Mass Movement

Question 1

Define Mass Movement

Answer 1

Mass movement refers to weathered, loose materials that (regolith) move down the slope under the influence of gravity

Question 2

Which factors influence mass movement

Answer 2

Human interaction
Deforestation
Water content
Gradient slopes
Heavy Rainfall

Question 3

What is soil creep

Answer 3

Soil creep occurs when soil moves down a slope at a slow and gentle speed of 1cm per year. This mean that it is the slowest form of Mass movement. We only notice these movements and affects after a few years of clues left on the landscape.

Question 4

What is a landslide

Answer 4

A landslide is a sudden movement of rock, soil, debris down a slope due to gravity that have been weakened by factors such as rainfall and deforestation and other human activities like road contraction and rails and buildings. These factors cause functions and support causing materials to slide downhill

Question 5

Types of Mass movements

Answer 5

Mudflow/ bog burst
Avalanches
Soil creep
Earthflow
Rockfall
Rockslide
Slump
Landslide

Question 6

Describe a case study you have studied in Mass movement

Answer 6

2018 Southern California landslide

City: Montecito city
Causes: Thomas forest fire 2017, Deforestation and Rainfall.
Date: January 9th 2018.
Triggered: Heaney rainfall leaving spoil unstable triggered a fast moving landslide destroying homes and roads.
Impacts: 23 people were killed. Massive property damage. Many people left injured.