Risk Assessment of Geological Hazard in Wudu Area of Longnan City, China

2010 ◽  
Vol 39 ◽  
pp. 232-237 ◽  
Author(s):  
Shou Yun Liang ◽  
Yun Xing Wang ◽  
Yu Wang
Keyword(s):  
Risk Assessment ◽  
Hazard Assessment ◽  
Human Life ◽  
Geological Hazard ◽  
Risk Area ◽  
High Risk Area ◽  
Damage Degree ◽  
Geological Conditions ◽  
Geological Disaster ◽  
Medium Risk

Risk assessment of geological hazard is the study of damage degree of human life and property affected by the geological disaster. It is of great importance for reducing harm level of geological hazard fatalness, preventing and controlling of geological disaster. As an example in Wudu area of Longnan City, we choose topography, lithology, meteorology, hydrology and human activity as the hazard assessment factors, on the basis of detailed investigation of geological conditions in study area. Then, adding the importance of the residents activity area as a risk assessment factor, we have finished the geological hazard assessment and its risk assessment by GIS combined with AHP. The result shows that the proportions of geological hazard risk of non-risk, low-risk, medium-risk and high-risk area are respectively 31%, 14%, 25% and 30%.

OIL POLLUTION RISK ASSESSMENT AND PREPAREDNESS IN THE EAST MEDITERRANEAN

2005 ◽  
Vol 2005 (1) ◽  
pp. 259-264 ◽  
Author(s):  
Natalia Martini ◽  
Roberto Patruno
Keyword(s):  
Risk Assessment ◽  
High Risk ◽  
Mediterranean Basin ◽  
Oil Spills ◽  
Oil Pollution ◽  
Eastern Mediterranean ◽  
East Mediterranean ◽  
Risk Area ◽  
Data Set ◽  
High Risk Area

ABSTRACT The East Mediterranean is an area of high oil traffic because it is an important transit centre between Middle Eastern/Russian oil and the western European countries/USA. Recent traffic developments show that the importance of this centre is expected to increase. ITOPF and REMPEC carried out a joint risk assessment study of the area. For the purpose of this paper the “East Mediterranean” includes the Adriatic Sea and the East Mediterranean Basin; this was necessary to carry out a comprehensive analysis of the issue, as the oil traffic in the Adriatic is strictly linked with the activities occurring in the East Mediterranean basin. The aim of this study is to test the hypothesis that the East Mediterranean is a high risk area for oil spills. For this analysis the ITOPF oil spill data set was used (1974 to 2003). Results show that the majority of spills involving a quantity of less than 7 tonnes are operational, whereas medium and major spills result from accidents. Crude oil spills appear to have the highest occurrence in each of the spill size categories, with the highest value for major spills; the accident occurrence appears to be closely related to the import flow. A risk analysis for the East Mediterranean has been overdue, as this area is characterised by a very heterogeneous level of preparedness and response, by several sensitive areas, and a lack of active bi/tri-lateral cooperation agreements. It is concluded that the Eastern Mediterranean is a high risk area for tanker spills, and the risk is likely to increase with the predicted increases in tanker traffic.

Hazard Evaluation for Seawater Intrusion in the South of Laizhou Bay

2014 ◽  
Vol 1010-1012 ◽  
pp. 317-320
Author(s):  
Guang Quan Chen ◽  
Wen Quan Liu ◽  
Xing Yong Xu ◽  
Qiao Su
Keyword(s):  
Seawater Intrusion ◽  
Hazard Assessment ◽  
Evaluation Process ◽  
Information Value ◽  
Hazard Evaluation ◽  
Laizhou Bay ◽  
Geological Condition ◽  
The South ◽  
Risk Area ◽  
High Risk Area

Laizhou Bay is the most typical and serious region suffering from the geo-hazard of the seawater intrusion in China. The information value model and GIS are used for the hazard assessment study of seawater intrusion disaster in the Laizhou Bay. The assessment indexes are conceived through choosing the factors such as mineralization, groundwater level, geological condition, intensity of human activities and offshore distance . ArcGIS software is applied involving in data collection, data management, data analysis and evaluation process expressing. Finally, the hazard assessment about seawater intrusion disaster is classed into high, medium and low. The result shows that the boundary between the more dangerous and less dangerous zone is the line of Shouguang-Hanting-Changyi. The high-risk area is accounted for more than 46% of the evaluation area. The saltwater under the south of Laizhou plain is main source of the seawater intrusion disaster, and pumping the underground freshwater and saline groundwater is the induced conditions of the seawater intrusion disaster.

scholarly journals Local scale multiple quantitative risk assessment and uncertainty evaluation in a densely urbanised area (Brescia, Italy)

2012 ◽  
Vol 12 (11) ◽  
pp. 3387-3406 ◽  
Author(s):  
S. Lari ◽  
P. Frattini ◽  
G. B. Crosta
Keyword(s):  
Risk Assessment ◽  
Quantitative Risk Assessment ◽  
Exceedance Probability ◽  
Point Estimate ◽  
Economic Activities ◽  
Industrial Accidents ◽  
Risk Area ◽  
High Risk Area ◽  
Territorial Planning ◽  
First Order Second Moment

Abstract. The study of the interactions between natural and anthropogenic risks is necessary for quantitative risk assessment in areas affected by active natural processes, high population density and strong economic activities. We present a multiple quantitative risk assessment on a 420 km2 high risk area (Brescia and surroundings, Lombardy, Northern Italy), for flood, seismic and industrial accident scenarios. Expected economic annual losses are quantified for each scenario and annual exceedance probability-loss curves are calculated. Uncertainty on the input variables is propagated by means of three different methodologies: Monte-Carlo-Simulation, First Order Second Moment, and point estimate. Expected losses calculated by means of the three approaches show similar values for the whole study area, about 64 000 000 € for earthquakes, about 10 000 000 € for floods, and about 3000 € for industrial accidents. Locally, expected losses assume quite different values if calculated with the three different approaches, with differences up to 19%. The uncertainties on the expected losses and their propagation, performed with the three methods, are compared and discussed in the paper. In some cases, uncertainty reaches significant values (up to almost 50% of the expected loss). This underlines the necessity of including uncertainty in quantitative risk assessment, especially when it is used as a support for territorial planning and decision making. The method is developed thinking at a possible application at a regional-national scale, on the basis of data available in Italy over the national territory.

scholarly journals Framework of Spatial Flood Risk Assessment for a Case Study in Quang Binh Province, Vietnam

2020 ◽  
Vol 12 (7) ◽  
pp. 3058
Author(s):  
Chinh Luu ◽  
Hieu Xuan Tran ◽  
Binh Thai Pham ◽  
Nadhir Al-Ansari ◽  
Thai Quoc Tran ◽  
...  
Keyword(s):  
Risk Assessment ◽  
High Risk ◽  
Flood Risk ◽  
Agricultural Land ◽  
Human Life ◽  
Early Warning Systems ◽  
Flood Risk Assessment ◽  
Inundation Area ◽  
Medium Risk

Vietnam has been extensively affected by floods, suffering heavy losses in human life and property. While the Vietnamese government has focused on structural measures of flood defence such as levees and early warning systems, the country still lacks flood risk assessment methodologies and frameworks at local and national levels. In response to this gap, this study developed a flood risk assessment framework that uses historical flood mark data and a high-resolution digital elevation model to create an inundation map, then combined this map with exposure and vulnerability data to develop a holistic flood risk assessment map. The case study is the October 2010 flood event in Quang Binh province, which caused 74 deaths, 210 injuries, 188,628 flooded properties, 9019 ha of submerged and damaged agricultural land, and widespread damages to canals, levees, and roads. The final flood risk map showed a total inundation area of 64,348 ha, in which 8.3% area of low risk, 16.3% area of medium risk, 12.0% area of high risk, 37.1% area of very high risk, and 26.2% area of extremely high risk. The holistic flood risk assessment map of Quang Binh province is a valuable tool and source for flood preparedness activities at the local scale.

High risk of MS in Iranian immigrants in Gothenburg, Sweden

2010 ◽  
Vol 16 (9) ◽  
pp. 1079-1082 ◽  
Author(s):  
C. Ahlgren ◽  
J. Lycke ◽  
A. Odén ◽  
O. Andersen
Keyword(s):  
High Risk ◽  
Confidence Interval ◽  
Disease Onset ◽  
Population Based ◽  
Hazard Ratio ◽  
Risk Area ◽  
Iranian Immigrants ◽  
High Risk Area ◽  
Medium Risk ◽  
Iranian Patients

Background: In this study we investigated the risk of multiple sclerosis (MS) in migrants who had moved from Iran to Gothenburg, Sweden. Methods: Patients born in Iran were retrieved from a population-based cohort, which included 534 MS and clinically isolated syndrome patients, born 1959—1990, aged 10—39 years at disease onset in Gothenburg. The expected versus observed number of migrants from Iran was calculated. Results: The MS risk in the Iranian migrants in Gothenburg was several times higher than in Isfahan, Iran (hazard ratio 3.88, 95% confidence interval 2.17—6.40). Compared with the general population of Gothenburg, the observed number of 17 Iranian patients was higher than the expected value of 9.89 (hazard ratio 1.72, 95% confidence interval 1.00—2.75). Conclusion: Migration from a medium-risk to a high-risk area may increase the MS risk to that of the high-risk area.

Study on Power Transformer Fault Risk Assessment Method

2013 ◽  
Vol 433-435 ◽  
pp. 691-699
Author(s):  
Yong Xing Cao ◽  
Xing Shen ◽  
Qian Peng ◽  
Fan Liu ◽  
Xiao Hu Yan ◽  
...  
Keyword(s):  
Power Transformer ◽  
Assessment Method ◽  
Risk Area ◽  
Analytic Hierarchy ◽  
High Risk Area ◽  
Project Appraisal ◽  
Risk Assessment Method ◽  
Failure Severity ◽  
Medium Risk ◽  
Major Factors

Based on more than three hundred transformer accidents and some statistics data related, this paper manages to draw a standard classification table of transformer failure. 5 degrees of failure possibilities are classified in the paper: extremely high, high, general, low, extremely low. Besides, 4 major factors that affects risk of transformer failure severity are studied: direct lossmonitoring levelmaintenance cost and maintenance period. Also, failure severity of each risk source are classified into 5 levels: not serious, mild, ordinary, less serious, and serious, and Extensional Analytic Hierarchy Process (EAHP) and Extensional Project Appraisal Methods are used to evaluate the severity of risk of transformer failures. Last but not least, risk matrix has been built and divided into four parts: high risk area, critical risk area, medium risk area and low risk area. On that top, some maintenance strategies are proposed accordingly.

scholarly journals Risk assessment of geological disaster in the region of Primorsko Municipality

2021 ◽  
Vol 50 (3) ◽  
pp. 29-35
Author(s):  
Antoaneta Frantzova
Keyword(s):  
Risk Assessment ◽  
Geological Hazard ◽  
Assessment Methodology ◽  
Risk Matrix ◽  
Risk Profiles ◽  
Geological Disaster ◽  
First Time ◽  
Risk Assessment Methodology

Risk assessment methodology is described in detail and applied for assessing the geological hazard for potential landslides and earthquakes. This methodology follows the guidelines of ISO 31010 and the JRC recommendations, and is applied for the first time in Bulgaria. The obtained results have high practical applicability. The flexibility of the methodology allows the final result to be presented as either a risk matrix or risk profiles. It depends on the specific tasks, issues and scientific problems that need to be solved.

scholarly journals Applying a GIS based DRASTIC Model in the Assessment of Risk to Groundwater Resources Within the Underlying Aquifers in Part of Lagos State, Nigeria

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
O.S Oladeji
Keyword(s):  
High Risk ◽  
Water Resources ◽  
Anthropogenic Activities ◽  
Groundwater Resources ◽  
Annual Growth Rate ◽  
Risk Area ◽  
High Risk Area ◽  
Lagos State ◽  
Medium Risk ◽  
Vulnerability Map

Lagos, Nigeria is one of the megacities in Africa with an estimated annual growth rate of 8%, and its socio-economic growth has continually encouraged influx of people into the city. Hence, this has increased pressure on the underlying water resources with implications for public health and ecological related issues. In this study, anthropogenic induced risk posed to water resources within the underlying aquifers in part of Lagos State, Nigeria, was evaluated using qualitative DRASTIC modelling approach. Geo-hydrological data were acquired for site characterization and setting up of the model. The geology indicated multi-layered aquifer horizons, with extensive lateral lithological variations. The topography ranges between 1.5 and 60 m above mean sea level (amsl). The depth to groundwater is shallow, typically less than 1 m in the south, and a maximum depth of 20 m below ground level, in the north. A vulnerability map was developed from the cumulated sum of the DRASTIC index values. Anthropogenic activities within the study area were super-imposed on the vulnerability map to generate a risk map. The results show that 1% of the study area is designated as High-Vulnerability-High-Risk area. Also, High-Vulnerability-Medium-Risk and Medium-Vulnerability-High-Risk constitute 3% each of the area, while 16% and 25% were designated as Medium-Vulnerability-Medium-Risk and Low-Vulnerability-Medium-Risk, respectively. Although, based on the DRASTIC input parameters, approximately 75% of the area is designated as high and medium vulnerability, however absence of risk activities suggests no risk is posed to the underlying groundwater resource in approximately 52% of this delineated subarea.

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