http://dx.doi.org/10.1016/j.envint.2012.10.006">
 

Document Type

Journal Article

Department/Unit

Department of Biology

Title

Predicting the microbial exposure risks in urban floods using GIS, building simulation, and microbial models

Language

English

Abstract

London is expected to experience more frequent periods of intense rainfall and tidal surges, leading to an increase in the risk of flooding. Damp and flooded dwellings can support microbial growth, including mould, bacteria, and protozoa, as well as persistence of flood-borne microorganisms. The amount of time flooded dwellings remain damp will depend on the duration and height of the flood, the contents of the flood water, the drying conditions, and the building construction, leading to particular properties and property types being prone to lingering damp and human pathogen growth or persistence. The impact of flooding on buildings can be simulated using Heat Air and Moisture (HAM) models of varying complexity in order to understand how water can be absorbed and dry out of the building structure. This paper describes the simulation of the drying of building archetypes representative of the English building stock using the EnergyPlus based tool 'UCL-HAMT' in order to determine the drying rates of different abandoned structures flooded to different heights and during different seasons. The results are mapped out using GIS in order to estimate the spatial risk across London in terms of comparative flood vulnerability, as well as for specific flood events. Areas of South and East London were found to be particularly vulnerable to long-term microbial exposure following major flood events. © 2012 Elsevier Ltd.

Keywords

Building simulation, Flood, GIS, Hygrothermal, Mould, Urban

Publication Date

2013

Source Publication Title

Environment International

Volume

51

Start Page

182

End Page

195

Publisher

Elsevier

ISSN (print)

01604120

ISSN (electronic)

18736750

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