Debris Flow and Large-Scale Landslide Disaster Prevention Information Network

Scope of Large-Scale Collapse Impact and Disaster Types

The impact scope of a large-scale collapse area refers to the area where the collapse phenomenon may impact or cause disaster to slopes or protected residents after the collapse occurs. It generally includes the potential area and the influence area (Figure 1-3), where protected residents include personnel, buildings, bridges, and public facilities.

大規模崩塌影響範圍示意圖 — Figure 1-3 Schematic Diagram of the Scope of Large-Scale Collapse Impact

After a large-scale collapse occurs, the accumulation types in the impact area can be divided into three categories: gravity accumulation type, debris flow type, and landslide dam type. Examples of actual domestic cases are shown in Figures 1-5 to 1-7.

Gravity Accumulation Type

Its movement process is mainly affected by gravity, and the main disaster area is the toe accumulation zone

重力堆積型案例圖 — Figure 1-5 Gravity Accumulation Type Case (Disaster location: Tengzhi Forest Road, Liugui District, Kaohsiung City, 98)

Debris Flow Type

The collapsed soil body enters the river channel and continues to accumulate downstream as a debris flow, further increasing its disaster scope

土石流型案例圖 — Figure 1-6 Debris Flow Type Case (Disaster location: Xinkai Settlement, Liugui District, Kaohsiung City, 98)

Landslide Dam Type and Debris Flow Type

After the collapse occurs, the soil body blocks the river channel, forming a natural landslide dam. In addition to the dam accumulation area, the disaster scope also needs to consider the impact area after dam failure

堰塞湖型案例圖 — Figure 1-7 Landslide Dam Accumulation Case (Disaster location: Shiwen Settlement, Chunri Township, Pingtung County, 98)

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Debris Flow and Large-Scale Landslide Disaster Prevention Information Network

Disaster Potential

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Scope of Large-Scale Collapse Impact and Disaster Types

Scope of Large-Scale Collapse Impact and Disaster Types

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Debris Flow and Large-Scale Landslide Disaster Prevention Information Network

Disaster Potential

Disaster-Causing Types and Countermeasures

Scope of Large-Scale Collapse Impact and Disaster Types

Scope of Large-Scale Collapse Impact and Disaster Types

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