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At least 775 records · Page 43Linked to original sources
PubMed2002

Historical and geological evidence for seismic origin of newly recognized landslides in southeastern Sicily, and its significance in terms of hazard.

Old, large, and dormant landslides were unexpectedly found in southeastern Sicily, a territory of known seismicity but commonly considered as landslide-free or almost so. Purposely undertaken investigations revealed that: (1) these landslides are scarcely compatible with the local geoclimatic environment; (2) they usually show low-angle basal shear surfaces, despite the fact that the properties of the forming material are generally good; (3) they fulfill the known relationships between earthquake magnitude and epicenter-landslide distance; (4) sources coeval with high-energy historical earthquakes occurred in 1169, 1542 and 1693 testify to the occurrence of earthquake-triggered landsliding; and (5) documentary material (presented here for the first time) correlates with certainty a specific landslide to the 1693 earthquake. This geological and historical evidence, accompanied by the absence of contrasting elements, leads us to conclude that these landslides are earthquake-triggered. Because of their typological and geometrical characteristics, nearly all landslides can be reactivated, which has serious implications in terms of hazard, particularly with respect to lines of communication. Obviously, every action aimed at preventing or mitigating risks must start from the awareness of the causative processes, a condition substantially unsatisfied at the moment in SE Sicily. The paper concludes by emphasizing the opportunity not to trust excessively beliefs that, although shared, have never been really checked.

Data Collection↗
PubMed2004

Rockfall hazard and risk assessment along a transportation corridor in the Nera Valley, central Italy.

Rockfalls are a common type of fast-moving slope failures, and in many countries they represent the primary cause of landslide fatalities. We present a methodology to ascertain rockfall hazard and to determine the associated risk along transportation networks. The proposed methodology is based on the combined analysis of the recurrence of rockfall events, determined from historical information, the frequency-volume statistics of rockfalls, obtained from inventories of recent rockfall triggering events, and the results of a physically based, spatially distributed rockfall simulation model used to determine rockfall hazard. The available information on rockfall hazard is combined in a Geographic Information System with a map of the transportation network to identify the road sections potentially subject to rockfalls. Information on the location and type of rockfall defensive measures, including revetment nets, elastic fences, concrete walls, and artificial tunnels, is used to estimate the efficacy of the defensive structures and to determine the level of the residual rockfall risk along the roads. To illustrate the methodology, we discuss an application in a 48-km2 area in the Nera River valley, in the Umbria Region of central Italy, where rockfalls are abundant, and where considerable investments were recently made to mitigate rockfall risk.

Disaster Planning↗
PubMed2005

Consensus Seasonal Flood Forecasts and Warning Response System (FFWRS): an alternate for nonstructural flood management in Bangladesh.

Despite advances in short-range flood forecasting and information dissemination systems in Bangladesh, the present system is less than satisfactory. This is because of short lead-time products, outdated dissemination networks, and lack of direct feedback from the end-user. One viable solution is to produce long-lead seasonal forecasts--the demand for which is significantly increasing in Bangladesh--and disseminate these products through the appropriate channels. As observed in other regions, the success of seasonal forecasts, in contrast to short-term forecast, depends on consensus among the participating institutions. The Flood Forecasting and Warning Response System (henceforth, FFWRS) has been found to be an important component in a comprehensive and participatory approach to seasonal flood management. A general consensus in producing seasonal forecasts can thus be achieved by enhancing the existing FFWRS. Therefore, the primary objective of this paper is to revisit and modify the framework of an ideal warning response system for issuance of consensus seasonal flood forecasts in Bangladesh. The five-stage FFWRS-i) Flood forecasting, ii) Forecast interpretation and message formulation, iii) Warning preparation and dissemination, iv) Responses, and v) Review and analysis-has been modified. To apply the concept of consensus forecast, a framework similar to that of the Southern African Regional Climate Outlook Forum (SARCOF) has been discussed. Finally, the need for a climate Outlook Fora has been emphasized for a comprehensive and participatory approach to seasonal flood hazard management in Bangladesh.

Bangladesh↗
PubMed2005

Public participation mechanisms in environmental disasters.

This paper examines the role of public participation mechanisms in certain major environmental disasters. It examines situations in which people's lifestyles or their lives have been directly threatened, and thus elicited citizen participation. Threatening issues often seem morally, physically, socially, economically, religiously, and otherwise unacceptable to a group. As will be presented in this paper, citizens voluntarily participate in a community activity when they see that their way of life has been threatened. An introductory historical perspective, the legal framework upon which it is based, and background information on the participatory mechanisms, all emphasizing the importance and need for empowering citizens with participatory skills so as to bring changes in the existing educational, legal, and social systems are presented. The major environmental accidents/disasters of Minamata, Japan; Bhopal, India; Seveso, Italy; Chernobyl, Ukraine; and Exxon-Valdez, Alaska are discussed, mainly to indicate the reaction, and the participatory mechanisms used by the affected communities in each of the sudden disasters that occurred. If citizens worldwide had been active participants in the environmental issues, it is quite possible that we would have experienced fewer environmental accidents.

Accidents↗
PubMed2006

Reducing the effects of dredged material levees on coastal marsh function: sediment deposition and nekton utilization.

Dredged material levees in coastal Louisiana are normally associated with pipeline canals or, more frequently, canals dredged through the wetlands to allow access to drilling locations for mineral extraction. The hydrologic impact on marshes behind the levee is of concern to coastal resource managers because of the potential impact on sediment transport and deposition, and the effect on estuarine organism access to valuable nursery habitat. This study examined the effects of gaps in dredged material levees, compared to continuous levees and natural channel banks, on these two aspects of marsh function. Field studies for sediment deposition were conducted biweekly for a year, and nekton samples were collected in spring and fall. Variation in nekton density among study areas and landscape types was great in part because of the inherent sampling gear issues and in part because of differences in characteristics among areas. Nekton densities were generally greater in natural compared to leveed and gapped landscapes. Differences in landscape type did not explain patterns in sediment deposition. The gaps examined appear to be too restrictive of marsh flooding to provide efficient movements of floodwaters onto the marsh during moderate flooding events. The "trapping" effect of the levees increases sediment deposition during extreme events. Gapping material levees may be an effective method of partially restoring upper marsh connection to nekton, but this method may work best in lower elevation marshes where nekton use is greater.

Disaster Planning↗
PubMed2005

The impact of flooding on the mental health of affected people in South Korea.

In this study we hypothesized that the residents in the disaster-exposed group would experience higher levels of stress, anxiety, depression and post-traumatic stress disorder compared to those in the non-disaster group. Furthermore, this would result in an increased need for health-related welfare in the disaster-exposed group. Our data supports both hypotheses, and these research findings are consistent with a growing body of research that supports such a conclusion.

Adolescent↗
PubMed2005

Determinants of response in a longitudinal health study following the firework-disaster in Enschede, The Netherlands.

Very few longitudinal health studies after disasters published data on the determinants of loss to follow up. However, these determinants provide important information for future disaster studies to improve their response and reduce selection bias. For this purpose we analyzed the data of a longitudinal health survey which was performed among residents and emergency workers, at 3 weeks (n = 3662) and at 18 months (n = 2769) after a major firework disaster in The Netherlands (Enschede, May 13, 2000). The response was lower among immigrants (54%) than among native Dutch (81%). Severe damage to the house due to the disaster (OR: 1.8; 95% CI: 1.1-3.0) and being involved as an emergency workers (OR: 2.1; 95% CI: 1.2-3.4) were associated with higher response among native Dutch, while this was not the case among immigrants. Non-western immigrants with health problems in the first study were more likely to participate in the second study (for example physical symptoms OR: 2.5: 95% CI: 1.4-4.4), while the native Dutch with these symptoms were less likely to participate (OR: 0.7; 95% CI: 0.5-0.9). In conclusion, disaster-related characteristics were associated with higher response in native Dutch. Health problems were associated with higher response among non-western immigrants and with lower response among the native Dutch.

Accidents↗
PubMed2006

Long term fire scar monitoring with remote sensing in Northern Namibia: relations between fire frequency, rainfall, land cover, fire management and trees.

A cost-effective method was developed to map fire scars on Quicklooks of Landat TM imagery. The method was compared with a full resolution Landsat image using visual interpretation and supervised classification using the Maximum Likelihood procedure, resulting in a high degree of agreement between methods. A long time series of fire scars was developed using all available Landsat Quicklooks between 1989 and 2001 for an area of 63000 sq km in north-east Namibia. Between 27 and 51% of the study area burned annually, while only 10% of the area did not burn between 1989 and 2001. Not-burned areas were mainly settled areas and permanent wetlands. 33% of the area burned between 5 and 7 times during the 13 years indicating a high frequency overall. Rainfall and livestock had little influence on burned areas. In 1996 formal fire management started in a portion of the study area consisting of building firebreaks and holding awareness programs. A comparison of burned areas before and after the intervention started allowed evaluating its effectiveness. The area where the formal fire management program was undertaken showed a significant decrease in burned area. It is suggested that awareness campaigns rather than firebreaks contributed to this decrease. Selected tree population data were compared with fire frequencies. Differences in tree occurrence, regeneration, and stem diameter distributions between low and high fire frequencies could be detected and explained with known responses of the species to fire. This suggests that the observed time series is representative of a long-term fire regime in the area.

Biomass↗
PubMed1990

Management of burns in major disasters.

This paper discusses the problems of handling major burns in disasters with particular reference to the disaster that occurred in Bradford. Several major features of the Bradford fire, in which 56 people died, made its management much simpler than might be expected in subsequent burns disasters; these are discussed. Lessons that have been learned from handling this disaster are indicated.

Burns↗
PubMed1989

Technological disaster--survival and bereavement.

Differences between natural and man-made disaster are described, deleterious psychological effects of technological components catastrophe appearing to be longer lasting. The psychological components of the experience of survival are outlined, and the concept of post-traumatic stress disorder located within this. Bereavement reactions, complicated by enhancement of the factors accompanying sudden, violent death, are also described, and risk factors noted. Finally, the development of community-based preventative mental health programmes which are acceptable to victims are detailed, emphasising restoration of the victims' sense of control over their own lives and the value of self-help. The role of counselling and specialist treatment is placed in this context.

Bereavement↗
PubMed1990

Managing ecological upheavals: a Third World perspective.

This paper seeks to examine the genesis of ecological upheavals which are reflecting the smouldering ecological crisis in the world. The natural as well as man-made mass disasters have more propensity to affect the developing countries of the Third World. The data presented in tabular form in the paper reveals their increasing 'killer potential'. The present inquiry shows that the non-sustainable development patterns and practices by the Third World countries have brought them on to the brink of irreversible environmental consequences. The study underlines that due to lack of adequate disaster identification, prevention and management capabilities these countries suffer the worst. It suggests that a regional level cooperation, on the lines of the SAARC, is suitable to streamline joint efforts to combat mass disasters. The study also highlights the possible legal responses and role of lawyers in this respect. Some of the emerging international eco-standards provide a basis for resolving disputes concerning transboundary effects of disasters. A comprehensive global convention on mass disasters, encompassing sharing of data and transfer of disaster management technology to developing countries is now 'need of the hour'.

Accidents, Occupational↗
PubMed1993

Health related response to natural disasters: the case of the Bangladesh cyclone of 1991.

This paper evaluates the health related response to large natural disasters using the example of the recent Bangladesh cyclone of 1991. After providing a description of the extent of the health response, it focuses on three major issues: (i) assessment of needs (ii) coordination of major groups involved in health relief and rehabilitation efforts and (iii) appropriateness and effectiveness of the health response in terms of definable outcome criteria. The conclusions are that in the case of the Bangladesh cyclone: (a) the assessment of needs was more reactive rather than anticipatory and was not based on any systematic data gathering from the field; (b) in contrast to previous disaster situations there was excellent coordination of the major groups involved in the aid process (the government, the armed forces and non-governmental organizations) and (c) given the caveat of inadequate baseline information, it appears that the health response was prompt and effective in preventing any increase in mortality from diarrheal diseases and measles. The reasons for the deficiencies and successes of the health response are analysed and finally a list of detailed recommendations to facilitate future disaster/cyclone management and response is provided.

Bangladesh↗