The geomorphological analysis of historically urbanized areas is the best scientific way to understand how the extant geomorphological factors conditioned urbanization. It also provides a baseline to enable comparisons to be made with the modern environment. This paper considers four urbanized historical sites on the Adriatic coast (Italy) that owe their urban development to particular geomorphological and environmental conditions that were modified over the centuries from the Roman age to the present day. The focus here is on the evolution of the shoreline and associated geomorphic variables (streambeds and river mouths migration). These factors are fundamental for determining the development of a city, both as basic boundary elements – therefore including defence and protection – and also for the development of harbours.

Studying fluvial dynamics and environments, GIS-based analyses are of fundamental importance to evaluate the network geometry and possible anomalies, and can be particularly useful to estimate modifications in processes and erosion rates. The aim of this paper is to estimate short-term erosion rates attributable to fluvial processes in two sample catchment sub-basins of the Marecchia river valley, by conducting quantitative morphometric analyses in order to calculate various descriptive parameters of the hierarchisation of the river networks and the mean turbid transport of streams (Tu). Sediment yield transported by streams can in fact partially express the amount of erosional processes acting within the drainage basin. The study area includes two sub-basins of the Marecchia valley (Senatello river, 49 km² and Mazzocco river, 47 km²), chosen because of their similar extent and of the different location in the major catchment basin. Starting from geomorphological maps of the two river basins, the Tu parameter has been calculated and converted in short-term rate (average value 0.21 mm/year). Moreover, the comparison of these short-term mean data with the uplift rates calculated on a regional scale (0.41 ± 0.26 mm/year) in the Marecchia valley confirms that the northern Apennines may represent a non-steady state system.

This work proposes an integrated methodology to inventory and quantitatively assess the geosites located in a mountain context of northern Apennines. The geological and geomorphological heritage and the historical, cultural, and religious heritage produce a complex cultural landscape. Such a context is expressed sometimes through monumental examples and other times through hidden or invisible points of interest. In particular, the test area is located between the Emilia-Romagna and Toscana regions (high valley of Tiber, Senatello and Marecchia rivers), including part of three protected areas. The choice of these test sites has been addressed also considering that meaningful historical sites and cultural testimonies are widely present, in addition to the geological and geomorphological features. Amongst these sites, we have considered the Mt. Faggiola Castle ruins, where Dante was possibly hosted when exiled from Florence, the St. Francesco route from Rimini to La Verna, the Historical Park of the Gothic Line of Badia Tedalda and the background of one of the most iconic Leonardo da Vinci’s portraits, la Gioconda.

Rimini is located at the southernmost end of the Po Plain, in Emilia-Romagna region. The geomorphology of the site mainly depends on the actions of the Marecchia River, coupled with marine processes in Holocene times. By creating a geomorphological map of the area, we highlight the factors that influenced the historical evolution of the town, relating them to anthropic features, with acmes in natural changes probably matching periods of climate deterioration. Many clues suggest that the Marecchia river pattern changed frequently and drastically during the climate deterioration of the Early Middle Ages, when the river’s name changed from Ariminus to Maricula (‘little sea’). The river frequently aggraded and overflowed during the climate deterioration of the Little Ice Age and until the early twentieth century. The urban geomorphological map, implemented according to the official ISPRA cartography criteria, has enabled us to highlight valuable elements for reconstructing the evolution of the town, that are now almost completely hidden by urbanisation.