One-dimensional ground response analysis near Yamuna riverbank, Noida, India

Abstract

The present study reports the 1-D ground response analysis (GRA) results for various locations near Yamuna River, Noida, India. Yamuna river forms a major sub-basin of the Ganga River system that covers 42.5% of the total catchment area of the Ganga basin. Yamuna is the main river system of Delhi region and primary perennial source of water. Yamuna river experiences frequent flooding in the monsoon due to heavy rain and increased water level. It has been noted that the water table in all the locations is significantly high, which enhances the chance of the liquefaction of the sandy strata or cyclic mobility of the soft clayey strata. The sands obtained from the Yamuna bank fall into the boundary of the most liquefiable zone, hence earthquake studies are essential in the riverbank of Yamuna. In the present study, an attempt has been made to carry out one-dimensional ground response analysis by equivalent linear method using open-source software DEEPSOIL, for six borehole locations near the Yamuna riverbank considering 1991 Uttarkashi earthquake (M_w=7.01) as an input ground motion. Shear wave velocity is an essential input for carrying ground response analysis. Shear wave velocity is correlated from the SPT ‘N’ values using empirical relations. The peak ground acceleration value, Amplification Ratio, and response spectrum were determined for all the six locations.