A new methodology for flood damage assessment in urban areas

Abstract

Urban flooding caused by extreme rainfall events is becoming considerably more frequent and more destructive. Thus, enhanced models to predict accurately flood magnitude and location are of paramount importance. These models can then be used for urban planning, flood forecasting, flood management (real-time control, raise of flood alerts (emergency services management, etc.) and, ultimately, to estimate flood damage assessment. This paper demonstrates the capability of the Automatic Overland Flow Delineation (AOFD) methodology developed by the authors for flood damage estimation in urban areas. Properties in risk of flood are identified based on a spatial analysis, using the locations of flood - prone areas (ponds) and the location of buildings. The results obtained in this study open new research directions to estimate flood damage with even more detail, and extend flood damage estimation beyond property level, i.e. considering also traffic disruption, health issues and alike.

Plavljenja urbanih površina usled jakih pljuskova postaje sve češće i opasnije. Zbog toga je neophodno raspolagati sa kvalitetnim modelom koji može predvideti intenzitet i lokaciju plavljenja. Takav model se može koristiti za urbanistička planiranja, predviđanje poplava i šteta usled poplava, kao i za upozorenja usled očekivanih poplava. U ovom radu se istražuje mogućnost primene metodologije za automatsku delineaciju površinskih tokova za procenu šteta u urbanim površinama. Objekti koji se plave se određuju na osnovu prostorne analize, koristeći rezultate analiza depresija na urbanim površinama. Dobijeni rezultati u ovom radu otvaraju nove oblasti za istraživanje: uticaj bolje prostorne rezolucije na proračuna šteta, i uticaj poplava na saobraćaj, zdravlje ljudi i slično.