A PRELIMINARY APPROACH TO FLOOD RISK MAPPING AND FLOOD FORECASTING SYSTEM FOR THE LDCs
نویسندگان
چکیده
The aim of the project is the development of an Early Warning system for flood events based on precipitation analysis and related to historical flooded area detection.The recently change of Humanitarian International Agencies in the way of approaching the emergency preparedness has lead UN (United Nations) system to create a tightened collaboration with different research centers, where ITHACA (Information Technology for Humanitarian Assistance, Cooperation and Action) is one of these, with the aim to find new suited technologies to support the interventions. It could be extremely useful mapping the risk scenarios and establishing a flood forecasting system in the so called LDCs (Less Developed Countries), where an extreme meteorological event usually involves crisis on the local socio-economic order, in terms of huge damages and a very large number of displaced and dead people.The methodology is based on the individuation of critical precipitation events in the last ten years on worldwide extent and the evaluation of related fields effects in terms of flooded areas; these will be extracted from satellite images using suitable classification procedures and analyzing geomorphological aspects to identify the potential floodable areas. Pluviometric thresholds, determined by different analysis (hydrological and statistical), executed on historical rainfall data, will be stored in a database structure where they will be compared with real-time rainfall values.This Early Warning System allows to monitor near real time rainfall values, creating an alert for critical values and producing a map with a flood scenario referred to the past event with similar rainfall field.
منابع مشابه
Mapping the flood-prone areas for developing a flood risk management system in the northeast of Iran
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