General Development And Design Of HAZ-china Arthquake Disaster Loss Estimation System

In the past three decades, China has made great achievements in fields ofearthquake damage prediction, earthquake emergency rescue, earthquake fieldwork, and post-earthquake rehabilitation. Earthquake damage prediction hasbeen carried out in more than30cities and large enterprises, andcorresponding information management and aid decision making systemshave been built. Relatively complete standard system of earthquake field workhas been constructed. An integrative national technical system network ofearthquake emergency command which covers mainland China has beenbasically constructed, which plays an active role in emergency rescue workduring the great Wenchuan and Yushu earthquakes. The system has alsoprovided important basis and powerful technical support on earthquakedamage mitigation planning and emergency command decision making for theState Council and governments at all levels.Yet there remain several problems in present domestic research work:1)There are various earthquake damage prevention and emergency commandsystems, and the repeated construction of these systems has caused resourcewaste and idleness, and difficulty on maintenance and updating.2) Thesoftware/hardware construction costs too much, which makes part of the usersunable to afford.3) The effects of result display and aid decision making ofpart of the information systems are not good, therefore, a lot of accomplishedsystems are left unused and their functions are laid aside and neglected.4)Most of the information systems are developed based on the C/S mode, whichleads to smaller scope of services.5) Most of the information systems arerestricted to development and function implementation of specific informationsystem of a certain city. The technology is not unified, and there is lack of auniform system platform. In fact, although the operation interfaces andmanagement forms of these technical systems are different, the basic data andassessment models are similar and interlinked, and should not be separatedartificially.Aim at the above problems, taking the actual demand of Chinaearthquake disaster mitigation into consideration, and fully absorb the newestachievements at home and abroad, this paper puts forward to build a unifiedHAZ-China (HAZards China) earthquake hazard loss estimation system basedon WebGIS platform. This system is set to integrate functions like earthquakedamage prediction, earthquake emergency command, earthquake field lossassessment, building safety appraisal, post-earthquake scientific investigation,and post-earthquake rehabilitation. The system would provide comprehensivepre-earthquake, co-earthquake and post-earthquake information services fordifferent users. This paper analyses and studies the key technical problems of the system relative comprehensively. The main work and achievements arelisted as follows:1. This paper analyses earthquake business requirements and systemrequirements, and proposes the idea of overall function and architecturedesign of the system. It also confirms the architecture, developmenttechnology, GIS platform, database software, and integration technology ofthe system.2. After fully absorbing the latest technology thought and method of'Code for Earthquake Disaster Evaluation and Its Information ManagementSystem(Opinion Soliciting Draft)'(GB/T19428-201X), this paper gives outthe overall function orientation and the task grading principle of the technicalservice system of earthquake damage prediction. It summarizes thenationwide and provincial or city range attenuation relationships of groundmotion, giving out different drawing ways and dynamic modification methodsof earthquake influence field, putting forward the functional design thought ofearthquake influence filed module. Finally, the paper takes the earthquakeinfluence field module as an example, particularly introduces the realizationflow of earthquake model modularization which is proposed by the system.The realization flow consists of model and formula unified standardization,calculation processing logic, interface design, etc. The paper also proposes thefunctional design thought of earthquake damage prediction module forbuildings, summarizing the survey ways, sample rates, vulnerability analyticalmethods, and result display ways of various buildings at differentclassification grades, and suggests the prior adoptive vulnerability analyticalmethods for single building and building groups. The paper preliminarilyintroduces the functional design thought of earthquake damage predictionmodule for lifeline engineering, putting forward the functional design thoughtof earthquake hazard loss estimation module for lifeline engineering andbuildings, combing39earthquake casualty assessment methods at home andabroad and suggests4prior adoptive ones, proposes the functional designthought of earthquake casualty assessment module. The paper alsopreliminarily introduces the functional design thought of earthquakegeological disaster assessment module, secondary disaster analytical module,and earthquake damage mitigation countermeasure suggestion module.3. This paper expounds the overall functional structure, business process,and data flow of the earthquake emergency information service system, anddescribes the modeling way in the system of UML by taking earthquakedamage assessment pattern design as an example. It defines various triggermodes of earthquake, and introduces the basic function and process design ofearthquake trigger module. It combs different types of function points ofprompt pre-assessment, and introduces the basic functional design of promptpre-assessment and dynamic tracking module. It combs various functionpoints of earthquake emergency aid decision making and classification of emergency information, and introduces the basic function and process designof earthquake emergency aid decision making module. It preliminarilyintroduces the basic function of earthquake disaster situation reporting module,direct loss assessment on earthquake field module, and building safetyappraisal on earthquake field module. It summarizes36types of earthquakeassessment models, dividing them into three broad heading as earthquakedamage assessment module, aid decision making module, and path analysismodule, and respectively describes the basic function of these broad heading.4. The paper preliminarily presents the basic functional design ofrehabilitation information service system, comprehensive informationmanagement system, information publication system, model managementsystem, user and privilege management system, etc., and respectively givesout the use case diagrams for program development.5. The paper proposes the construction thought of multi-precision andmulti-scale database: mainly based on collection of the existing dataachievements, assisted by new methods like remote sensing image extractionand population statistics data deduction, supplemented by field investigationdata of typical districts. According to different data usages and precisions, thesystem database is divided into three layers: detailed data, less detailed data,and general data. The paper respectively describes the data sources, datacontents, data classification, and data storage formats of each database layer.The paper also defines the unified data structure standard, rules the specialdata processing requirements, adopts XML format to standardized processvarious parameters and data of system, builds the scheme for databasestoraging, updating and maintenance.6. Design and integration of system including contents such as hardwaredeployment, software platform selection, database, framework development,computing process have been accomplished. The prototype design method of interface was given out. The interfaces of home page, earthquake influence field, earthquake damage prediction, etc. have been built through program development. The computing processes of earthquake influence field drawing for setearthquakes, earthquake damage prediction for buildings, earthquake damageprediction for lifeline engineering, economic loss assessment, and casualty assessment have been initially realized. And functions such as query and statistic of assessment results with various dimensionalities, and display of documents and thematic maps have already been realized.7. The preliminary assumption of HAZ-China earthquake lossestimation system based on Cloud Computing platform is firstly put forwardin this paper, and the overall framework and basic function were given out.The paper expounds the basic function of4service layers of CloudComputing platform. The4layers are Earthquake Software-as-a-Service,Earthquake Platform-as-a-Service, Earthquake Data-as-a-Service, andEarthquake Infrastructure-as-a-Service. The architecture of the system has already been established. Finally, the paper indicates that the recent primarytask is the implementation of Earthquake Software-as-a-Service function.