Risk Assessment System of Spatial City Gas Pipeline

In order to improve the administrative level of pipeline safety among the surrounding environment, this paper proposes a pipeline risk assessment system of space and visualization based on the current situation of the gas pipeline risk assessment. The database of pipeline surrounding natural environment and social environment are established by using GIS. And the scatter grams on the accident severity and the vulnerability of hazard-affected bodies around the pipeline are obtained through spatial analysis and visualization technology. This paper also implements environmental comprehensive risk evaluation, judgment and visualization based on risk superposition principle. Combined with concrete examples, this paper finally introduces the implementation of the environmental risk assessment process under the impact of the risk evaluation system, obtains the spatial distribution results of visualization of environmental risk and provides decision makers with reliable decision basis. INTRODUCTION In recent years, many risk assessment methods for city gas pipeline has been proposed [1-2]. The traditional pipeline risk assessment can identify whether there is a risk, and can also evaluate the risk level or grade. But it cannot accurately inform users and decision-makers of the hazard-affected body or its spatial distribution or the level of risk. With the rapid increase in gas pipelines and urban construction, such evaluation methods cannot meet the needs of relevant personnel to pipeline safety and urban safety management. Therefore, introduce the pipeline GIS information technology, and take advantages of its powerful spatial data management, query and analysis capabilities to store and analyze the pipeline and its surrounding environment. It can also obtain the thematic maps which include the pipeline risk analysis and evaluation,pipeline risk distribution and the level of risk. This greatly promotes the development and application of pipeline risk assessment. On this basis, the risks of various surrounding hazard-affected body which caused by pipeline can be further analyzed