International Journal of Research ISSN NO:2236-6124 Earthquake Hazard Assessment for Dudhawa Dam of Chhattisgarh State (India) Ashish Kumar Parashar 1, Sohanlal Atmapoojya2 1Assistant Professor, Dept. of Civil Engineering, Institute of Technology,GGV (Central University) Bilaspur, India E-mail:
[email protected] 2Professor, Department of Civil Engineering, K.I.T.S. Ramtek, Maharashtra, India, Abstract Earthquakes are caused by the sudden release of strain that has accumulated over time and are the most vicious natural hazards in the world, which manifest themselves in the form of vibrations of the earth. Recent years have witnessed an augment in awareness about earthquake and their sources and mitigations. Seismic Hazard analysis is a method of quantifying the area in terms of topographical and seismological data. The completeness of the data should be checked before carrying out the hazard analysis. For the present study a detailed catalogue of historical and recent seismicity within 300 km radius has been referred and liner sources were identified in and around the dam site. Earthquake data was analyzed statistically and the seismicity parameters, ‘a’ and ‘b’ of the region around Dudhawa Dam site of Chhattisgarh, India, has been evaluated. The outcomes are presented in the form of PGA using both deterministic seismic hazard analysis and probabilistic seismic hazard analysis with the estimation of % probability, for the probability of exceedance as 0.005g,0.01g &0.02g for a life span of 100 years. Keywords: Seismic inputs, Seismic hazard, DSHA, Peak Ground Acceleration, PSHA, Return Period. 1. Introduction Earthquakes, through their devastating effects - due to ground motion, earth faulting, tectonic deformation, soil liquefaction, landslides - are grave problem as faced by the modern society.