Landslide Inventory along newly Constructed Ghat road secetion at Vathalmalai Hills, Tamil Nadu, India

Abstract

The study aims to conduct landslide inventory and calculate the area and volume of landslide material from the geometrical measurements of landslides occurred at Vathalmalai hills, Dharmapuri district, Tamil Nadu, The study area located in a semi tropical region, India. Empirical relationship was derived between volume estimation and other parameters through the Person correlation coefficient model. Field data were collected through extensive field surveys and using the satellite data. The correlation between the area under landslide and volume of landslide material was studied using different curve estimation models. Various statistical parameters were calculated to relate the models with each other. Among various results, the power of law matches the records better. While, next to power law fit compound, growth and Exponential show high R2 value and low F statistic and less RMSE value. The correlation between area and volume of landslides determined V=0.492A1.224 for 10 landslide locations of the slide area in Vathalmalai. The landslide modeling shows that high R2 value in power law from 0.90, while it decreased as 0.83 in compound, growth and exponential. It significantly low in inverse model (0.48). According to the suggested relation, the mean of the average depth of landslides was assessed as 1.839 m which was near to mean of actual depth of 2.0 m.