III. GEOTECHNICAL ENGINEERING

B. ON GOING PROJECTS
2. Microzonation Map of Delhi
Date of Start

August 2004
(i) Central Road Research Institute, New Delhi (R)
(ii) Department of Science and Technology (S)

 

Present Status and Progress
• Collection of information from all possible sources (including members of Microzonation group) pertaining to Geological, geomorphological, seismotectonic, geotechnical aspects etc.

• Transformation of collected information into Digital form and Transformation of each data layer into GIS Format.

• Integration of each generated thematic information layer for preparation of microzonation Map of Delhi.
 
Work carried out

CRRI has completed the following tasks which were incorporated with the inputs created by IMD and other organizations to prepare the first cut microzonation map of Delhi.

1. Preparation of geological map of Delhi – the map prepared based on the geological data, maps and other publications are not based on the actual survey. The inputs mainly considered from the published map of GSI.

2. Siesmotectonic map of Delhi- The map prepared is based completely on the published, undigitised seismotectonic atlas of India. This will be an important map as it will give the relationship between the seismotectonic setup and other factors, required for future seismic analysis of Delhi.

3. Geomorphological map of Delhi – This map was created using extensive scattered material pertaining to geomorphology of Delhi. This map indicates the most recent geomorphological setup.

4. Census map of Delhi – The map includes the population of Delhi district and block wise. The density of population in various part of Delhi gives us the comparative settlement of population which could be a very useful input while going for microzonation map of Delhi.

5. Rock configuration map of Delhi – The rock depth map prepared by GSI has been updated by adding more recent information. The rock depth map is one of the important input thematic layers for preparing the microzonation map of Delhi.

6. Water depth map of Delhi: The water depth map of Delhi mainly based on the data collected from the CWC was prepared. Apart from the type of material and its properties the depth of water level is a very important input for demarcating the areas favourable for liquefaction potential.

7. Subsurface geotechnical data of Delhi – For preparing a liquefaction potential map of Delhi apart from many other things we also require the geotechnical properties of soil. The data collected by CRRI has been put in a proper database and then given to IMD who has prepared the liquefaction map of Delhi using the data.