“Looking through the keyhole”: problems and research strategies for landscape archaeology in an alluvial plain with a high rate of vertical growth. The case of Bassa Romagna and south-eastern Po Valley

This paper aims to outline the main limits that a landscape archaeological project has to face examining a floodplain with a high rate of vertical growth of ground levels, due mainly to the combined action of subsidence and alluvial sedimentation phenomena. The investigated area is the Bassa Romagna, the south-eastern part of the Po Valley, object of survey since 2009. The paper focuses on the characteristics of the archaeological data collected, on the influence of the biases detected, and it presents some of the solutions applied in order to mitigate these limits.