According to the Kerala government, one-sixth of the total population of Kerala had been directly affected by the floods and related incidents. The flood peak ratio depends on the impervious fraction and percent of basin sewered and these factors have been taken into account in an urban flood peak model. Barely three weeks after the devastating floods, Kerala is witnessing the strange phenomenon of water level in rivers that were in spate till the other day falling sharply. Kerala has seen the worst and devastating flood in it’s past 100 years. It may be a separate assignment, or one of the introductory sections of a report, dissertation Many trains from and through have been cancelled and diverted due to flood and landslides in Kerala. The aim of a literature review is to show particular reader that researcher have read, and have a good grasp of, the main published work concerning a particular topic or question in specific field. This work may be in any format, including online sources. All the 14 districts have been affected by the heavy rain, flood and land slide. The Indian government had declared it a Level 3 Calamity, or "calamity of a severe nature". It is the worst flood in Kerala after the great flood of 99 that took place in 1924. The fury of 1924 flood levels in most of the rivers was still fresh in the memory of people of Kerala, the year 1961 also witnessed heavy floods and rise in the water levels of reservoirs.