Cities in the water. Waterscape and evolution of urban civilisation in Southern Mesopotamia as seen from Tell Zurghul, Iraq

Ancient canals, marshes and proximity of the sea heavily characterised the landscape and environment of the ancient State of Lagash in southern Iraq, from the mid-fifth to the second millennium BC: indeed the diachronic changes that can be analysed thanks to geological and archaeological observation and investigation show how this waterscape definitely influenced the shapes of settlement and the organisation of ancient societies from a cultural, economic and biological point of view. Recent excavations at Tell Zurghul in southern Iraq are giving the possibility to test, in the field, the presence of water: ancient cuneiform sources, from the mid-third millennium BC, show the intense programme of the rulers of the State of Lagash in managing water through the construction of canals and the regulation of marshes characterised by marine water due to the proximity of the sea. In this respect, human actions (such as the digging of canals) and natural conditions (such as the reduction in the fifth millennium and the progressive growth in the fourth millennium BC of water level) are recognisable in the field, and they of course explain the morphology of the site in the past and the changes it suffered even in the present: water in fact is doubtless a fundamental resource for suitable conditions of formation and growth of a urban centre, but it also limits the possibility of extending occupation on the entire surface (as, e.g. the exploitation of lands for agricultural purposes).