基于AHP-GIS的张家口主城区火灾风险评估
Fire Risk Assessment of the Main Urban Area of Zhangjiakou Based on AHP-GIS
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摘要: 评估一个地区的火灾易发性有助于消防设施的规划和部署。为评价张家口主城区的火灾风险程度及分布情况, 应用层次分析法(AHP), 基于城区基本信息、火灾风险点和救援防护能力, 构建了火灾风险评价体系; 利用GIS空间分析法, 获取各权重要素的分级图层, 并利用图层叠置处理, 得到城区火灾风险等级图。结果表明: 研究区域内消防风险等级及消防救援能力在空间上存在差异, 西部内圈老城区整体火灾风险较高, 但消防救援力量也较为充足; 西部外圈非城市核心区整体火灾风险不及老城区, 但其火灾风险呈逐渐升高的趋势; 东部郊区整体风险较低, 但区域内存在化工厂等重点风险因素, 且消防救援能力较弱。Abstract: Evaluating the fire susceptibility of a region is instrumental in the planning and allocation of fire-fighting facilities. To appraise the fire risk level and its distribution in the main urban area of Zhangjiakou, it employed the Analytic Hierarchy Process (AHP) to establish a fire risk assessment framework. This framework was constructed based on urban basic information, fire risk hotspots, and rescue and protection capabilities. Utilizing the GIS spatial analysis techniques, graded layers of each weighted factor were acquired. Through layer overlay operations, a fire risk zoning map of the urban area was generated. The results show that spatial disparities exist in both fire risk levels and fire-fighting capabilities across the study area. The inner-circle old urban area in the western part exhibits a relatively high overall fire risk; however, it is also equipped with relatively ample fire-fighting resources. The outer-circle non-core urban area in the western region has an overall lower fire risk compared to the old urban area, yet its fire risk is on a gradual upward trend. The eastern suburban area generally has a low risk, but it harbors key risk elements such as chemical factories, and is characterized by relatively weak fire-fighting capabilities.