A metric-based assessment of flood risk and vulnerability of rural communities in the Lower Shire Valley, Malawi

Type Journal Article - Proc. IAHS
Title A metric-based assessment of flood risk and vulnerability of rural communities in the Lower Shire Valley, Malawi
Author(s)
Issue 370
Publication (Day/Month/Year) 2015
Page numbers 139-145
URL http://www.proc-iahs.net/370/139/2015/piahs-370-139-2015.pdf
Abstract
In response to the increasing frequency and economic damages of natural disasters globally, disaster
risk management has evolved to incorporate risk assessments that are multi-dimensional, integrated and metricbased.
This is to support knowledge-based decision making and hence sustainable risk reduction. In Malawi and
most of Sub-Saharan Africa (SSA), however, flood risk studies remain focussed on understanding causation,
impacts, perceptions and coping and adaptation measures. Using the IPCC Framework, this study has quantified
and profiled risk to flooding of rural, subsistent communities in the Lower Shire Valley, Malawi. Flood risk was
obtained by integrating hazard and vulnerability. Flood hazard was characterised in terms of flood depth and
inundation area obtained through hydraulic modelling in the valley with Lisflood-FP, while the vulnerability was
indexed through analysis of exposure, susceptibility and capacity that were linked to social, economic, environmental
and physical perspectives. Data on these were collected through structured interviews of the communities.
The implementation of the entire analysis within GIS enabled the visualisation of spatial variability in flood
risk in the valley. The results show predominantly medium levels in hazardousness, vulnerability and risk. The
vulnerability is dominated by a high to very high susceptibility. Economic and physical capacities tend to be predominantly
low but social capacity is significantly high, resulting in overall medium levels of capacity-induced
vulnerability. Exposure manifests as medium. The vulnerability and risk showed marginal spatial variability. The
paper concludes with recommendations on how these outcomes could inform policy interventions in the Valley.

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