Book

Description

Tsunamis are difficult to categorize although they are triggered by undersea earthquakes and other geological events, they essentially become an oceanic process that is manifested as a coastal water-related hazard. Hydro meteorological hazards are of atmospheric, hydrological or oceanographic origin. Examples are tropical cyclones (also known as typhoons and hurricanes); floods, including flash floods; drought; heatwaves and cold spells; and coastal storm surges. Other than seismic Tsunami, many rivers erode their banks and bed as they flow, slowly breaking down pieces of sediment and transporting them as time goes on. This process wears away the beds and banks of rivers, and can even change the shape of a river over many years. Impacts of river bank erosion are multifarious: social, economic, health, education and sometimes political. The first and foremost impact is social, i.e., homelessness due to land erosion which compels people to migrate. Every year, riverbank erosion leads to millions of people being affected as it results in damage and loss of crops, cattle, housing structures, and farmland. Additionally, it erodes away public infrastructure and communication systems. This study conducted through document review to explore relevance between seismic tsunami and river erosion as non-seismic tsunami. The study looks up at the similarities of tsunami with river erosion in terms of nature, damage, loss and other impacts. The study also interpreted national data set “Bangladesh Disaster Related Statistic 2021” for understanding the extent of hazard of river erosion.