Framework of Spatial Flood Risk Assessment for a Case Study in Quang Binh Province, Vietnam

• Vietnam has been extensively affected by floods, suffering heavy losses in human life andproperty. While the Vietnamese government has focused on structural measures of flood defence such   as   levees   and   early   warning   systems,   the   country   still   lacks   flood   risk   assessment methodologies  and  frameworks  at  local  and  national  levels.  In  response  to  this  gap,  this  study developed  a  flood  risk  assessment  framework  that  uses  historical  flood  mark  data  and  a  high- resolution  digital  elevation  model  to  create  an  inundation  map,  then  combined  this  map  with exposure and vulnerability data to develop a holistic flood risk assessment map. The case study is the October 2010 flood event in Quang Binh province, which caused 74 deaths, 210 injuries, 188,628 flooded properties, 9019 ha of submerged and damaged agricultural land, and widespread damages to canals, levees, and roads. The final flood risk map showed a total inundation area of 64348 ha, in which 8.3% area of low risk, 16.3% area of medium risk, 12.0% area of high risk, 37.1% area of very high risk, and 26.2% area of extremely high risk. The holistic flood risk assessment map of QuangBinh province is a valuable tool and source for flood preparedness activities at the local scale.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Geoteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Geotechnical Engineering (hsv//eng)

Keyword

flood risk assessment

flood risk management

flood risk map

historical flood mark

Soil Mechanics

Geoteknik

Publication and Content Type

ref (subject category)

art (subject category)