By bottom up approach i mean starting the preparedness activity from the root level by consulting with the most vulnerable groups, the drawbacks they face from existing management.
Dear Mirza, I think that "bottom up approaches" fit better for disaster risk reduction, while "disaster management" often is seen as a top-down effort. I do not, however, want to rule out, that even in "disaster management" such emancipating approaches also would make sense. Will have a look and report to you then my findings.
I and my colleagues have been publishing extensively on bottom-up disaster management, disaster risk reduction, and disaster risk management. Some examples which should lead to further citations:
1. Emergency management https://books.google.co.uk/books?id=2BYwDwAAQBAJ and https://books.google.co.uk/books?id=p9sxDwAAQBAJ
2. A specific community applying bottom-up principles https://ajem.infoservices.com.au/downloads/AJEM-22-01-04 and results http://www.ilankelman.org/articles1/kelman2008udp.pdf
3. Using local/indigenous knowledge http://www.tandfonline.com/doi/abs/10.1016/j.envhaz.2006.11.001 and https://onlinelibrary.wiley.com/doi/10.1111/j.1467-7717.2009.01126.x
4. A book for practitioners https://www.routledge.com/Disaster-Management-International-Lessons-in-Risk-Reduction-Response/Lopez-Carresi-Fordham-Wisner-Kelman-Gaillard/p/book/9780415717441
5. Integrating climate change https://www.routledge.com/The-Routledge-Handbook-of-Disaster-Risk-Reduction-Including-Climate-Change/Kelman-Mercer-Gaillard/p/book/9781138924567 and http://emeraldinsight.com/doi/full/10.1108/DPM-02-2017-0043
6. Community-based voices and actions for islands https://www.tandfonline.com/doi/abs/10.1080/13549839.2010.498812?journalCode=cloe20 and https://www.islandstudies.ca/sites/islandstudies.ca/files/ISJ-6-1-2011-Kelman-et-al_0.pdf
The key in all of these publications and approaches is combining top-down and bottom-up techniques to work together, rather than relying on only a single direction. We can all learn, teach, and exchange.
the Japanese, in many ways pioneers in disaster risk management, have an interesting concept called "Bosai". To my understanding it focuses on a resilient society built from the bottom up. Much of the philosophy aims at increasing the self-reliance of communities during the initial phase of a disaster, where response forces are stretched and assistance may only come days after en event. See for example here: https://www.bosai-jp.org/en