Geological hazards evaluation of northern mountainous area in Jizhou District of Tianjin based on ArcGIS
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摘要: 为调查清楚天津市蓟州区北部山区地质灾害潜在风险,更好地保障人民生命财产安全,基于ArcGIS平台,选取相关评价因子,采用数学综合评判的半定量方法,对蓟州区北部山区进行了地质灾害综合评价研究。结果表明: 研究区主要以崩塌、滑坡、泥石流地质灾害为主; 中、高风险区面积约247.76 km2,占蓟州区总面积的25.59%,高风险区主要分布在研究区北部黄崖关以及常州村—黄花山等地势较高、人员较为密集的景区内; 地质灾害高风险区大多集中在地质灾害高易发区、地质灾害极高危险和高危险分布区,人类活动较为密集,是未来地质灾害监测预警的重点。研究结果可为国家和地方政府灾害防治、应急管理和决策指挥工作提供可靠的科学依据和资料。Abstract: In order to investigate the potential risks of geological disasters in the northern mountainous area in Jizhou District of Tianjin and better ensure the safety of people‘s lives and property, the authors in this paper selected relevant evaluation factors based on the ArcGIS platform to conduct a comprehensive evaluation of geological disasters in the northern mountainous area of Jizhou District, using semi quantitative method of mathematical comprehensive evaluation. The evaluation results indicate that the main geological hazards in the study area are collapses, landslides and mudslides. The area of high and medium risk areas is about 247.76 km2, accounting for 25.59% of the area of Jizhou District. The high risk areas are mainly distributed in scenic areas with high terrain and densely populated areas such as Huangyaguan and Changzhou Village-Huanghuashan in the northern part of the research area. The high risk areas of geological disasters are mostly concentrated in areas with high susceptibility to geological disasters, and extremely high risk and high risk geological disaster distribution areas. These areas have intensive human activities, making them the focus of future geological disaster monitoring and warning. The research results could provide reliable scientific basis and information for disaster prevention, emergency management, and decision-making and command work of national and local governments.
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Key words:
- geological hazards /
- susceptibility /
- danger /
- risk level /
- comprehensive evaluation
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