east of Mianrodan. The northern heights of the city, which in terms of political divisions include Sarab Mimeh and Zarin Abad, are covered by a mountainous region with small and large valleys and sometimes small intermountain plains. This area is a part of the watershed of Mime River, which has been inhabited by different human groups during different periods (Paleolithic to modern times) due to favorable geographical conditions. The pattern or patterns of settlement and lifestyles of Parthian period human societies in the mountainous heights of Dehlran city based on statistical analyzes extracted from GIS software are among the basic issues and questions of this research.

As a result of the archaeological investigations of the study area, which covers an area of ​​1355 square kilometers, a total of 53 ancient sites with cultural finds from the Parthian period were identified, which in terms of the variety of identified sites include 47 The area has 2 cemeteries, 1 castle (?), 1 rock relief, 1 rock shelter and 1 crypt (underground architecture). The distribution of identified ancient places and their overlapping with basic maps in GIS software proved the effect of natural factors on the formation, development and decay of these places. In addition to environmental factors, communication routes also play an essential role in the distribution of settlements in this period. Finally, the analysis of the data obtained from the researches has led to the proof of a nomadic society with a livelihood based on animal husbandry and sometimes agriculture (in the inter-mountain plains with favorable environmental conditions) during the Parthian period and in This area is proven.

It seems that Zagros mountain villages do not have regular cultural characteristics and each of them has specific characteristics and cultures while being connected to each other. Archaeological excavations and investigations in these areas generally show the development and cultural development and chronology of the nomadic and village-dwelling society from prehistory until now.