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For mountains and people
A community based flood early warning system (CBFEWS) is an integrated system of tools and plans managed by and for communities, providing real-time flood warnings to reduce flood risks.
For mountains and people
CBFEWS is based on people-centered, timely, simple and low-cost technology. It disseminates information to the vulnerable communities downstream through a network of communities and government bodies.
A properly designed and implemented system can save lives and reduce property loss by increasing the lead time to prepare and respond to flood on ground level. UNEP (2012) defines early warning as “the provision of timely and effective information, through identified institutions, that allows individuals exposed to hazard to take action to avoid or reduce their risk and prepare for effective response”.
Early warning is defined by UNISDR as “the set of capacities needed to generate and disseminate timely and meaningful warning information to enable individuals, communities and organizations threatened by hazards to take necessary preparedness measures and act appropriately in sufficient time to reduce possibility of harms or losses” (ISDR 2006).
Community based flood early warning system (CBFEWS) is an integrated system of tools and plans managed by and for communities, providing real-time flood warnings to reduce flood risks. CBFEWS is based on people-centered, timely, simple and low-cost technology. It disseminates information to the vulnerable communities downstream through a network of communities and government bodies. A properly designed and implemented system can save lives and reduce property loss by increasing the lead time to prepare and respond to flood on ground level.
The United Nations International Strategy for Disaster Reduction (UNISDR) Platform for the Promotion of Early Warning has identified four key elements for a complete and effective early warning system. Based on UNISDR’s four key elements, CBFEWS has also defined four key elements for its implementation. An isolated approach cannot make the CBFEWS successful. It is important to understand that these four elements are interrelated and failure in one element can result in failure of the entire system. The detail is given in the next sections.
All community members of the vulnerable groups and district government line agencies are involved in planning, implementing, monitoring, disseminating flood early warning information and taking the ownership of the system.
The manufacturing, repair and maintenance of the system is done at the local level. The initial cost of the complete set of the instrument is approximately USD 1000 (as of May 2015).
The upstream communities generate information and pass it on to downstream communities as the water level rises in the river.
Disseminating and communicating risk information to the concerned communities and authorities is the integral part of the CBFEWS. When flood signal is detected upstream, it needs to be disseminated instantly so that people can prepare and respond to it.
Early warning information comes from individuals or organizations that generate a risk message and send it to concerned authorities and vulnerable people.
Warning recipients are nodal persons downstream who are part of the communication network and who receives the warning message from different channels (e.g., directly from the source such as a caretaker or other concerned authorities) and instantly communicate it to the household level.
Warning message is the information sent from the source to the intended recipients in the form of text (e.g., SMS), verbal or sound (siren, telephone, megaphone, shout, etc.) and visual (colour, flag, sign). When flood occurs, the situation does not allow for lengthy conversations.
Communication channel is the network of people created for information dissemination. An efficient and reliable communication network is important for CBFEWS.
Partner for technical inputs as well as manufacturing the instruments.
News and features
Stay up to date on what’s happening with news, events and information
from around the HKH.
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You will find publications produced or related to this Initiative in our publications repository – the HimalDoc. These information materials covers journal articles, books, book chapters, research reports, working papers, brochures, information sheets, and publicity materials including posters and flyers.
The Indus Basin Initiative seeks to build resilience to climate change impacts by improving current understanding of climate change, cryosphere, and water resources, and strengthening networks for developing water and hazard management solutions.
SWaRMA is a joint project with the Government of Afghanistan supported by the Government of Australia and implemented through the ICIMOD in collaboration with the Commonwealth Scientific and Industrial Research Organization (CSIRO) and national organizations in Afghanistan.