Geomorphological of hazard maps in ABAH Urban, KSA

Abstract

Abha Urban is located in Asir region, southwest of Saudi Arabia. Geomorphology is one of the most influential controls in urban planning, which gives an idea about the variations in landscape/landforms and indirectly facilitates in evaluating the resources of an area. for detailed study, multi-temporal satellite remote sensing imageries and ArcGIS were used to compile and create database that provided a visual and historical perspective of the urban expansion practiced in the study area since 1970 to 2018. the different thematic map such as land use change pattern analysis, topography, and geomorphology highlight the profound changes to the landscape/landform that have incrementally developed over time. Through studying geological structures, analyzing the height and slope of the surface -topography of the surface -and their impact on the urban expansion of the region, this research illustrates how geomorphological expert knowledge can be integrated in a GIS and RS for the evaluation of Geomorphological hazards. Geomophological hazard assessment is an important component of natural hazard risk assessment. This paper presents GIS-based geomorphological hazard mapping in Abha urban, this includes the integration of published geological, geomorphological, and other data into GIS, and generation of new map products, combining governmental concerns and legal restrictions. Detailed geomorphological hazard maps for flooding zones and earth movement potential, further the paper illustrates the application of vulnerability maps dealing with the effect of hazard on urban areas, these maps can help to initiate appropriate measures to mitigate the probable hazards in the area. And trying to propose appropriate solutions for urban expansion in the light of the Geomorphological hazard's studies.