Abstract:
Geological environment is defined as the combination of all kinds of geology factors, which influences on human survival and development in lithosphere. An original methodology was used for obtaining the information to reply to questions in the paper. It involves several stages: identifying the different geological hazard components, defining each phenomenon's threat matrix by crossing intensity and frequency indices, mapping the hazards, listing and mapping the exposed elements, analyzing their respective values in economic, functional and strategic terms, establishing typologies for the different element-at-risk groups and assessing their vulnerability to the various physical pressures produced by the hazard phenomena, and establishing risk maps for each of the major element-at-risk groups (population, infrastructures, vegetation, atmosphere).Keywords:
Vulnerability
Geologic hazards
Listing (finance)
Based on the MAPGIS,the design and development of geological hazard information system of Yiliang can help the user know the distribu tion and harness of geological hazard in the region and realize the management of the concerned material.
Geologic hazards
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The paper summarized the type of geologic hazard of this region, analyzed the geological background and formation mechanism of geologic hazard of it, and discussed the measures to prevent geologic hazard roundly, which base on field survey of geologic hazard and collecting information. At last, the paper brought forward the measures to prevent and supervise geologic hazard of the region.
Geologic hazards
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The geological hazard cause various ground deformation,the most common ground deformation are house cracks in hazard zone.This paper combines with the house crack investigation in mountainous area of Weining county,then summarizes the characteristics and genesis of crack house.Based on the features,the comparison analysis of the different characters between house crack which are caused by Engineering and by geological hazard is presented.At last the paper introduce the guiding significance of house crack during the geological hazard survey.
Geologic hazards
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According to the development and distribution characteristics of geological hazard in Guangxi Province,the paper introduces the great economic losses and casualties caused by geological hazard in recent years.In order to reduce these losses and avoid casualties,two approaches that play an effective role in preventing geological hazard in the daily management of geological hazard have been discussed.And then,the basic working processes and requirements of the approaches have been introduced in detail.One is to strengthen the knowledge popularization of geological hazard,enhance the ABC of geological hazard to everyone,and keep geological hazard in their mind so they can choose an appropriate way to decrease the losses before the hazard happen.The other is to strengthen the work of monitoring and prediction,detect the hazard deformation features,analyze its trend,and make it possible to take countermeasures to decrease the losses before geological hazard happens.
Geologic hazards
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AbstrcatThe Geographic Information System (GIS) technology has been widely applied in the study of hazard. GIS has a powerful advantage in spatial data analysis and management, which can provide powerful support in the geological hazard dynamic monitoring, mechanism simulating, forecast and management decision-making. Starting with the analysis of basic situation of the geological hazard in Shaanxi, the geologic hazard information system, based on GIS, is designed, and the objectives, overall design and functions of the system are analyzed. The system can provide scientific basis for geological disaster control and management and for economic loss reduction in Shaanxi province.
Geologic hazards
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Based on WEBGIS platform, the paper presents a real-time warning system for regional geological hazards in Zhejiang Province which is formulated with precipitation and its forecasting data and geological hazard investigation data. The system concludes four subsystems: subsystem of geological hazard management; subsystem of spatial prediction and time warning; subsystem of application in illustrative regions and subsystem of hazard reduction and prevention. The main purposes are (1) to establish systematic digital geological hazard management of individual and regional geological hazard information including data and maps according to the subsystem of geological hazard system, which can serves for decision-making in administrative ways; (2) to establish a real-time regional geological hazard warning system in Internet which is strongly connected with weather information center. The warning information of Zhejiang Province is released timely through Web net in raining seasons. The key part of this system is geological hazard prediction and warning modes, which is realized with the combination of regional geological hazard zonation and dynamic weather information. This system is run during the rain season from May to July of 2004. It is evaluated by in-site geological hazard inventory that practical geological hazards are mostly occurred within the warned high risk areas, which gives good confidences of the models and system operations.
Geologic hazards
Hazard map
Early warning system
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Effective disaster risk reduction (DRR) efforts depend on comprehensive risk assessments that consider potential hazard events and social vulnerability. The Lake Nyos Disaster (LND) caused the deaths of about 1,700 people, forced another 4,000 people from their homes, and left survivors more vulnerable to future hazards. There is considerable research on the gas hazard and some work on local vulnerability; however studies rarely consider both aspects of disaster risk (DR). This study addresses both the hazard and vulnerability and uses several qualitative and quantitative methods which have never been applied to LND survivor vulnerability or gas hazard. Interviews, participant observation, the Pressure and Release (PAR) and Access models are used to analyze vulnerability. A modified LAHARZ model and GIS mapping are used to categorize the gas hazard. By modeling various gas release scenarios and determining the main factors affecting vulnerability, DR for survivors in the Nyos area is calculated.
Vulnerability
Social vulnerability
Disaster risk reduction
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Starting with the analysis on the geological hazard in Shaanxi, the geologic hazard information system is designed based on GIS, and the objectives, overall design, functions of the system are analyzed. It can provide scientific basis for managing and controlling the geologic hazard in Shaanxi and reduce economic loss.
Geologic hazards
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Geological hazard is always a common geotechnical problem and the treatment for it has catch worldwide attention at the present time.This paper give us a detailed summary about the newest research advances in some fundamental theories and the daily work in United States Geological Survey.In addition,a field trip for a landslide also have been presented in this paper,and the efforts of this field work give us a chance to have significant improvement in understanding the geological survey method that the related America researcher usually take to work.A discussion on the state of geological hazard treatment in China and America also be available for comparison.Corresponding information in this paper can be used as a worthy source of reference for researcher who has take full of interest to geotechnical problem.
Geologic hazards
Geological survey
Field survey
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The geological hazard of small cities and towns have the natural factors and the mam-made factors.The authors analyzed types and causes to the geological hazard of small cities and towns.The countermeasures have also been discussed.
Geologic hazards
Natural hazard
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