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Measures to Improve Landslide Management in Seoul in Response to Climate Change

Suk-Min LeeㆍHyung-Mi Yoon

Recently, the risk of landslides has increased due to climatic changes as a result of global warming, torrential rains, and extreme precipitation. The average annual temperature on the Korean Peninsula in the future is expected to rise by between 2 degrees and 4 degrees due to the global and regional climate models, and precipitation is expected to increase, predicting that landslides are likely to occur in the 2030s. According to the Korea Climate Change Evaluation Report 2020, extreme precipitation in the Seoul metropolitan area is expected to increase by 20% and the probability of landslides will increase by five times, so preparation is needed.

However, despite the increased risk of landslides, the scale of prevention projects by the landslide management department in Seoul is decreasing, and the administrative and technical access required for landslide management is insufficient. Therefore, it is necessary to improve safety inspection and design standards in consideration of climate change. Administrative measures and institutional bases should also be prepared accordingly.

This study proposes a plan to improve the Seoul landslide management in response to climate change by dividing it into structural and non-structural measures. Structural measures require inspection and maintenance of existing four-way facilities and continuous expansion of four-way facilities. In addition, the design standards for four-way facilities in preparation for extreme rainfall should be reviewed. In addition to safety, consideration of the environmental characteristics and landscape of four-way facilities is required. Further, drainage facilities in the border area where mountains and cities meet should be improved.

Non-structural measures should include the introduction and expansion of measurement systems in areas prone to landslides and the preparation of management procedures for development activities in mountainous and mountainous borders areas. In addition, imperative to form an amnesty management consultative body and establish governance for the management of other pardons distributed in schools, railways, and national parks among pardons in Seoul.