This paper reports firsts result of absorption tests for the evaluation of the permeability of tw... more This paper reports firsts result of absorption tests for the evaluation of the permeability of two constructed wetland plants built up by Acquedotto Pugliese (AQP) near Putignano (BA) for the treatment of local wastewater municipal treatment plant effluent. These fields were planted with phragmites australis hydrophytes and cover an area of approx. 2,000 m2. They have been designed with Kickuth Root Zone Method. Assessment of the operational parameters of the system – hydraulic conductivity (permeability) in particular is very useful to obtain good design criteria - is quite difficult for the presence of coarse grained gravels mixed with rhizomes, for the influence of evapotranspiration and because of the different conditions of phragmites during the year. To the aim of better understanding the hydraulic of the system a in situ tests program has been planned. First results, concerning in situ measurement of permeability in the plants by Guelph permeameter, are in good agreement with...
International Journal of River Basin Management, 2013
ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purp... more ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purposes. Traditionally, it is performed by decoupling the prediction of hydrograph(s) at some section(s) of the waterway(s) from the delineation of downstream flooded areas by using synthetic hydrologic models and hydraulic inundation models, respectively. In the case of the Apulian ephemeral streams (Southern Italy), the application of such an approach is prevented by the lack of monitored rainfall–runoff data and the discrepancy of some key underlying hypotheses. Thus, the suitability of integrated (hydrologic–hydraulic) full-2D models is investigated here by assuming the rainfall as the only external forcing term into each element of the bi-dimensional domain, where the shallow water equations are integrated. This permits the reproduction of runoff generation, propagation and, eventually, flooding at any point of the catchment. Several model runs under many combinations of hydrological losses and surface roughness parameters demonstrate that the full-2D approach realistically reproduce catchment hydraulic behaviour and predicted inundated areas of Apulian ephemeral streams, thus being of direct relevance for basin management purposes.
International Journal of River Basin Management, Mar 1, 2013
ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purp... more ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purposes. Traditionally, it is performed by decoupling the prediction of hydrograph(s) at some section(s) of the waterway(s) from the delineation of downstream flooded areas by using synthetic hydrologic models and hydraulic inundation models, respectively. In the case of the Apulian ephemeral streams (Southern Italy), the application of such an approach is prevented by the lack of monitored rainfall–runoff data and the discrepancy of some key underlying hypotheses. Thus, the suitability of integrated (hydrologic–hydraulic) full-2D models is investigated here by assuming the rainfall as the only external forcing term into each element of the bi-dimensional domain, where the shallow water equations are integrated. This permits the reproduction of runoff generation, propagation and, eventually, flooding at any point of the catchment. Several model runs under many combinations of hydrological losses and surface roughness parameters demonstrate that the full-2D approach realistically reproduce catchment hydraulic behaviour and predicted inundated areas of Apulian ephemeral streams, thus being of direct relevance for basin management purposes.
The large number of rupestrian settlement sited in Apulia region have had the possibility to born... more The large number of rupestrian settlement sited in Apulia region have had the possibility to born and to grow up also in order to the special geological and geomorphological habitat of the sites where are localised. Only in few area it is possible to have a rock that is at the same time compact, impermeable, ma easy to be dug and modelled in architectural forms Among the different Apulian sandstone only the Gravina Sandstone (Lower Pleistocene) has this sort of characters, so that the localization of large rupestrian settlement is strictly conditioned by the outcropping of this lithotype and by the geomorphological characters of the site. While some settlements appear to represent a sort of troglodytic metropolis, which extend for several kilometres and are articulated in a compact succession of overlapping levels (from 3 to 12) of numerous caves and cavities, other settlements resemble ‘villages’, made up of a limited number of caves located on the same sub-horizontal level, someti...
Simplification of heterogeneous soils by mean of dual porosity systems (based on different intera... more Simplification of heterogeneous soils by mean of dual porosity systems (based on different interacting regions) made possible the analysis of water infiltration mechanisms in unsaturated zone. Some dual-porosity/permeability models normally assume similar equations for both domains while others suppose different formulations for the two regions , using Poiseuille's equation, or cinematic wave theory or Richards formulation. Most of existing literature models (dual-porosity, dual-permeability and multi-region models) don't take account of shrinking-swelling dynamics of clayey soils that cause the closure of fractures and hold water flow. For this purpose, an " evolving " dual-porosity model has been pointed out, in which fractures behave like pipes subjected to progressive narrowing due to water content increase in the swelling matrix. In this paper the application of the model to loamy fractured soils and the corresponding results are provided.
Infinite slope is the simplest limit equilibrium method for slope stability analysis. It is a 2D ... more Infinite slope is the simplest limit equilibrium method for slope stability analysis. It is a 2D slope stability analysis like all limit equilibrium methods. Hutchinson and Bhandari (1985) improved this approach taking into account lateral shear effects using a landslide cross section of rectangular form. This paper introduces a new model built up using a more realistic elliptical landslide cross section. Safety factors based on this model are sometimes really different from those of classic infinite slope model. This proves that the 2D infinite slope stability method could be sometimes too conservative if the landslide cross section is not too large compared to landslide depth. A further interesting result is related to the involvement of boundary strength. Where cohesion is greater than zero and contrary to classic 2D analysis, there is a particular depth where the factor of safety has a minimum value. This can be considered a sort of " critical depth " , for channelized...
The identification and analysis based on quantitative evidences of large geomorphological anomali... more The identification and analysis based on quantitative evidences of large geomorphological anomalies is an important stage for the study of large landslides. Numerical geomorphic analyses represent an interesting approach to this kind of studies, allowing for a detailed and pretty accurate identification of hidden topographic anomalies that may be related to large landslides. Here a geomorphic numerical analyses of the Digital Terrain Model (DTM) is presented. The introduced approach is based on 2D discrete wavelet transform (Antoine et al., 2003; Bruun and Nilsen, 2003, Booth et al., 2009). The 2D wavelet decomposition of the DTM, and in particular the analysis of the detail coefficients of the wavelet transform can provide evidences of anomalies or singularities, i.e. discontinuities of the land surface. These discontinuities are not very evident from the DTM as it is, while 2D wavelet transform allows for grid-based analysis of DTM and for mapping the decomposition. In fact, the g...
Engineering Geology for Society and Territory - Volume 1, 2014
ABSTRACT The paper presents some considerations on the potential influence of climatic changes on... more ABSTRACT The paper presents some considerations on the potential influence of climatic changes on the effectiveness and the success of reclamation works made between the 19th and the 20th century in some areas of the west bound of Taranto (South Italy), characterized by large swamps for centuries. Historical documents underline the difficulty to make effective and successful reclamation works in the area of Taranto, as in other areas of the Mediterranean basin because swamps were continuously supplied by upward groundwater flow from the powerful deep karst aquifer. Success were obtained during Thirties thanks to improvement in technical knowledge and design technics, but these successes were obtained in a period characterized by rainfall decreasing. This paper aims at emphasizing that successes in reclamation works were obtained during a period of rainfall decreasing that affected Taranto area and all southern Italy between the 19th and the 20th century. Rainfall decreasing induced a lowering of groundwater table and a reduction of swamp supply, favoring the success of reclamation works.
This paper reports firsts result of absorption tests for the evaluation of the permeability of tw... more This paper reports firsts result of absorption tests for the evaluation of the permeability of two constructed wetland plants built up by Acquedotto Pugliese (AQP) near Putignano (BA) for the treatment of local wastewater municipal treatment plant effluent. These fields were planted with phragmites australis hydrophytes and cover an area of approx. 2,000 m2. They have been designed with Kickuth Root Zone Method. Assessment of the operational parameters of the system – hydraulic conductivity (permeability) in particular is very useful to obtain good design criteria - is quite difficult for the presence of coarse grained gravels mixed with rhizomes, for the influence of evapotranspiration and because of the different conditions of phragmites during the year. To the aim of better understanding the hydraulic of the system a in situ tests program has been planned. First results, concerning in situ measurement of permeability in the plants by Guelph permeameter, are in good agreement with...
International Journal of River Basin Management, 2013
ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purp... more ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purposes. Traditionally, it is performed by decoupling the prediction of hydrograph(s) at some section(s) of the waterway(s) from the delineation of downstream flooded areas by using synthetic hydrologic models and hydraulic inundation models, respectively. In the case of the Apulian ephemeral streams (Southern Italy), the application of such an approach is prevented by the lack of monitored rainfall–runoff data and the discrepancy of some key underlying hypotheses. Thus, the suitability of integrated (hydrologic–hydraulic) full-2D models is investigated here by assuming the rainfall as the only external forcing term into each element of the bi-dimensional domain, where the shallow water equations are integrated. This permits the reproduction of runoff generation, propagation and, eventually, flooding at any point of the catchment. Several model runs under many combinations of hydrological losses and surface roughness parameters demonstrate that the full-2D approach realistically reproduce catchment hydraulic behaviour and predicted inundated areas of Apulian ephemeral streams, thus being of direct relevance for basin management purposes.
International Journal of River Basin Management, Mar 1, 2013
ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purp... more ABSTRACT The simulation of flood events is essential for risk prevention and land regulation purposes. Traditionally, it is performed by decoupling the prediction of hydrograph(s) at some section(s) of the waterway(s) from the delineation of downstream flooded areas by using synthetic hydrologic models and hydraulic inundation models, respectively. In the case of the Apulian ephemeral streams (Southern Italy), the application of such an approach is prevented by the lack of monitored rainfall–runoff data and the discrepancy of some key underlying hypotheses. Thus, the suitability of integrated (hydrologic–hydraulic) full-2D models is investigated here by assuming the rainfall as the only external forcing term into each element of the bi-dimensional domain, where the shallow water equations are integrated. This permits the reproduction of runoff generation, propagation and, eventually, flooding at any point of the catchment. Several model runs under many combinations of hydrological losses and surface roughness parameters demonstrate that the full-2D approach realistically reproduce catchment hydraulic behaviour and predicted inundated areas of Apulian ephemeral streams, thus being of direct relevance for basin management purposes.
The large number of rupestrian settlement sited in Apulia region have had the possibility to born... more The large number of rupestrian settlement sited in Apulia region have had the possibility to born and to grow up also in order to the special geological and geomorphological habitat of the sites where are localised. Only in few area it is possible to have a rock that is at the same time compact, impermeable, ma easy to be dug and modelled in architectural forms Among the different Apulian sandstone only the Gravina Sandstone (Lower Pleistocene) has this sort of characters, so that the localization of large rupestrian settlement is strictly conditioned by the outcropping of this lithotype and by the geomorphological characters of the site. While some settlements appear to represent a sort of troglodytic metropolis, which extend for several kilometres and are articulated in a compact succession of overlapping levels (from 3 to 12) of numerous caves and cavities, other settlements resemble ‘villages’, made up of a limited number of caves located on the same sub-horizontal level, someti...
Simplification of heterogeneous soils by mean of dual porosity systems (based on different intera... more Simplification of heterogeneous soils by mean of dual porosity systems (based on different interacting regions) made possible the analysis of water infiltration mechanisms in unsaturated zone. Some dual-porosity/permeability models normally assume similar equations for both domains while others suppose different formulations for the two regions , using Poiseuille's equation, or cinematic wave theory or Richards formulation. Most of existing literature models (dual-porosity, dual-permeability and multi-region models) don't take account of shrinking-swelling dynamics of clayey soils that cause the closure of fractures and hold water flow. For this purpose, an " evolving " dual-porosity model has been pointed out, in which fractures behave like pipes subjected to progressive narrowing due to water content increase in the swelling matrix. In this paper the application of the model to loamy fractured soils and the corresponding results are provided.
Infinite slope is the simplest limit equilibrium method for slope stability analysis. It is a 2D ... more Infinite slope is the simplest limit equilibrium method for slope stability analysis. It is a 2D slope stability analysis like all limit equilibrium methods. Hutchinson and Bhandari (1985) improved this approach taking into account lateral shear effects using a landslide cross section of rectangular form. This paper introduces a new model built up using a more realistic elliptical landslide cross section. Safety factors based on this model are sometimes really different from those of classic infinite slope model. This proves that the 2D infinite slope stability method could be sometimes too conservative if the landslide cross section is not too large compared to landslide depth. A further interesting result is related to the involvement of boundary strength. Where cohesion is greater than zero and contrary to classic 2D analysis, there is a particular depth where the factor of safety has a minimum value. This can be considered a sort of " critical depth " , for channelized...
The identification and analysis based on quantitative evidences of large geomorphological anomali... more The identification and analysis based on quantitative evidences of large geomorphological anomalies is an important stage for the study of large landslides. Numerical geomorphic analyses represent an interesting approach to this kind of studies, allowing for a detailed and pretty accurate identification of hidden topographic anomalies that may be related to large landslides. Here a geomorphic numerical analyses of the Digital Terrain Model (DTM) is presented. The introduced approach is based on 2D discrete wavelet transform (Antoine et al., 2003; Bruun and Nilsen, 2003, Booth et al., 2009). The 2D wavelet decomposition of the DTM, and in particular the analysis of the detail coefficients of the wavelet transform can provide evidences of anomalies or singularities, i.e. discontinuities of the land surface. These discontinuities are not very evident from the DTM as it is, while 2D wavelet transform allows for grid-based analysis of DTM and for mapping the decomposition. In fact, the g...
Engineering Geology for Society and Territory - Volume 1, 2014
ABSTRACT The paper presents some considerations on the potential influence of climatic changes on... more ABSTRACT The paper presents some considerations on the potential influence of climatic changes on the effectiveness and the success of reclamation works made between the 19th and the 20th century in some areas of the west bound of Taranto (South Italy), characterized by large swamps for centuries. Historical documents underline the difficulty to make effective and successful reclamation works in the area of Taranto, as in other areas of the Mediterranean basin because swamps were continuously supplied by upward groundwater flow from the powerful deep karst aquifer. Success were obtained during Thirties thanks to improvement in technical knowledge and design technics, but these successes were obtained in a period characterized by rainfall decreasing. This paper aims at emphasizing that successes in reclamation works were obtained during a period of rainfall decreasing that affected Taranto area and all southern Italy between the 19th and the 20th century. Rainfall decreasing induced a lowering of groundwater table and a reduction of swamp supply, favoring the success of reclamation works.
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Papers by Vincenzo Simeone