Topographic factors

The newly selected site should first choose a gentle flat land at a certain height above the perennial flood level. Try to avoid steep slopes cut by rivers, lakes (reservoirs) and ditches as much as possible. However, in mountainous areas, when the new site has to be located near a mountain or along a river, you should check the terrain of the back mountain and leave as much safe space as possible.

When the back mountain slope has an armchair-shaped terrain, it is usually an area where ancient landslides are distributed. You should further check whether there are landslide scarps, cracks and other phenomena for confirmation. The armchair-shaped terrain also easily collects surface water flow caused by rainfall, causing the surface soil on the slope to creep and form shallow landslides. When the back mountain has steep cliffs and steep slopes, attention should be paid to possible mountain collapse.

When a raised terrain similar to a "big belly" is formed, landslide stability is poor.

Rural areas in geological disaster risk areas in Kangding, Sichuan were relocated to safe areas (2006)

When the new site is located beside a ditch, it should be set on a slope of a certain height. When located on the shore, attention should be paid to the water level to avoid disasters such as floods hollowing out slopes and causing landslides. Avoid being located directly at the mouth of a ravine to prevent debris flow disasters. In areas where conditions permit, a safe distance of 5 to 10 meters should be maintained between the new site and the shore; if there is no condition to set a safe distance, attention should be paid to check whether the shore is stable, appropriate protection of the bank slope, and reinforcement of building foundations and foundations .

New villages are under construction to avoid relocation due to geological disasters (Kangding, Sichuan, 2005)

New houses are built on stable bedrock slopes (Wulong, Chongqing, 2006)

The new resettlement site is located on the steps of an ancient landslide. The drop in the reservoir water level triggered the landslide, endangering the village (Lubuge Hydropower Station Guizhou Reservoir Area, 2001)

The river washed away the foot of the steep slope and was built on the bank. The houses are very dangerous

Landslides were triggered by rainfall and houses built on the shore were destroyed

The newly selected site should avoid cuts by rivers, lakes (reservoirs) and ditches as much as possible of steep slopes