Abstract: Environment and environmental systems have memories which become heritages common to severalcivilizations. The river and valley systems at Diyarbakır are such a heritage, which is now part of theUNESCO List of Natural and Cultural World Heritage. This heritage now depends today; first on ourdecisions and deeds, but also on the history of the system Dynamics which impacts the dynamics of theriver whatever we do to it. This history is recorded in the terraces stretching along the river flood plain,and in the relationships between the river and the substratum that it incises. In 2014 and 2015, we investigated two areas related to the recent evolution of the river: (i) theHevsel gardens, which correspond to river terraces stepping at the foot of the city walls (right bank) and ofthe University (left bank); (ii) alluvial deposits downstream the Diyarbakır gorges, where right-bank fromthe Karacadağ converge towards the Tigris. Our first results provide new insights in the recent evolutionof the Tigris valley and River. Enlightening the impact of long-term dynamics onto the present evolutionof the landforms and onto the river’s future, they directly address the management and preservation of theHevsel Gardens and Tigris River valley in the Diyarbakır area.