Jung Il Seo

Significance and Future Direction for Designation and Management of Landslide-Prone Zones

Abstract The legal basis for the systematic prevention and response to landslide hazards, and the rehabilitation of landslide-hit areas, was established through the amendment of the Forest Protection Act in August 2012. The most noticeable amendment to the Act is the inclusion of clauses associated with the designation and management of landslide-prone zones (including debris flow-prone zones). In this paper, we (1) introduce the clauses related to the designation and management of landslide-prone zones that were included in the amended Forest Protection Act, (2) examine their significance by reviewing the present status of related domestic laws and structural countermeasures such as sediment check dams for sediment-related disaster prevention, and (3) suggest the future directions of the procedure for the designation and cancellation of such zones, and their maintenance and institutional aspects. The establishment of an institutional device for the designation and management of landslide-prone zones has great significance in the aspect of (1) the establishment of a comprehensive management and prevention system for potential landslide-prone zones in forested areas where the hazard risk has been poorly recognized as compared with the flood risks in lowlands, and (2) the establishment of the basis for overcoming the limits of structural countermeasures according to limited budgets. To develop the designation and management system for landslide-prone zones, not only must present problems be addressed, but a cooperation system between the administration and local residents must also be established.Key Words: Forest Protection Act, landslide-prone zones, designation and management, significance, future direction

The Effect of Side Screen Attached to Flat-board Debris-flow Breaker on Damage Reduction

이 논문에서는 바닥스크린의 토석류 피해저감 기능을 더욱 극대화하기 위하여 바닥스크린에 측면스크린을 부착하여 그 효과를 파악함으로써 측면스크린의 적정 순간격을 도출하고자 하였다. 그 결과, 바닥스크린에 측면스크린을 부착함으로써 작은 입경의 공급재료가 소량 측면스크린을 통과하였다. 그 대신에 바닥스크린의 상단면부에는 토석류의 선단부를 구성하던 큰 입경의...

A Study on the Safety Inspection of Erosion Control Facilities (I): In Case of Check Dams Located in the Gangwon Region

Recently check dam construction number have been increased by becoming known that effectiveness in the control of the landslide and debris flow. However, check dam management standards are not setting yet. Therefore, this study was carried by provide a basic data for the check dam management and inspection in the Gangwondo. The followings are the results of safety inspection on the 274 check dams, which are located in mountain streams, Gangwondo, Republic of Korea. 1. It was determined that, of 274 check dams inspected, 267 check dams (97.4%) generally had a safe condition but 7 check dams (2.6%) had a bad condition that repair and/or complementary measures are required. 2. The check dams with a bad condition had the ages greater than approximately 20 years. This result should be reflected to future stream management strategy including a timing of the specific inspection for durability of check dams. 3. Our finding suggests that the safety inspection of check dams is able to provide basic information required to maintain their own functions, and thus it should be widely applied to stream management strategy against to sediment-related disasters in the future.