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Late-Holocene alluvial events in the Central Apennines, Italy

机译：意大利中亚平宁山脉的晚全新世冲积事件

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摘要

A stratigraphic sequence was identified in the Gran Sasso Massif (Central Apennines, Italy), consisting of alluvial sediments and buried soils. The soils, dated by the radiocarbon method, enabled various alluvial phases that have occurred in the last 2500 years to be chronologically framed. These phases were then correlated with the frequency of the Tiber floods at Rome and with the progradation of its delta. The phases of soil burial by alluvial sediments coincide with the periods of intense flooding of the Tiber at Rome (between the second century bc and the second century AD, between the sixth and the ninth centuries AD, and between the fifteenth and the nineteenth centuries AD) and with periods of strong progradation of the river delta. On the basis of the chronological correlation between alluvial phases, glacial variations, and oscillations in the levels of Lakes Fucino and Trasimeno, it was then possible to establish that, corresponding to the alluvial phases, the hydrological balance of the lakes was positive and, in two of the three cases, the increased flood frequency coincided with the phases of advance of the only glacier located in the Apennines.
机译：在格兰萨索地块（意大利亚平宁山脉中部）确定了一个地层层序，由冲积沉积物和地下土壤组成。用放射性碳法测年的土壤使过去2500年中发生的各种冲积阶段得以按时间顺序排列。然后，这些阶段与罗马台伯河洪水的频率及其三角洲的增长相关。冲积沉积物掩埋土壤的阶段与罗马的台伯河泛滥时期（公元前2世纪至公元2世纪之间，公元6至9世纪之间以及公元15至19世纪之间）相符。 ），以及河三角洲的强盛时期。根据冲积期，冰川变化和福西诺湖和特拉西梅诺湖水位波动之间的时间相关性，可以确定与冲积期相对应的湖泊水文平衡为正值，并且在这三种情况中的两种情况下，洪水频率的增加与位于亚平宁山脉的唯一冰川的前进阶段相吻合。

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