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Special Issue 2008
PRESENTATION
Special Issue 2008
The research concerned the geo-environmental classification of the stream Fenestrelle-Rigatore, flowing down through the territory of Avellino (Campania). To reach our aim we referred to the Legislative Decree 152/99 (articles 4 and 5) and, in particular, to what referred in Annex 1. The study was divided into the following stages: 1) quantification of the water resources available in the Rigatore through the calculation of the annual medium water balance over the area of the catchment basin; on the basis o
Special Issue 2008
The aim of this study is to create an equalization and homogenization tank in an area adjacent to the depuration plant of Verziano (Brescia Province, Italy), using existing unconfined groundwater. This has caused problems in both planning and implementation of this project and has also affected costs. A flow model was elaborated by means of MODFLOW software in the steady-state mode, which considered the various interventions to be undertaken in order to lower the water table (bulkheads, wellpoints and drain
Special Issue 2008
An analysis of the interactions between surface and ground waters has been proposed for the upper basin of the River Marta (about 578 km2) in order to examine the problems related to the instream flow definition for some significant river sections. The River Marta, outlet of the Lake Bolsena, presents along its master course five hydroelectric power stations and the waste of some towns and little industries. The groundwater resources have been extracted from several wells. In addition, the basin is charact
Special Issue 2008
The carbonate aquifers provide the main drinking-water resources in Southern Italy. Several important towns, many smaller towns and countless villages utilize this water for their public water supply. Small springs are often utilized by bottling plants or thermal resorts. Nevertheless, groundwater is often contaminated by fecal bacteria because of the interaction between rocks having high permeability and microbial pollutants introduced in the environment by grazing and/or manure spreading. In order to prot
Special Issue 2008
This paper presents some experimental results from estimates of hydraulic conductivity in rock formations using empirical and semi empirical methods in the literature. Given that direct measurement of hydraulic conductivity in fractured rock formations is impossible at the surface and complicated and costly at depth, the study of some rock masses in Valtellina has provided us with the opportunity to apply empirical methods in investigating the hydraulic conductivity of rock formations. The study has show
Special Issue 2008
Several years of researches in the volcanic area of the Mount Etna consisting in the periodic verifications of the piezometric levels, the wells and springs yield and quality of water, clearly indicate the progressive quantitative and qualitative deterioration of the water resources of the volcanic aquifer. The absence of a rational management system of the water favoured that meaningful changed its quality. Forecasting the drinkable water demand increment described conditions draw a scenario of imminent
Special Issue 2008
Debris flows have been the object of research for many years and a number of assessment methodologies involving empirical methods or mathematical models have been developed to address the phenomenon. This study examines four debris flows on the southern slope of Cima Doscopà (Val Trela, Upper Valtellina, Italy) with the objective of assessing the predictive capacity of a number of methods in the literature. The study was divided into phases: measurements and sampling of the debris flows; laboratory tests
Special Issue 2008
The intense quarrying activities in the Carrara marble district (Apuan Alps, Italy) has led to the formation of widespread and thick quarry waste accumulations, which lie on steep slopes and invade many valley bottoms. In this area, rainstorms often cause floods, landslides, debris flows and deaths (e.g. on September 23, 2003). This research is aimed at determining the triggering conditions of the instability involving quarry waste. Firstly, the 23 September 2003 event was analysed in order to characterize
Special Issue 2008
The aim of this experimental study is to evaluate landslide susceptibility in a sample area of the Serchio River Basin by means of statistical approach and GIS techniques. The study area is characterized by high landslide susceptibility, because of the geological, geomorphological and climatic characteristics of the basin. This area is one of the rainiest in Italy and it is frequently hit by severe rainstorms, which often cause many landslides, involving villages, infrastructures and crops. This study is i
Special Issue 2008
The work examines the evolution of a lateral spread located in the southern coast of Sicily. The geological-structural framework of the area is represented by the Plio-Pleistocene Gela Nappe, the most advanced deformational front of the Apenninic-Maghrebian Chain in southern Sicily. The recent uplift of the area has increased the relief energy and the lithostructural conditions of the slopes where rigid rock overlie material with plastic behaviour, causing the activation of lateral spreading evolving from
Special Issue 2008
The paper describes the river dynamics and slope dynamics processes taking place in the section of the Andes in northwestern Argentina (Cordillera Oriental Unit), analyzing the causes in terms of agents, factors and conditions. The rising of this area of the chain is at the basis of the erosion and debris flow phenomena found there, which are favored both by climatic conditions (subarid, with little precipitation that is concentrated in infrequent but intense rains) and by the presence of clastic Qu
Special Issue 2008
The procedures most commonly used in the geotechnical practice to determine the LL are the Casagrande device and the cone penetrometer, other techniques being no longer in use or still being tested. The liquid limit value obtained by the application of the Casagrande device, compared to the cone penetrometer method, is strongly dependent on the experience, practice and manual skills of the operator, whereas the cone procedure is more rational and independent from the operator, and it is as simple and econ
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