C Aubrecht, K. Steinnocher, M. Köstl:
"Regional flood impact assessment based on local land use patterns and sample damage records";
Environmental Research Letters, Vol. 6, (2011), Issue 4; 7 S.

Increasing land consumption and land demand particularly in mountainous regions entail
further expansion of settlements to known hazard-prone areas. Potential impacts as well as
regionally defined levels of `acceptable risk´ are often not transparently communicated and
residual risks are not perceived by the public. Analysing past events and assessing regional
damage potentials can help planners on all levels to improve comprehensive and sustainable
risk management. In this letter, a geospatial and statistical approach to regional damage cost
assessment is presented, integrating information on actual conditions in terms of land use
disparities and recorded damage data from a documented severe flooding event. In a first step
building objects are categorized according to their function and use. Tabular company
information is linked to the building model via geocoded postal address data, enabling
classification of building types in terms of predominant uses. For the disaster impact assessment
the flood plain is delineated based on post-disaster aerial imagery and a digital terrain model
distinguishing areas of long and short term flooding. Finally, four regional damage cost
assessment scenarios on different levels of detail are calculated. The damage cost projection
relies on available sample building-level damage records, allowing rough damage averaging for
distinct building uses. Results confirm that consideration of local land use patterns is essential
for optimizing regional damage cost projections.

land use, building types, flooding, disaster management, impact assessment,

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