Abstract
Pottery as one of the major handcrafts of human societies plays an important role in rebuilding past culture and civilization. Classification, typology and chronology of pottery are of great importance in archaeological studies. The abundance and variety of pottery in situ has made it possible for the archaeologist to obtain the best cultural evidence for the recognition of ethnicities and communities. Pottery documentation and species identification is one of the technical principles in archaeological studies. One of the less well-known areas in the archaeology of Iran’s historical period, especially in the Sassanid period, is the present-day area of Isfahan Province in the Central Iranian Plateau. Introduction and study of Shirkouh Naein area previously carried out by Alamdar hajiAlian was selected for the research since it was evaluated in terms of statistical population and type of cultural materials of the Sassanian era from both architectural and cultural point of view. 
Keywords: Classification, Typology, Chronology, Sassanian Islamic Pottery, Epistemology, Shirkooh Naein.

Introduction
The research method is descriptive-comparative and the results have been analyzed based on comparative studies. In fact, this article focuses on documentary studies, especially and studying written documents and field studies. Also, using the results of archaeological field survey, the obtained pottery was classified, classified and finally compared with the key archaeological sites of this period, and their results were compared.
 
Describe the Area of Shirkooh Naein
Naein, in Isfahan province, is a town located in the desert margin. Pakooh region is one of the villages of Naein located in the northwest. The ancient site of Shirkooh is in the vicinity of Separo Village located 6 kilometers away from the west of it. Due to its strategic location, this region has always been suitable for human settlements. Among the evidence which represents a Sassanian settlement in Shirkooh, one can mention a fortress, a Čahārṭāq (four arches), and Soffeh (Terrace platform). Before briefly discussing the main topic of the article, each will be briefly mentioned.

Čahārṭāq (Four arches)
The Čahārṭāq of Shirkooh, located in the central part of Naein, can also be placed in this category. In 2002 (1381) the monument was listed as a national property of Iran with the registration No. 7222 and after that, it was restored by Shah-Hosseini. The Čahārṭāq of Shirkooh is a square-shaped structure with approximate dimensions of 10 meters. Its current height is 12/40 meters, dome height is 6/10, and the internal height is 6/59.

Shirkooh Fortress 
The position of this fortress is in such a way that on top of it the Čahārṭāq is visible and on the other hand, the fortress is pretty obvious from the center of Čahārṭāq. Thus, these two structures are not far from each other. The plan of the fortress is almost irregular and a steep slope makes it hard to reach. The materials used in the construction of the fortress are cobblestones for the walls, mud-brick in towers and plaster as the main mortar of the entire building. At the interior of the fortress there is a rectangular structure which its directions are north-east south-west and somehow overlooking the low level of the plain and the village. Due to unauthorized excavations inside the fortress, a piece of plasterwork was found; this piece is 16 cm long and 9.5 cm wide and its surface is engraved.

Terrace Platform of Shirkooh (Soffeh)
Terrace platform is located at 38 7.33 N, 52 59 24 E. It is constructed at the farthest end of the site which connects it to the mountain. The main construction material of this Soffeh consists of cobblestones of the river. Since this terrace platform is flat and elevated, from the top of it the fortress and Čahārṭāq are remarkably visible.

Classification and Typology of Shirkooh Naein Pottery Found
The Sassanian Islamic pottery of the Shirkooh area of Nain County is varied in form Data were obtained from three Čahārṭāq sections, Shirkooh fortress and Soffeh. A total of 760 pieces of pottery (Sassanian and Islamic) were collected in the study of Alamdar haji Alian. Then, during field re-examination by the authors, 80 pieces of pottery (Sassanian and Islamic) were collected from the surface of the site; The present study was classified 63 stratigraphic fragments, typology and finally chronology. From a comparative study of 63 pieces of pottery obtained from surface examination, the number of fragments is as follows: edge 52, body 3 and floor 8; From the above-mentioned pottery, 42 pieces from the Sassanid era and 21 pieces from the Islamic era were identified. The color of the pottery is one of the most prominent features of pottery considered in the classification of pottery. This color is divided into three main groups of brown, pea, and red in the Sassanian Shirkooh pottery.
In addition to the aforementioned cases, the classification of the studied pottery of Shirkooh Naein into its fragments has also been considered. Accordingly, the rim components can be classified into eight distinct groups. Based on the typology of the pottery, five types were identified: Bowls, jars, earthenware, dish and bottles that make up the largest number of bowls and jars in the earthenware collection.

Suggested Chronology of Sassanian Shirkooh Pottery
One common way to identify the presence or absence of communication between cultural communities in neighboring areas is to compare their cultural artifacts with each other. To relate these potteries to relative chronology, to match the samples to Sassanian sites excavated and to have chronologies and sites found from archaeological excavations in Iran: Hajiabad, Mellian, Abou Nasser Fars Palace, Yazdgerd Castle, Oltan Ghalasi Dasht Moghan, Torang Tapeh Gorgan, Defensive Wall, Bandan Darges, Siraf and ete, and out of Iran archaeological excavations of Tal Aboushrifa, Kish and Bergotiat in Iraq, Kusad United Arab Emirates. Accordingly, it was found that the type of pottery studied in Shirkouh was most similar to the set of pottery obtained from surface surveys of Farsan plain, Torang Tapeh excavations in northeast of Iran, Yazdgerd castle and Tall Abusharifah in northwestern Iraq. Given this, Shirkooh is one of the Sassanian sites in the Naein region that has pottery traditions of this period.

Conclusion
Specifications of Shirkooh pottery and their comparison with different Sassanid zones indicate the taste of Sassanian pottery in this region and similar shapes in different periodic zones Sasanian is recognizable. Therefore, Shirkooh pottery is a local and indigenous species that can be seen in other areas. In general, the Shirkooh region is culturally influenced by western evidence such as Yazdgerd castle area and central Iranian plateau, especially east of Isfahan province, Chaharmahal Bakhtiari province and Farsan plain. In fact, based on the typological studies and comparisons of pottery with other Sassanian and Islamic sites, it seems that the settlement is located in Sassanian and early Islamic periods. As we know, the pottery at the end of each period is usually early or even later in the period and does not disappear all at once, such as the area where the Sassanian pottery of the early Islamic Times There has also been a continuing trend and it is difficult to identify.

Abstract
Agriculture played a significant role in the economic prosperity and development during the Sassanid era. The Sassanid facilitated economic, social, and political growth by constructing water structures tailored to the environmental landscape of the region and establishing laws for water utilization. The presence of perennial rivers like the Dez and Karkheh in Khuzestan created conditions not only to supply the water needs of local settlements but also to address the shortage of drinking, industrial, and agricultural water in other areas distant from rivers that had fertile soil. This was achieved through the construction of structures such as weirs, canals, Qanats, and other water facilities. Specifically, the water supply for the city and agricultural lands of Gondishapur, located 15 kilometers from the Dez River, was accomplished through various water bodies; among these, river Qanats played a fundamental role in transferring reliable water from the Dez River to the city and its farmlands. Archaeological field studies conducted by the authors have led to the identification of new water structures, including weirs, Qanats, and related canals, which had previously been recognized only in part. A considerable portion of these structures is located on the eastern side of the Dez River, and some extend near Gondishapur, suggesting the hypothesis that river Qanats were the main source of water supply for this city-a notion traceable in historical writings. The primary question of this research is how the permanent water required by the city of Gondishapur was supplied, what role the river Qanats played, and what the physical relationship between the Qanats and the city was. The methodology of this research is historical-analytical, and the information gathering is based on field data and historical sources. Satellite imagery analysis indicates the prominent role of Qanats utilization in transferring water to Gondishapur from the Dez River during the Sassanid period, although some of the Dezful Qanats can be attributed to a later period, even the Safavid era.
Keywords: Aqueduct - Canal, Sater Structure, Dez River, Gondishapur, Dezful, Sasanian.

Introduction
Water, as a vital element, has played a central role in the development of civilizations. In Iran, a country with water limitations, this issue has gained double significance, and water engineering has been recognized as one of the most prominent aspects of Iranian technology and skill from ancient times to the present. The Qanats, one of the most astonishing achievements of water engineering in Iran, is regarded not only as a solution for managing scarce water resources but also as a valuable cultural symbol. These irrigation systems, some of which extend over a hundred kilometers, are renowned not only in Iran but also worldwide.
In this text, the author examines the engineering system and exploitation of underground waters in Dezful and its connection with the water supply of the city of Gondishapur and its surrounding lands. It is emphasized that a more accurate understanding of these systems can contribute to a better comprehension of the subsistence economy and economic development during the Sassanid and Islamic periods. Furthermore, analytical-comparative studies can demonstrate the level of creativity and the impact of these systems on the life of the city of Gondishapur.
The author has used descriptive-analytical methods and tools such as remote sensing, aerial and satellite imagery, maps, and digital elevation models to analyze the data. This research seeks to answer questions about the role of river Qanats in providing drinking, agricultural, and industrial water for the city of Gondishapur and how the technology and construction methods of these Qanats were.
The research hypotheses state that the water needed for the city of Gondishapur was supplied through the construction of weirs, Qanats chains, and open canals from the Dez River. Tangible evidence such as the Dezful weir, river Qanats, open canals, the siphon bridge of the Siyah-Mansur River, and the city’s piping with ceramic pipes are presented as examples of this technology.
This research not only assesses the historical and archaeological aspects of these systems but also pays attention to their importance in sustainable development and the preservation of cultural heritage. Ultimately, this study can serve as an important resource for researchers interested in the history and technology of water in Iran.

Discussion
The central question of the current research is how the perennial water supply needed by the city of Gondishapur was secured, what role the River Qanats played in this, and what the physical relationship between the Qanats and the city was like. The methodology of this research is historical-analytical, and the information gathering is based on field data and historical sources. Therefore, the forthcoming article examines and analyzes the engineering system and exploitation of underground waters in Dezful and how it relates to the water supply of the city of Gondishapur and its surrounding lands. It specifically seeks to answer the following questions: Based on historical and archaeological documents, how are the River Qanats evaluated in terms of providing drinking, agricultural, and industrial water for the city of Gondishapur? And what was the technology and construction method of the River Qanats of Dezful and their various components? Following these questions, the hypotheses of this research have been organized as follows: The water needed by the city of Gondishapur was supplied through the construction of weirs, Qanats chains, and open canals from the Dez River as a permanent water source. This action has been evidenced by the construction of the Dezful weir, river Qanats, open canals, the siphon bridge of the Siyah-Mansur River, and the city’s piping with ceramic pipes as tangible proofs of water transfer to the city of Gondishapur.

Conclusion
Field research and analysis of Corona aerial imagery have revealed numerous water structures in the northern, western, eastern, and southern areas surrounding Dezful. Among these, the Qanats located on the eastern bank of the Dez River hold particular significance due to their direct relevance to this study. For instance, no traces of Qanats are identifiable in the Yaqub-e Leyth region in the 1968 Corona images, yet two Qanats shafts were discovered during field investigations. A primary deficiency in the initial plan was the failure to identify the Qanats chains in the Benuarshami area. Following the discovery of ancient Qanats and canals, research began on their history, indicating that some Dezful Qanats, such as Qamish-e Momenun, might date back to the Safavid era. It appears that parts of these Qanats, ancient canals, and water structures supplying the city of Gondishapur were constructed at least in the latter half of the Sassanid period, or it cannot be said that all Dezful Qanats branches belong to a specific era.
It seems that in the first half of the Sassanid period, open earthen canals were responsible for supplying water to Gondishapur, and in the latter half, the introduction of new crops such as rice and sugarcane increased water demand, rendering the canals connected to the Dez River insufficient. This situation partly justifies the creation of Qanats. After the abandonment of the city in the 7th or 8th century AH, it is likely that the water supply structures of Gondishapur became ineffective. Consequently, the Qanats, whose water discharge was recorded until 1966 AD, transferred water to the western lands of Gondishapur or directed it downstream via the Siyah Mansur River.