TITLE:
A Preliminary Study to Detect Urban Changes and Its Relationship to the Flash Floods Disaster in Jeddah City
AUTHORS:
Ranya Fadlalla Abdalla Elsheikh
KEYWORDS:
Change Detection, GIS, Flash Flood, Urban, Remote Sensing
JOURNAL NAME:
Journal of Geographic Information System,
Vol.9 No.1,
February
16,
2017
ABSTRACT: Jeddah is one of the most attractive cities in Saudi Arabia. The expansion of urban
area becomes essential due to rapid population and housing demand. Many
environmental and economic problems could be occurring in absence of correct spatial
planning. In 2009 and 2011, many of people were killed and suffered from the
flash flood disaster in Jeddah. The aim of this paper is to provide clear
indicator for the change detection in the urban cover from the period of 1984
to 2014 in Jeddah. Also it indicates Cleary the relation between the urban
expansion and flash flood hazards event. Change detection techniques was
applied for Remote Sensing data and integrated into GIS environment. Change
detection analysis shows that the urban areas increased from 170 to 390 km2.
Urban expansion increased dramatically toward north and east. While it
decreased towards south. Digital elevation model obtained from satellite image
was used to extract watershed and stream networks. Drainages path way were
blocked by residential area and contributed to flash flood occurrence. This
study can be useful for future planning and for sustainable environment.