Flood hazard maps were developed using remote sensing (RS) data for the historical event of the 1988 flood with data of elevation height, and geological and physiographic divisions. Flood damage depends on the hydraulic factors which include characteristics of the flood such as the depth of flooding, rate of the rise in water level, propagation of a flood wave, duration and frequency of floodin...

Flood risk assessment is an important tool for urban planning, land development, and hydrological analysis. The flood risks are very high in arid countries due to the nature of rainfall resulting from thunderstorms cover, which comprises mostly dry soil. Several methods have been used assess risk, depending on various factors that affect likelihood occurrence. However, selection these weight as...

Among the various factors that contribute to flood risk, heavy storms, inadequate storm drainage systems, and the concentration of population and assets have usually been considered to be fundamental factors affecting flood damage. Climate change is also a real threat, bringing heavier and more frequent storms. This study presents a methodology for comparatively evaluating the impact of the flo...

Risk insurance mechanisms have been proposed as proactive policy options to enhance the resilience of communities for coping with extreme events. Many risk insurance mechanisms require designation of ‘‘risk zones’’ to legalize governmental interventions. After a three-day workshop and ensuing interviews, ‘‘wicked’’ challenges were identified in the designation of risk zones: risk thresholds; la...

Flood monitoring technique using adjustable histogram equalization is proposed. The technique overcomes the limitations (overenhancement, artifacts, and unnatural look) of existing technique by adjusting the contrast of images. The proposed technique takes pre- and postimages and applies different processing steps for generating flood map without user interaction. The resultant flood maps can b...

The main role of map is confined to representation of various kind of decision schemas and appraisal results. But it almost does no good to the understanding and definition of problems. Concept map is a method supporting for knowledge construction and sharing. We can construct knowledge effectively by concept map, organize knowledge from different experts and users using concept entities and re...

This study focused on producing flash flood hazard susceptibility maps (FFHSM) using frequency ratio (FR) and statistical index (SI) models in the Xiqu Gully (XQG) of Beijing, China. First, a total of 85 flash flood hazard locations (n = 85) were surveyed in the field and plotted using geographic information system (GIS) software. Based on the flash flood hazard locations, a flood hazard invent...

The number and intensity of floods have increased worldwide due to climate change, causing more damage, deaths and economic impacts than any other natural disaster. Coping with this type of disaster requires up-to-date, complete and accurate information about the current state of environmental variables. To make a contribution in this context, this paper proposes a crowdsourcing-based approach ...