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Keywords = Caffarella Valley

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22 pages, 30819 KB  
Article
Late Holocene Abrupt Changes in the Fluvial Dynamics of the Tiber Valley Catchment (Rome, Italy): An Impact of the 4.2 Event?
by Fabrizio Marra, Carlo Rosa and Fabio Florindo
Quaternary 2025, 8(4), 59; https://doi.org/10.3390/quat8040059 - 23 Oct 2025
Viewed by 1068
Abstract
In the present work, we investigate the post-glacial aggradation of three tributary valleys draining the left hydrographic basin of the Tiber River in central Rome: the Murcia, Caffarella, and Grottaperfetta valleys. We describe the Upper Pleistocene–Holocene stratigraphic record of the alluvial successions occurring [...] Read more.
In the present work, we investigate the post-glacial aggradation of three tributary valleys draining the left hydrographic basin of the Tiber River in central Rome: the Murcia, Caffarella, and Grottaperfetta valleys. We describe the Upper Pleistocene–Holocene stratigraphic record of the alluvial successions occurring in the Caffarella Valley through the core data collected in a dedicatedly performed 35 m deep borehole. We provide seven 14C age constraints to the sediment aggradation which allow us to make a comparison with the Grottaperfetta and Murcia valleys, for which we present previously unpublished borehole data, and with the Tiber River Valley investigated in the previous literature. In particular, we highlight the effects of a mid-Holocene (5200–3800 yr BP) erosional phase, partially overlapping with the global 4.2 ka cooling/drying event, and we discuss the possible occurrence of a sea level fluctuation linked with this paleoclimatic event which has not been detected so far by other sedimentary records. Finally, we provide evidence for the widespread occurrence of a 6th century BCE (2550–2450 yr BP) overflooding phase that was previously observed only in the eastern portion of the Tiber River Valley in central Rome, which we suggest may be originated by concurrent intensive deforestation activity in central Italy. Full article
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19 pages, 6430 KB  
Article
Groundwater–River Water Interaction in an Urban Setting (Rome, Italy) Using a Multi-Method Approach (Hydrogeological and Radon Analyses)
by Martina Mattia, Gianmarco Mondati, Roberto Mazza, Carlo Rosa, Cristina Di Salvo and Paola Tuccimei
Water 2025, 17(10), 1555; https://doi.org/10.3390/w17101555 - 21 May 2025
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Abstract
The interaction of the Almone River with groundwater in the Caffarella area (Rome, Italy) was investigated using a multi-method approach based on hydrogeological and radon analyses. Eleven measurement stations were established along the river at distances of approximately 270 m from one another. [...] Read more.
The interaction of the Almone River with groundwater in the Caffarella area (Rome, Italy) was investigated using a multi-method approach based on hydrogeological and radon analyses. Eleven measurement stations were established along the river at distances of approximately 270 m from one another. Stream discharge, water physicochemical properties, and radon levels were measured from June 2024 to March 2025. The contribution of two tributaries of the Almone was evaluated, but it was found to be negligible in terms of radon contribution. Except for an average increase of 40 L/s between stations 1A and 2A, the Almone’s discharge (corrected for the streams input) was constant (around 150 L/s) in June and slightly increasing from 6A to 11A in March due to heavier rainfalls. The increased discharge between stations 1A and 2A was interpreted as groundwater overflow from the volcanic aquifer into the alluvial body and in turn into the river due to a change in geometry and volume of the volcanic aquifer. In that part of the river, radon concentration increased only in March, due to the fast transition of the groundwater from a high to a lower radon emanation unit. Radon decreased along the valley due to atmospheric evasion, as confirmed by pH growth due to CO2 degassing. Full article
(This article belongs to the Special Issue Research on Hydrogeology and Hydrochemistry: Challenges and Prospects)
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