How the choice of flood damage metrics influences urban flood risk assessment

How the choice of flood damage metrics influences urban flood risk assessment

Ten Veldhuis, J.A.E.

Civil Engineering and Geosciences

Water Management

2011-08-07

This study presents a first attempt to quantify tangible and intangible flood damage according to two different damage metrics: monetary values and number of people affected by flooding. Tangible damage includes material damage to buildings and infrastructure; intangible damage includes damages that are difficult to quantify exactly, such as stress and inconvenience. The data used are representative of lowland flooding incidents with return periods up to 10 years. The results show that monetarisation of damage prioritises damage to buildings in comparison with roads, cycle paths and footpaths. When, on the other hand, damage is expressed in terms of numbers of people affected by a flood, road flooding is the main contributor to total flood damage. The results also show that the cumulative damage of 10 years of successive flood events is almost equal to the damage of a singular event with a T = 125 years return period. Differentiation between urban functions and the use of different kinds of damage metrics to quantify flood risk provide the opportunity to weigh tangible and intangible damages from an economic and societal perspective.

flood damage assessment
flood risk
urban flooding

http://resolver.tudelft.nl/uuid:b9edd7f7-b06d-44c0-bc44-d7865ef95180

https://doi.org/10.1111/j.1753-318X.2011.01112.x

Wiley / Institution of Water and Environmental Management

1753-318X

Journal of Flood Risk Management, 4 (4), 2011

Institutional Repository

journal article

(c) 2011 Ten Veldhuis, J.A.E.