Open AccessPre‐flood inundation mapping for flood early warning
Author(s) -
Billa L.,
Mansor S.,
Mahmud A.R.
Publication year - 2011
Publication title -
journal of flood risk management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.049
H-Index - 36
ISSN - 1753-318X
DOI - 10.1111/j.1753-318x.2011.01115.x
Subject(s) - flood myth , environmental science , precipitation , drainage basin , 100 year flood , meteorology , hydrology (agriculture) , climatology , geography , cartography , geology , geotechnical engineering , archaeology
In this study the results of two rainfall‐run‐off simulations were used as input into a MIKE11 GIS and hydrological modelling process for flood inundation mapping based on the flood event (27 S eptember to 8 O ctober 2000) in M alaysia of the L angat R iver B asin area. Separate inundation maps were generated for the recorded observed rainfall and from a developed quantitative precipitation forecast ( QPF ), which was based on top of the cloud reflectance and brightness temperature ( T B ) derive from A dvanced V ery H igh R esolution R adiometer ( AVHRR ) and G eostationary M eteorological S atellite ( GMS ) satellite data sets. The QPF had rain rates between 3 and 12 mm/h for the 264 h rainfall duration. While the actual recorded rainfall for the same duration was used for the observed. The objective of the study was to compare the similarities of the flood inundation generated from the QPF run‐off with that generated from the rainfall‐run‐off of the actual flood event. The accuracies of the maps were verified using grid point locations of flooded areas taken during the event. The selected sampled point of the verification showed an accuracy of 70% of the QPF on the observed flood map. Sampled points measured flood extent, coverage and depth of flood in the basin area.