According to the disaster profile of Sri Lanka by Disaster Management Centre, (2013) the most frequent disasters and the highest number of victims arise in relation to floods. Disaster management is categorised into four phases as mitigation, preparedness, response and recovery by the National Governors' Association in America to help to be prepare for and respond to disaster. The necessity for distribution in terms of food, water, shelter and sanitation come under disaster response and recovery phases. The study conducted by Esposito, Elefante, and Iervolino (2013) point out that the reliability of a road network is evaluated in order to handle the disaster situations. The main types of reliability are defined as connectivity, travel time and the alternative reliability approaches, together considered as capacity and accessibility concerns. The reliability of the road network used to supply necessities in a flood situation is assessed using Biyagama Divisional Secretariat. It has 49 Grama Niladhari Divisions of which 27 are situated in close proximity to Kelani River and are prone to flooding. Data relating to the recent flood occurred in May 2016 has been considered for the study.

Jayakody, H., & Samarasekera, N.A. (2017). A reliable road network to supply necessities in a flood situation: the case of Biyagama divisional secretariat, Sri Lanka [Extended Abstract]. In T.L. Gunaruwan (Ed.), Proceedings of 2nd International Conference on Research for Transport and Logistics Industry 2017 (pp. 25-29). Sri Lanka Society of Transport and Logistics. https://slstl.lk/r4tli-2017/