A5058798659- Landslides and related hazards
- Disaster Management and Resilience
- Flood Risk Assessment and Management
- Complex Systems and Time Series Analysis
- Fire effects on ecosystems
- Climate variability and models
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Tree Root and Stability Studies
- Meteorological Phenomena and Simulations
- Infrastructure Resilience and Vulnerability Analysis
- Time Series Analysis and Forecasting
- Anomaly Detection Techniques and Applications
- Seismology and Earthquake Studies
- Geographic Information Systems Studies
- Disaster Response and Management
- Hydrology and Drought Analysis
- Geotechnical Engineering and Analysis
- Tropical and Extratropical Cyclones Research
- Tree-ring climate responses
- Theoretical and Computational Physics
- Planetary Science and Exploration
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Remote Sensing in Agriculture
Durham University
2023-2024
King's College London
2014-2023
British Geological Survey
2022
Institute of Geography of the Slovak Academy of Sciences
1980-2014
National Centre for Earth Observation
2009
Cornell University
1996-2008
University of Oxford
2003-2005
Indiana University Bloomington
2005
University of Auckland
2005
University of California, Irvine
2005
Abstract Landslides are generally associated with a trigger, such as an earthquake, rapid snowmelt or large storm. The landslide event can include single many thousands. frequency–area (or volume) distribution of quantifies the number landslides that occur at different sizes. We examine three well‐documented events, from Italy, Guatemala and USA, each triggering mechanism, find areas for all well approximated by same three‐parameter inverse‐gamma distribution. For small this has exponential...
Despite the many complexities concerning their initiation and propagation, forest fires exhibit power-law frequency-area statistics over orders of magnitude. A simple fire model, which is an example self-organized criticality, exhibits similar behavior. One practical implication this result that distribution small medium can be used to quantify risk large fires, as routinely done for earthquakes.
This paper presents a broad overview, characterization, and visualization of the interaction relationships between 21 natural hazards, drawn from six hazard groups (geophysical, hydrological, shallow Earth, atmospheric, biophysical, space hazards). A synthesis is presented identified these using an accessible visual format particularly suited to end users. Interactions considered are primarily those where primary triggers or increases probability secondary hazards occurring. In this we do...
Abstract Aim To use global databases to (1) provide a visualization of geographical patterns species invasions, origins and pathways (2) depict the international uptake legislative policy responses invasive alien (IAS). Location Global. Methods Patterns recorded invasions introduction were mapped visualized using data from Global Invasive Species Database (GISD) CABI Compendium (CABI ISC), along with associated legal instruments relevant IAS compiled ECOLEX database. A novel indicator...
Abstract. We review work on extreme events, their causes and consequences, by a group of European American researchers involved in three-year project these topics. The covers theoretical aspects time series analysis value theory, as well the deterministic modeling via continuous discrete dynamic models. applications include climatic, seismic socio-economic along with prediction. Two important results refer to (i) complementarity spectral terms part its power spectrum; (ii) need for coupled...
Abstract. This paper combines research and commentary to reinforce the importance of integrating hazard interactions interaction networks (cascades) into multi-hazard methodologies. We present a synthesis differences between multi-layer single-hazard approaches that integrate such interactions. suggests ignoring important environmental anthropogenic processes could distort management priorities, increase vulnerability other spatially relevant hazards or underestimate disaster risk. In this...
This paper presents a broad overview, characterisation and visualisation of the role 18 anthropogenic process types in triggering influencing 21 natural hazards, hazard interactions. Anthropogenic are defined as being intentional, non-malicious human activities. Examples include groundwater abstraction, subsurface mining, vegetation removal, chemical explosions infrastructure (loading). Here we present systematic classification types, organising them into three groups according to whether...
This paper aims to provide a five-step conceptual framework analyze the impacts built environment from multi-hazard interactions. Our methodology includes critical literature review and stakeholder workshops. framework's five steps are following: (I) identify hazards their interactions, (II) modelling, (III) analysis of hazards' spatio-temporal evolution impacts, (IV) identification impact (V) risk or assessment. approach is based on systematic spatial temporal determine potential In Step...
Wildfires statistics for the conterminous United States (U.S.) are examined in a spatially and temporally explicit manner. We use high-resolution data set consisting of 88,916 U.S. Department Agriculture Forest Service wildfires over time period 1970-2000 consider wildfire occurrence as function ecoregion (land units classified by climate, vegetation, topography), ignition source (anthropogenic vs. lightning), decade. For U.S., we (i) find that exhibit robust frequency-area power-law...
Power spectral analyses of soil moisture variability are carried out from scales 100 m to 10 km on the microwave remotely-sensed data Washita experimental watershed during 1992. The power spectrum S(k) has an approximate power-law dependence wave number k with exponent −1.8. This behavior is consistent a stochastic differential equation for at point, and it important consequences frequency-size distribution landslides. We present cumulative distributions landslides induced by precipitation...
In this paper, we examine self-affine time series and their persistence. Time are defined to be if power-spectral density scales as a power of frequency. Persistence can classified in terms range, short or long strength, weak strong. Self-affine scale-invariant, thus they always exhibit long-range Synthetic generated using the Fourier method. We generate fractional Gaussian noises (fGns), −1⩽β⩽1, where β is exponent. These summed give Brownian motions (fBms), 1⩽β⩽3, fractals with fractal...
Abstract. We focus here on a mainland Continental Portuguese Rural Fire Database (PRFD) that includes 450 000 fires, the largest such database in Europe terms of total number recorded fires 1980–2005 period. In this work, we (a) list most important factors for triggering and controlling fire regime Portugal, (b) describe dataset's production, (c) discuss procedures adopted to identify correct different data inconsistencies, creating modified PRFD which use make available as Supplement, (d)...
We consider the frequency-size statistics of two natural hazards, forest fires and landslides. Both appear to satisfy power-law (fractal) distributions a good approximation under wide variety conditions. Two simple cellular-automata models have been proposed as analogs for this observed behavior, fire model sand pile The behavior these can be understood in terms self-similar inverse cascade. For cascade consists coalescence clusters trees; metastable regions.
Abstract A catalogue of historical landslides, 1951–2002, for three provinces in the Emilia‐Romagna region northern Italy is presented and its statistical properties studied. The consists 2255 reported landslides based on archives chronicles. We use two measures intensity landsliding over time: (i) number a day ( D L ) (ii) an event S ), where one or more consecutive days with landsliding. From 1951–2002 our study area there were 1057 1 ≤ ≤?45 per day, 596 events 129 event. In first set...