Characterizing the Recharge of Fractured Aquifers: A Case Study in a Flysch Rock Mass of the Northern Apennines (Italy)

Cervi, Federico; Corsini, Alessandro; Doveri, Marco; Mussi, Mario; Ronchetti, Francesco; Tazioli, Alberto

doi:10.1007/978-3-319-09054-2_113

Cited by 21 publications

(24 citation statements)

References 3 publications

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“…This value is in the range of those found in other fractured flysch slabs in the northern Apennines (Corsini et al 2009, Cervi et al 2014 and allows for the quite fast depletion of the aquifer (QTOT from 220 Ls -1 to about 28 Ls -1 in 6 months). If no recharge had been supplied to the system at the beginning of autumn, the aquifer would have been completely emptied within 11 months.…”

Section: Resultssupporting

confidence: 52%

Hydrogeological characterization of peculiar Apenninic springs

et al. 2014

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In the northern Apennines of Italy, springs are quite widespread over the slopes. Due to the outcropping of low-permeability geologic units, they are generally characterized by low-yield capacities and high discharge variability during the hydrologic year. In addition, low-flow periods (discharge lower than 1 Ls -1 ) reflect rainfall and snowmelt distribution and generally occur in summer seasons. These features strongly condition the management for water-supply purposes, making it particularly complex. The "Mulino delle Vene" springs (420 m a.s.l., Reggio Emilia Province, Italy) are one of the largest in the Apennines for mean annual discharge and dynamic storage and are considered as the main water resource in the area. They flow out from several joints and fractures at the bottom of an arenite rock mass outcrop in the vicinity of the Tresinaro River. To date, these springs have not yet been exploited, as the knowledge about the hydrogeological characteristics of the aquifer and their hydrological behaviour is not fully achieved. This study aims to describe the recharge processes and to define the hydrogeological boundaries of the aquifer. It is based on river and spring discharge monitoring and groundwater balance assessment carried out during the period 2012-2013. Results confirm the effectiveness of the approach, as it allowed the total aliquot of discharge of the springs to be assessed. Moreover, by comparing the observed discharge volume with the one calculated with the groundwater balance, the aquifer has been identified with the arenite slab (mean altitude of 580 m a.s.l.), extended about 5.5 km 2 and located 1 km west of the monitored springs.

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Section: Resultssupporting

confidence: 52%

Hydrogeological characterization of peculiar Apenninic springs

et al. 2014

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“…Doveri, M. et al utilized water isotopes as environmental tracers for the conceptual understanding of groundwater flow [6]. Cervi, F. et al studied 12 springs from the northern Apennines of Italy by means of a comprehensive hydrogeological investigation to unravel recharge processes taking place in a highly fractured slab of flysch rock hosting the corresponding aquifers [7]. At present, the development of a groundwater recharge model and a sensitivity analysis of groundwater to climate change are still in the research and exploration stages in China [8].…”

Section: Introductionmentioning

confidence: 99%

Climate Change and Its Influence on the Karst Groundwater Recharge in the Jinci Spring Region, Northern China

Jia

Zang

Zheng

et al. 2017

Water

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Due to climate change and human activities over the last fifty years, the spring flow volume of karst groundwater has sharply diminished in China. Climate change is one of the critical factors that initiates a series of karst hydrogeologic and water ecological environmental problems, because the precipitation shows a decreasing trend while the temperature shows an increasing trend. The Jinci Spring is one of the largest, most famous springs in northern China. This study employed data from the Taiyuan Meteorological Station and ten precipitation stations in and around the Jinci Spring region as well as the runoff data gathered from two hydrological monitoring stations during 1960-2012. The sliding average method and the Mann-Kendall test were used to analyze the variation tendency of precipitation, temperature, and land evaporation in this area. Finally, the following were calculated: the varying pattern of the karst groundwater recharge amount and the response of the recharge amount to precipitation, land evaporation, and river runoff by quantitative analysis. The results indicated that the precipitation and land evaporation amount decreased at first and then subsequently increased. Likewise, the variation trend of the karst groundwater recharge amount in the spring region was roughly consistent with the precipitation variation pattern. In contrast, the temperature displayed an increasing trend. The climate change resulted in a reduction of the karst groundwater recharge amount, and it had the greatest influence in the 1990s, which caused the karst groundwater recharge amount to decrease 26.75 mm as compared to that of the 1960s (about 39.68% lower than that of the 1960s). The Jinci Spring had zero flow during this period. The reduction in precipitation was one of main factors that caused the cutoff of the Jinci Spring.

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“…The numerical simulations demonstrated that the deformation was driven by stress reduction in the tuff plate. Moreover, the evolution of the phenomenon can be also related to the presence of a well-developed system of fractures within the rock mass , which can result in a higher secondary permeability (Cervi et al 2014). Due to the almost-impermeable clay-rich substratum, an aquifer can develop inside the rock mass and eventually play an important role in the stability of the slopes .…”

Section: Introductionmentioning

confidence: 99%

Back Analysis of the 2014 San Leo Landslide Using Combined Terrestrial Laser Scanning and 3D Distinct Element Modelling

et al. 2015

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Landslides of the lateral spreading type, involving brittle geological units overlying ductile terrains, are a common occurrence in the sandstone and limestone plateaux of the northern Apennines of Italy. The edges of these plateaux are often the location of rapid landslide phenomena, such as rock slides, rock falls and topples. In this paper we present a back-analysis of a recent landslide (February 2014), involving the north-eastern sector of the San Leo rock slab (northern Apennines, Emilia-Romagna Region) which is a representative example of this type of phenomena. The aquifer hosted in the fractured slab, due to its relatively higher secondary permeability in comparison to the lower clayey units leads to the development of perennial and ephemeral springs at the contact between the two units. The related piping erosion phenomena, together with slope processes in the clayshales have led to the progressive undermining of the slab, eventually predisposing large-scale landslides. Stability analyses were conducted coupling Terrestrial Laser Scanning (TLS) and Distinct Element Methods (DEMs). TLS point clouds were analyzed to determine the pre-and post-failure geometry, the extension of the detachment area and the joint network characteristics. The block dimensions in the landslide deposit were mapped and used to infer the spacing of the discontinuities for insertion into the numerical model. Threedimensional distinct element simulations were conducted, with and without undermining of the rock slab. The analyses allowed an assessment of the role of the undermining, together with the presence of an almost vertical joint set, striking sub-parallel to the cliff orientation, on the development of the slope instability processes. Based on the TLS and on the numerical simulation results, an interpretation of the landslide mechanism is proposed.

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Characterizing the Recharge of Fractured Aquifers: A Case Study in a Flysch Rock Mass of the Northern Apennines (Italy)

Cited by 21 publications

References 3 publications

Hydrogeological characterization of peculiar Apenninic springs

Hydrogeological characterization of peculiar Apenninic springs

Climate Change and Its Influence on the Karst Groundwater Recharge in the Jinci Spring Region, Northern China

Back Analysis of the 2014 San Leo Landslide Using Combined Terrestrial Laser Scanning and 3D Distinct Element Modelling

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