Landslides in the hilly region of Bangladesh and their mitigation measures.

1.0  What is Landslide?

A landslide is the failure of rock, debris, soil, and the movement of grounds. 

A sample Photo of Landslides

2. The object of the study

• To understand landslides
• To find out the major causes of landslides in BD 
• To identify the area afflicted by landslides in BD 
• To Suggest the effective mitigation measures 

3. Types of Landslides 

Types of Landslides

4. Causes of Landslides in respect of Bangladesh's hilly area!

• a. Hill cutting for brick fields
• b. Hill cutting for road expansions
• c. Deforestation in hilly areas!
• d. Prolong rainfall 
• e. Water flow due to heavy rainfall  
• f. Hill cutting for residential areas etc.

Some Causes of Landslides: Sample photos

Some Causes of Landslides: Detail in Pie chart

  i) Gravity

  ii) Heavy and prolonged rainfall

 iii) Earthquake 

 iv) Wave

 v) Volcanoes etc. 

       i) Jhum cultivation

       ii) Deforestation

       iii) Unsustainable vegetation 

       iv) Soil cutting for roads, cannel, drainage, buildings etc. 

5. Where do landslides occur mostly in Bangladesh

Photo: Where do Landslides occur in Bangladesh

6. Major landslides in Bangladesh

Chart 01: Major Landslides in Bangladesh

Chart 02: Major Landslides in Bangladesh

7. Some Vulnerable Landslide Areas of Chittagong City 

Photos: Some vulnerable landslide areas of Chittagong City

8. Effect of Landslides

• Injury and death
• Property damage
• Water quality and quantity can be affected. 
• Transportation system can be damaged.
• The people will be refugee.  

9. Mitigation Measures or how to prevent Landslides 

Landslideapproaches may be prevented by stabilization of slope. There are three basic :

• Geometric methods
• Hydrogeological methods
• Chemical and mechanical methods

10. Example applications of mitigation measures:

Horizontal drain to dewatering

Mitigation measures of Landslides: Retaining wall

Mitigation measures for Landslides: Fill slop and soil nails

11. Some more points of mitigation measure

• Improving surface and subsurface drainage
•  Constructing piles 
•  Preserving vegetation
•  Rock fall protection
•  Stop hill cutting 
•  Tree plantation and vegetation 
•  Development of policy

12. Slogan to stop landslides in Bangladesh

Slogan to stop landslides in Bangladesh

Landslides are killer!
Let's be aware!!
This has to be stopped now!!!
Let's stand together!!!!
Our response must start now!!!!!

Thank You.