عنوان مقاله [English]
The assessment of geographic diversity in natural environments has developed in the earth sciences and is a process by which non-living elements are assessed using qualitative, quantitative or quantitative-qualitative methods.
This research is descriptive, analytical and quantitative. The border of salt lakes and Hoz Sultan was prepared using Alos-Plasar digital elevation model with spatial resolution of 12.5 meters and using ArcHydro plugin in ArcGis10.7 software. The geomorphological units in the studied area were divided into three main units: alluvial fan, playa, and sandy areas. Geomorphological forms in this area were extracted using satellite images and field studies and from the quantitative indicators of landscape metrics, including eight indicators, Patch Richness Density, Relative Patch Richness, Simpsons Evenness Index , Index Shannon Evenness, Shannons Diversity Index, Simpson’s Diversity Index, Modified Simpsons diversity Index , Simpsons Evenness Index Modified in Fragstats software was used to evaluate the value of geomorphological units as well as areas of the studied area.The results show that the geomorphological units of alluvial fans, salt flats, salt mud flats and sand dunes respectively have the highest value among the geomorphological landforms. One of the reasons for the very high value of this unit in the studied area is the number of alluvial fans, the distribution and extent of this geomorphological unit in the playa of Salt Lake and Hoze Sultan. Alluvial fans can be seen in almost all foothills of the studied area. The number of alluvial fans in the studied area is equal to 258 and covers an area of about 5242 〖Km〗^2, which is the largest area among the geomorphological units, both in terms of frequency and area. In addition, from the point of view of landscape metrics, the northwest region of Kashan and Abu Zidabad has the greatest variety of geomorphology. . Therefore, the region south of the Salt lake has a high potential for the development of programs related to tourism focused on geotourism and geomorphotourism.