised by elevated fluoride concentration (> 1.5 mg/L), resulting from int...
Presentation
Full-text available
Characterisation of the aquifer and determination of its hydraulic properties is crucial for providing comprehensive knowledge for proper groundwater utilisation and management. This study delineates the aquifer structure using litho-hydrostratigraphy cross-sections and estimates the hydraulic parameters using single well pumping tests. The study f...
Article
Full-text available
This study characterises high-fluoride groundwater in the aquifer system on the flanks of Mount Meru, focusing on parts of the flanks that were only partially or not at all covered by previous research. Additionally, we analyse the impact of rainwater recharge on groundwater chemistry by monitoring spring discharges during water sampling. The resul...
Article
This study characterises high-fluoride groundwater in the aquifer system on the flanks of Mount Meru, focusing on parts of the flanks that were only partially or not at all covered by previous research. Additionally, we analyse the impact of rainwater recharge on groundwater chemistry by monitoring spring discharges during water sampling. The resul...
Conference Paper
The (inter)national agenda continues to frame Disaster Risk Reduction (DRR) in hierarchies where top-down actors (scientists and policymakers) define interventions for communities-at-risk. To make this process context-specific and people-centered, especially for low-income economies, incorporating indigenous knowledge is increasingly emphasized. Th...
Article
Full-text available
People’s vulnerability, exposure and capacity are key components of a risk assessment. Index-based methodologies have proved useful to document spatial variation in risk-controlling factors. The objective of this study is to propose a methodology to derive quantitative indicators of household vulnerability, exposure and capacity to assess household...
Preprint
Full-text available
Risk management is used in societies to mitigate the potentially dramatic effects of natural hazards. Local authorities and managers use different indicators in elaborating rescue and urbanism plans, which are not always efficient in reducing impact in the time of the crisis. This highlights society’s vulnerability in the particular context of glob...
Article
Slow-moving landslides exhibit persistent but non-uniform motion at low rates which makes them exceptional natural laboratories to study the mechanisms that control the dynamics of unstable hillslopes. Here we leverage 4.5+ years of satellite-based radar and optical remote sensing data to quantify the kinematics of a slow-moving landslide in the tr...
Article
Mt. Meru, in the northern Tanzania divergence zone within the East African Rift System, is a historically active volcano, with its last eruption in 1910 CE. The flank deposits of Meru are dominated by lava flows, debris avalanche deposits as well as major pyroclastic formations indicative of Plinian-style eruptions. The stratigraphy, spatial extent...
Article
Granular materials are a useful analogue for the Earth's crust in laboratory models of deformation. Constraining their mechanical properties is critical for such model's scaling and interpretation. Much information exists about monomineralic granular materials, such as quartz sand, but the mechanical characteristics of bimineralic mixtures, such as...
Conference Paper
Full-text available
Lake Abaya and Lake Chamo are located within the rift valley that cuts across eastern Ethiopia. Severe soil erosion, predominantly gully erosion in the midlands and highlands, and flash flooding along rivers in the lowlands resulted in sediment and nutrient accumulation in the rift lakes. In this study, conducted in four river catchments on the Wes...
Article
Full-text available
Exposure to volcanic ash is a long-standing health concern for people living near active volcanoes and in distal urban areas. During transport and deposition, ash is subjected to various physicochemical processes that may change its surface composition and, consequently, bioreactivity. One such process is the interaction with anthropogenic pollutan...
Article
Full-text available
Effective disaster risk reduction (DRR) presupposes awareness among key stakeholders on the causal factors that exacerbate disaster risks as well as a feeling of ownership over proposed DRR measures. Yet, the prevailing top-down communication of risk and the expert-centered knowledge have a limited impact in bringing significant positive change. Se...
Conference Paper
Full-text available
Volcanoes are extremely dynamic landforms. They grow by the accumulation of eruptive products and intrusions and degrade by a range of erosion processes such as superficial runoff, chemical and physical weathering, fluvial and glacial incision, and mass movements. In this study, we aim at documenting and quantifying the morphology of natural compos...
Article
The Philippine Island Arc has a large number of volcanoes with diverse morphologies, making it an ideal location to study the factors controlling the morphology and spatial distribution of island arc volcanoes. We have identified 731 volcanic edifices using the SRTM 30 m digital elevation models, and computed their quantitative morphology using the...
Preprint
Full-text available
Granular materials are a useful analogue for the Earth’s crust in laboratory models of deformation. Constraining their mechanical properties is critical for such model’s scaling and interpretation. Much information exists about monomineralic granular materials, such as quartz sand, but the mechanical characteristics of bimineralic mixtures, such as...
Article
Freshly erupted volcanic ash contains a range of soluble elements, some of which can generate harmful effects in living cells and are considered potentially toxic elements (PTEs). This work investigates the leaching dynamics of ash-associated PTEs in order to optimize a method for volcanic ash respiratory hazard assessment. Using three pristine (un...
Article
The continued significant impacts of disasters from natural hazards raise questions regarding the epistemic commensurability of measures recommended to achieve substantial disaster risk reduction. Using the case of Flood Risk Reduction (FRR), this study critically reviews key scientific literature on the epistemic foundations of the indigenous, sci...
Conference Paper
now published: https://www.researchgate.net/publication/350742630_Assessing_the_biological_reactivity_of_organic_compounds_on_volcanic_ash_implications_for_human_health_hazard AGU abstract: Volcanic ash eruptions may severely impact population living near an active volcano and in distal urban areas and are a cause of continuous health concern. Dur...
Conference Paper
The population resident in areas of the East African Rift system (EARS) is faced with serious problems associated with the availability and the quality of the drinking water. Drinking water supply largely relies on the groundwater wells and springs and is characterised by elevated fluoride concentration (> 1.5 mg/L), resulting from the interactions...
Article
Full-text available
As space-based Earth observations are delivering a growing amount and variety of data, the potential of this information to better support disaster risk management is coming into increased scrutiny. Disaster risk management actions are commonly divided into the different steps of the disaster management cycle, which include: prevention, to minimize...
Presentation
Full-text available
In the Arusha volcanic region in northern Tanzania, within the eastern branch of the East African Rift, water shortage is common and much of the surface water carries unacceptable levels of dissolved fluoride; hence groundwater is the main source of drinking water. Unfortunately, the quality of groundwater in this region is also very poor due to a h...
Conference Paper
Full-text available
In the Arusha volcanic region in northern Tanzania, within the eastern branch of the East African Rift, water shortage is common and much of the surface water carries unacceptable levels of dissolved fluoride; hence groundwater is the main source of drinking water. Unfortunately, the quality of groundwater in this region is also very poor due to a h...
Article
Full-text available
Lahars impose significant secondary hazards on highly populated volcanic islands by remobilizing volcanic ash deposits. Karthala, on Grande Comore Island, is a relatively young and poorly eroded basaltic shield volcano with sporadic occurrence of ash-forming phreatic eruptions. In 2005, two mildly explosive episodes emplaced tephra blankets on the...
Conference Paper
The recognized added value of indigenous practices continues to support arguments for integrating indigenous knowledge into Flood Risk Reduction (FRR). This, however, remains hampered by the limited understanding of the context of indigenous FRR. This study investigates the long recorded indigenous FRR practices in the Rwenzori (Uganda) over the la...
Article
Information about resettlement preferences is an important prerequisite for the success of voluntary resettlement as a disaster risk reduction strategy. Yet, even in conditions where individual preferences for resettlement are met, resettlement programs may fail. In this study, we confront individual preferences for resettlement with obstacles to r...
Article
Volcanoes display diverse morphologies as a result of the complex interplay of several constructive and destructive processes. Scaled analogue models offer a tool to isolate and characterize the different processes. Here, we investigate the interplay between volcano growth and deformation caused by an underlying strike-slip fault through simple ana...
Article
Two end‐member conceptual models are used to describe deformation of the Earth's crust induced by magma intrusion. “Mode I” fracturing assumes tensile, or opening‐mode, elastic deformation, while “Mode II” fracturing assumes plastic shear‐mode deformation around a viscous indenter. Field observations of both mechanisms exist, but it remains unclear...
Data
This data set reports on the methodologies and results of geochemical analysis carried out on samples of magmatic rock, calcite and sedimentary rocks of Hovedoya Island, Oslo fjord, Norway, in the framework of the publication by Poppe et al. (2020; Geochemistry, Geophysics, Geosystems; https://doi.org/10.1029/2019GC008685). The major and trace elem...
Article
Regional landslide inventories are often prepared by several different experts, using a variety of data sources. This can result in a combination of polygon and point landslide data, characterized by different meanings, uncertainties and levels of reliability. The propagation of uncertainties due to such heterogeneous data is a relevant issue in st...
Article
Full-text available
Nyiragongo (Democratic Republic of Congo) erupts fluid, fast-moving, foidite lavas. Nearby Nyamuragira frequently erupts less mobile tephrite lavas. Nyamuragira flows rarely threaten urbanized areas, but Nyiragongo flows threaten Goma (pop. ~900,000) and surrounding villages, resulting in fatalities in 1977 and 2002. We report new laboratory measur...
Article
Full-text available
Goma city, at the eastern border of DRCongo, is highly exposed to natural hazards, especially from Nyiragongo volcano, located directly North of it. In January 2002, the city centre of Goma was devastated by lava flows and several thousands of people were temporarily displaced. Defining and quantifying population vulnerability to natural hazards, a...
Conference Paper
Full-text available
Gully erosion is a process whereby runoff water concentrates over short periods and removes the soil, sometimes to considerable depths (Poesen et al., 2003). Landslides include a range of processes by which slope material is displaced under the force of gravity (Hungr et al., 2014). Gullies and landslides play an essential role in landscape evoluti...
Conference Paper
Despite recognition that traditional indigenous capacities could guide effective Flood Risk Management (FRM) in developing communities, documenting and validating those capacities remain a challenge. Contributing to addressing this challenge, this study reconstructs flood risk and FRM of rural communities in Uganda over the last decades. The study...
Presentation
Full-text available
In the Arusha volcanic region in northern Tanzania, within the eastern branch of the East African Rift, water shortage is common and much of the surface water carries unacceptable levels of dissolved fluoride; hence groundwater is the main source of drinking water. Unfortunately, the quality of groundwater in this region is also very poor due to a h...
Article
Studying the causes and triggers of landslides is essential to understand the key process of hillslope evolution and the hazards they generate. Such understanding is crucial in tropical areas where landslide impacts are high and on the rise, and the dearth of accurate processes characterisation is large. Here we investigate the timing and the mecha...
Article
Full-text available
Development of hazard maps is one of the measures promoted by the international community to reduce risk. Hazard maps provide information about the probability of given areas to be affected by one or several hazards. As such they are useful tools to evaluate risk and support the development of safe policies. So far studies combining hazard mapping...
Article
Full-text available
Magma intrusions grow to their final geometries by deforming the Earth's crust internally and by displacing the Earth's surface. Interpreting the related displacements in terms of intrusion geometry is key to forecasting a volcanic eruption. While scaled laboratory models enable us to study the relationships between surface displacement and intrusi...
Article
Effective disaster risk reduction is often hampered by a general scarcity of reliable data collected on disastrous events, particularly in the Global South. Novel approaches are therefore necessary to alleviate this constraint, particularly with regard to reducing extensive risks. A geo-observer network, consisting of 21 reporters, was established...
Article
Full-text available
Development of hazard maps is one of the measures promoted by the international community to reduce risk. Hazard maps provide information about the probability of given areas to be affected by one or several hazards. As such they are useful tools to evaluate risk and support the development of safe policies. So far studies combining hazard mapping...