What is Landslide? A landslide is the movement of rock, debris or earth down a slope. They result from the failure of the materials which make up the hill slope and are driven by the force of gravity. Landslides are known also as landslips or slope failure. (Source: www.ga.gov.au) Natural causes: i) Gravity ii) Heavy and prolonged rainfall iii) Earthquake iv) Wave v) Volcanoes etc. Anthropogenic causes: i) Jhum cultivation ii) Deforestation iii) Unsustainable vegetation iv) Cutting and deep excavation for buildings, roads, cannel, drainage, etc 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. Mitigation Measures: Geometric methods Hydrogeological methods Chemical and mechanical methods **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 Conclusion: Landslide has become a common disaster in our country. It causes death of large number of people every year.

1. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
Group No.: 04 Pages: 01 of 21DM-5113
WELCOME TO OUR
PRESENTATION
Batch: 13

2. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Landslides in the hilly region of Bangladesh
and their mitigation measures.
DM-5113
A Presentation on:

3. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Class Roll Name
1306 Sirajul Islam
1326 Mohmmad Mamun Biswas
1329 Md. Samsuzzaman Khan Letu
1341 Md. Jahangir Alam
1342 Md. Arifur Rahman
1353 Shams Salehin Turas
1355 Md. Wazed Ali

4. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
Group No.: 04 Pages: 04 of 21DM-5113
What is Landslide?
Batch: 13
A landslide is the movement of
rock, debris or earth down a
slope. They result from the
failure of the materials which
make up the hill slope and are
driven by the force of gravity.
Landslides are known also as
landslips or slope failure.
(Source: www.ga.gov.au)

5. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Types of Landslides
Batch: 13

6. MS IN DISASTER MANAGEMENT
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Causes of Landslides
Batch: 13
A. Natural causes:
i) Gravity
ii) Heavy and prolonged rainfall
iii) Earthquake
iv) Wave
v) Volcanoes etc.
B. Anthropogenic causes:
i) Jhum cultivation
ii) Deforestation
iii) Unsustainable vegetation
iv) Cutting and deep excavation for buildings, roads, cannel, drainage, etc

7. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Deforestation in hilly area
Due to heavy rain
Figures and photos of some causes of Landslides
1 2 3
6
54
Water flow due to heavy rainfall

8. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Source: BUET-Japan Institute of Disaster Prevention and Urban Safety (BUET-JIDPUS) Bangladesh
University of Engineering and Technology (BUET)

9. MS IN DISASTER MANAGEMENT
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•Hill along the narrow northern strip
of Mymensingh.
•Hill Ranges of Northeastern Sylhet
•Chittagong & Chittagong hill tracts
Where does landslides occur mostly in Bangladesh

10. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Major landslides in Bangladesh

11. MS IN DISASTER MANAGEMENT
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Major landslides in Bangladesh

12. MS IN DISASTER MANAGEMENT
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Major landslides in Bangladesh
Date Location Consequence
28 July 2013 Lalkhan Bazar, Ctg. 2 People killed
19 July 2015 Bayezid and Lalkhan Bazar, Ctg 6 People killed
10-February 2017 Brahmanbarhia and Sylhet. 4 People killed
16 March 2017 Jaflong, Sylhet. 2 People Killed
Source: http://bangla.bdnews24.com/ and others online news papers

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Some Landslide Vulnerable Area of Chittagong City
Student of BUET, Civil Engineering Department
1 2
3

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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.

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Mitigation Measures
Landslide may be prevented by stabilization of slope. There are three
basic approaches:
 Geometric methods
 Hydrogeological methods
 Chemical and mechanical methods

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Example applications of mitigation measures.
Mitigation Measure: Fill Slopes and Soil Nailing
21

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Example applications of mitigation measures.
Horizontal Drain to Dewater

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Example applications of mitigation measures.
Mitigation Measures: Retaining Walls
21

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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

20. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
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Landslides are killer
This has to be stopped now.
Let us be aware.
Let us stand together.
Our response must start now!!!
Landslide has become a common disaster in our country. It
causes death of large number of people every year.

21. MS IN DISASTER MANAGEMENT
Department of Geography & Environment
Group No.: 04 Pages: 21 of 21DM-5113 Batch: 13
Landslide
1306
1355
1353
1342
1341
1329
1326