URBAN SEISMIC RISK ASSESSMENT IN DEHRADUN CITY USING REMOTE SENSING AND GEOINFORMATIO

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URBAN SEISMIC RISK ASSESSMENT IN DEHRADUN CITY USING REMOTE SENSING AND GEOINFORMATION TECHNIQUES

Author: DEBARATI ROY | Size: 2.2 MB | Format: PDF | Quality: Unspecified | Publisher: Indian institute of Remote Sensing National Remote Sensing Agency Dept. of Space, Govt. Of India Dehradun, 248001, India | Year: 2007 | pages: 108

“Although the incidence of major natural disasters has not increased, their effects are becoming more severe in the Third World because of the growing numbers of people and structures located in hazard-prone areas. Millions people in these expanding urban populations are potential victims of disasters cataclysmic proportions, and even the political and economic stability of many nations in Africa, Asia and Latin America can be threatened.” – Spencer W Havlick Modern man, for all his intellectual development, his technological sophistication and even his technical abilities, is still at the mercy of natural forces. The scale and complexity of economic development makes man more and more dependent on the smooth functioning of very broad economic systems and technical facilities. Therefore, he may now not only be vulnerable to direct blows by natural disasters, but also indirectly vulnerable to catastrophes geographically distant areas. The city of Dehradun is the interim capital of Uttaranchal in North India and has short-listed by United Nations Development Programme (UNDP) as one of the most earthquake prone city in the country. Direct relationships between the damage of civil structures such as buildings to the number of casualties have been found. The frequent occurrence of damaging earthquakes clearly demonstrates the urgent need of study of earthquake risk assessment (ERA) methods of buildings to effectively reduce the impact of earthquake in the city. India, till date, no precise risk evaluation model of earthquake risk and damage assessment has been developed. Thus, in order to reduce risk, models developed by other countries have been adopted.
The secretariat of the International Decade for Natural Disasters
Reduction (IDNDR 1990-2000), United Nations, Geneva, therefore, launched the RADIUS (Risk Assessment tools for Diagnosis of Urban areas against Seismic disasters) initiative in 1996, with financial assistance from the Government Japan. It was aimed to promote worldwide activities for reduction of seismic disasters in urban areas, particularly in developing countries. The present study has been done with an aim to use RADIUS for analyzing the life and property damage in an urban area. In doing so, mitigation measures have been planned. This thesis work had been divided in three parts. The first part tries to assess the amount of urban densification that has occurred in the area, over a span of years. The second part deals with quantification of life and property damage the various magnitude of earthquake. The third part involves mitigation
measures that could be made in case of a crisis.

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