Disaster Advances

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Disaster Advances





Potential risk analysis of urban post-earthquake fire based on attribute recognition and evidence theory

Liu Xiaoran, Wang Wei* and Dong Tingting

For the influence factors' complexity of urban post-earthquake fire, the attribute recognition theory and the evidence theory were proposed for the potential risk analysis of urban post-earthquake fire. First, the model of attribute recognition based on the principle of maximum entropy was established to eliminate all kinds of uncertainty to max; secondly, the evaluation indicators for urban post-earthquake fire were presented in terms of urban disaster hazard, exposure and vulnerability of disaster bearing body, disaster prevention and mitigation capability. Meanwhile, the grading standards of evaluation index were given; finally, potential risk analysis for post-earthquake fire within a city was provided to validate its efficiency and feasibility by the evidence theory.

The results indicate that the middle and higher risk area will reach 50.20%, 61.00% and 64.90% respectively when VI, VII, VIII-degree earthquake occurs. In this study, we verify the application of attribute recognition and evidence theory for potential risk assessment of urban post-earthquake fire and provide a measurable and achievable approach for the potential risk assessment of urban post-earthquake fire.

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Noise mapping of a bauxite mine using measured noise and GPS data

Tripathy Debi Prasad and Datrika Srinivas Rao*

This study aimed to produce a noise map by determining the noise levels in the different parts of the bauxite mine and to compare them with the Directorate General of Mines Safety (DGMS) prescribed permissible limits. A total of 654 points whose positions are measured by Global Positioning System (GPS), were collected from the mine at varying intervals according to the International Organization for Standardization (ISO) and DGMS guidelines to measure sound pressure levels. The GPS receiver interfaced with the real-time octave band analyzer allowed simultaneous measurement of position and noise level data. Measured points are exported to ArcGIS software for generating the noise map.

Results showed that noise levels were higher than the permissible limits in most parts of the mine, the maximum and minimum average noise levels were 104 dB(A) and 50 dB(A), logarithmic mean equivalent A- weighted sound pressure level (LAeq) was 67 ± 12 and LAeq ranging between 81-90 dB (A) at workplaces of dozer and pay loader, 71-80 dB (A) at shovel working locations and 50-60 dB (A) at different haul roads respectively. The results suggest that integrating noise data with GPS can enhance visualization of the noise map and is likely to be more effective at informing policy decision-making, and necessary steps to be taken against high noise levels.

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Intervention strategies to mitigate risk in adventure tourism: A Haddon matrix perspective

Piramanayagam Senthilkumaran* and Seal Partho Pratim

Adventure tourism is a rapidly expanding tourism activity around the world. The risk in adventure tourism is very real which may lead to tragedies. There is an increasing number of people involved in adventure tourism without prior knowledge and level of risk. The management of risk in adventure tourism is critical for its sustainability. If the risk has not managed efficiently, it will lead to loss of firms’ reputation, money and customer confidence.

The objective of this research is to develop a framework which may help tourism planners and adventure tour operators in the identification of risk and to develop strategies to mitigate and minimize the risk by applying Haddon matrix.

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Meta-synthetic evaluation of PPP project risk for large-scale disaster prevention and control based on WSR

Wang Yanwei*, Huang Yi, Li Jing and Wang Wei

PPP model can effectively solve the problem that if implementation efficiency of the large-scale disaster prevention project is not high, then how to carry out comprehensive and scientific evaluation of project risk for large-scale disaster prevention which is a difficult problem at present. According to the characteristics changing over time, large-scale disaster prevention and control of PPP project risk can be evaluated from three aspects: "history", "present" and "future". At the same time, we should take into account the "Renli system", "Shili system" and "Wuli system" of project risk for large-scale disaster prevention and control and establish comprehensive evaluation model of PPP project risk for large scale disaster prevention and control based on WSR through the example application.

The results show that the integrated evaluation method can be practical in realizing the comprehensive evaluation of PPP project risk for large-scale disaster prevention and control.

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Poor planning of underground pipe network responsible for occurrence of urban inland inundation hazards in China

Guo An and Shanzhong Qi*

Although flood hazards are caused by the irrational land use structure and pattern and the lack of consideration of physical environment during urbanization in China, poor urban planning of underground pipe network is also responsible for occurrence of urban inland inundation hazards which is being a new type of human-made disaster in China owing to the poor urban planning of underground pipe network.

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Resolution of dispersion image obtained from active MASW survey

Taipodia Jumrik, Baglari Dipjyoti and Dey Arindam*

This review provides a critical overview of the various aspects related to the Active MASW survey in terms of the wavefield generation, data acquisition, dispersion analysis and the resolution of the dispersion image. The precision of the outcome of an active MASW survey i.e. the obtained shear wave velocity profile, depends largely on the resolution of the dispersion image which in turn, is governed by the choice of several parameters related to data acquisition, data pre-processing and image stacking. The review illustrates several gaps in the understanding to develop a high-resolution dispersion image.

It is observed that there are no existing recommendations to generate a high-resolution dispersion image, most of the guidelines being case-specific and site-sensitive. This understanding opens up new vistas of research in the domain of developing a high-resolution dispersion image from active MASW survey.

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