Environmental Geology and Natural Hazards Assessment branch of the Geological Survey of Bangladesh is responsible for preparing scientific reports and maps relating to various environmental problems and natural disasters across the country. Environmental problems include manmade as well as natural like climate change issues. Natural hazards include natural as well as geo-hazards like earthquakes, landslides, floods, water logging, river bank erosion, etc. To identify the hazards and related environmental impacts mostly related to geological processes especially in urban and industrial areas of the country is the key priority work of this branch. Besides, this branch is engaged in deciphering different geological and geotechnical causes for hazards like tilting, collapse, subsidence or collapse of infrastructures of fast growing cities and gives advice to mass people and the government to mitigate or prevent or control natural hazards.
The objectives and responsibilities of this branch are, but are not limited to, the following:
1. To prepare Environmental geological and natural hazards maps of different cities, proposed growth centers and areas of especial intetrest and identify vulnerable areas to different types of natural disasters.
2. To survey the areas affected by different types of natural hazards like flood, landslide, riverbank erosion, etc and identify the geological and geotechnical causes.
3. To prepare earthquake and tsunami vulnerability map of different parts of Bangladesh.
4. To survey and identify the causes of damages and collapse of infrastructures like buildings, bridges, roads, embankments, etc due to geotechnical problems.
5. To provide proper support, suggestion and advice to the people and the government in geotechnical aspect for construction of infrastructures.
1. Engineering geological mapping and natural hazards assessment of Bandarban town and adjoining areas, Bangladesh.
2. A compilation work on identification and mapping of all faults/ lineaments and their relation of recent earthquakes of Bangladesh (scale 1:1,000,000). This work will help to locate active earthquake prone areas in the country.
3. Engineering geological and natural hazards assessment mapping of the floodplain areas of the Balu River in the eastern side of Dhaka district.
4. This branch in association with the Norwegian Geotechnical Institute (NGI) and is currently running a technical project titled- Enhance institutional support and capacity building of the Geological survey of Bangladesh for mitigation of geo-hazards in Bangladesh (2009-2012).
1. Earthquake Zoning Map and Tsunami Zoning Map of Bangladesh have been prepared which are comprehensibly used by different government and non-government organizations of the country.
2. Reports have been submitted on Environmental and Engineering Geological Mapping with emphasis on Natural Hazards Assessment of
-Dhaka city and its adjoining areas.
-Chittagong city and its adjoining areas.
-Rangamati town and its adjoining areas.
-Khulna city and its adjoining areas.
-Rajshahi city and its adjoining areas.
3. Report on the deadliest landslides of 11 June 2007 in and around Chittagong city corporation area, Chittagong, Bangladesh.
4. Report on the landslides of July 2008 in and around Teknaf upazila, Cox's Bazar, Bangladesh.
5. Report on May 2009 landslides in and around Lakhaichara and gully erosion of Uria Tila, Srimongal upazila, Maulvibazar district, Bangladesh.
6. In association with Comprehensive Disaster Management Programme (CDMP) of the Ministry of Food and Disaster Management this branch has successfully completed geomorphological, geological and geotechnical mapping of Dhaka, Chittagong and Sylhet city corporation areas for seismic microzonation of these cities.