Mapping Flood Risk Assessment by Remote Sensing in District Chiniot, Pakistan

Abstract

A flood is a catastrophic event of natural origin which involves exposure of human population, infrastructure, and resources. Heavy rainfall in river catchments, snow melting in monsoon season, inadequate drainage networks, water overflowing from the main drainage channels, conversion of natural vegetation, agricultural land, and wetlands due to urbanization are the core reasons of floods. Whereas, climate change has made the condition worse and increases the frequency of the floods. Asia consists approximately one-fifth of the earth's land area with half of the world's population living in this continent. As natural disasters increased around the world, Asian countries also continued to experience hazard events especially from 1994 to 2004, when nearly 60,000 people were killed in floods (Arambepola, 2009).