Considering characteristics of high river density, special underlying surface in plain river network region, and municipal drainage system function, river network drainage unit model is proposed, which is defined as a region surrounded by main river or embankment. Flood storage variety and control projects regulation of small rivers in each unit is simulated. With drainage catchment as an objec...

In risk analysis there is a spatial mismatch of hazard data that are commonly modelled on an explicit raster level and exposure data that are often only available for aggregated units, e.g. communities. Dasymetric mapping techniques that use ancillary information to disaggregate data within a spatial unit help to bridge this gap. This paper presents dasymetric maps showing the population densit...

1. introduction flood is one of natural hazard which ranks the most one just like earthquake and drought according to the report of the natural hazard program of the united nations. besides physical factors, and lack proper management will increase the flood potential. therefore, in order to prevent flood damage it seems to be necessary to provide essential requirements before physical expansio...

Abstract Digital Elevation Models (DEMs) play a critical role in hydrologic and hydraulic modeling. Flood inundation mapping is highly dependent on the accuracy of DEMs. Various vertical differences exist among open access DEMs as they use various observation satellites algorithms. The problem particularly acute small, flat coastal cities. Thus, it necessary to assess input flood simulation red...

Floods are among the most common natural hazards around world. Mapping and evaluating potential flood essential for risk management mitigation strategies, particularly in coastal areas. Several factors play significant roles flooding recognizing role of these flood-related may enhance disaster prediction strategies. This study focuses on using Shannon’s entropy model to predict seven causing fl...

Assessments of vulnerability to flooding can generate useful data for planners and policy makers. To the best authors knowledge, no flood-vulnerability study has combined geophysical modelling floods with socio-economic assessments at finer municipal or household scale. In addition, extent which actually feed into flood adaptation policies remains largely unknown. A new index, associated method...

A new method for flood detection change detection and thresholding (CDAT) was used with synthetic aperture radar (SAR) imagery to delineate the extent of flooding for the Chobe floodplain in the Caprivi region of Namibia. This region experiences annual seasonal flooding and has seen a recent renewal of severe flooding after a long dry period in the 1990s. Flooding in this area has caused loss o...

The 2021–2022 flood is one of the most serious events in Malaysian history, with approximately 70,000 victims evacuated daily, 54 killed and total losses up to MYR 6.1 billion. From this devastating event, we realized lack extreme precipitation inundation information, which a common problem tropical regions. Therefore, developed Rapid Extreme TRopicAl preCipitation mapping framEwork (RETRACE) b...