1,721,080 research outputs found
Apulian groundwater (Southern Italy) salt pollution monitoring network
No full textThe hydrogeological Apulian units are of coastal type and are mainly carbonate rocks of Mesozoic age. The rapid socio-economic growth, which has occurred in the past decades, has lead to different hazardous conditions in connection with groundwater quality. Groundwater for domestic, irrigation and industrial uses has been withdrawn in large quantities over the years; the aquifers are also increasingly becoming the ultimate "receptacle" for domestic and industrial wastewater. In order to characterise the evolutionary features of increasing saline and human-related pollution, data was gathered by a regionally based continuously operating hydrogeological monitoring network. It uses more than 100 wells, some of which are hundreds of meters deep, equipped with multiparameter sensors, temperature, conductivity and level gauges set up along the vertical axis and connected to a geo-information system. Water samples are periodically taken from the wells, the samples are analysed by chemical, physical and bacteriological parameters with the aim of detecting any farming and industrial pollutants. The new system, which provides real-time information for groundwater planning, scheduling and management, is described together with some preliminary results. The impact of seawater intrusion on water quality at regional level is also discussed.Published197-204N/A or not JCRope
Carbonate aquifers in Apulia and seawater intrusion
No full textThe predisposing factors and the determining factors of seawater intrusion in wide carbonate aquifers of Apulia ( Southern Italy) are characterized. Main predisposing factors prove the sedimentation environment, the tectonic-karstic evolution, the geometry of the aquifers in relation to the coastline, the depth of the aquifers, the existence of underground outflows and their chemical nature. The effect of salinity pollution and its trend was characterized using data from a regional monitoring network, considering logs time series, and also from well loggings. The intensive and widespread use has led to a progressive deterioration in water quality, particularly in the Salento area, right where the aquifer is most susceptible to seawater intrusion.Published219-231N/A or not JCRope
L'inquinamento e il sovrasfruttamento delle risorse idriche sotterranee pugliesi
No full textResearch carried out in recent years by CERIST operating unit has investigate Apulian hydrogeological unit groundwater. Different technologies have been applied by researchers, such as: multiparameter hydrogeochemical studies of the evolution of groundwater chemism; thermal infrared survey of coasts where springs were found; studies of varied space distribution of piezometric heads, salinity and water temperature; studies of hydrogeological relationships existing between various underground and sometimes very deep "mains d'eau" studies of protection methods of groundwater against saline pollution.
Recently, research has also focused on human-related pollution of Apulian aquifers. This subject has aroused great topical interest following the continuous and senseless use-of the subsoil for waste water collection. Authors particularly refer to the health, environmental and economic emergency that hit our Region in 1994. The effects of human activity on groundwater pollution and depletion are described, alongside indirect effects connected with continental seawater intrusion. Therefore, the need is felt to protect regional groundwater resources and recycle water wasted so far. A more rigorous discharge of depurator waste water into the subsoil 15 strongly recommended.PublishedTaormina, Italyope
L'inquinamento e il sovrasfruttamento delle risorse idriche sotterranee pugliesi
No full textResearch carried out in recent years by CERIST operating unit has investigate Apulian hydrogeological unit groundwater. Different technologies have been applied by researchers, such as: multiparameter hydrogeochemical studies of the evolution of groundwater chemism; thermal infrared survey of coasts where springs were found; studies of varied space distribution of piezometric heads, salinity and water temperature; studies of hydrogeological relationships existing between various underground and sometimes very deep "mains d'eau" studies of protection methods of groundwater against saline pollution.
Recently, research has also focused on human-related pollution of Apulian aquifers. This subject has aroused great topical interest following the continuous and senseless use-of the subsoil for waste water collection. Authors particularly refer to the health, environmental and economic emergency that hit our Region in 1994. The effects of human activity on groundwater pollution and depletion are described, alongside indirect effects connected with continental seawater intrusion. Therefore, the need is felt to protect regional groundwater resources and recycle water wasted so far. A more rigorous discharge of depurator waste water into the subsoil 15 strongly recommended.PublishedTaormina, Italyope
Geology and Geotechnical properties of the sedimentary and volcanic formation referring to engineering works for water and power supply.
No full textRom
Comportamento geotecnico delle Unità Sicilidi ed Irpine affioranti nelle Alte Valli dei Fiumi Sele ed Ofanto a forte evoluzione sismotettonica
No full text
PHENOMENA RELATED TO THE VARIATION OF EOUILIBRIA BETWEEN FRESH AND SALT WATER IN THE COASTAL KARST-CARBONATE AQUIFER OF THE SALENTO PENINSULA
No full textThe state of saline intrusion brought about by uncontrolled abstraction from
the coastal carbonate-karst aquifer in the Salento Peninsula is monitored by
means of a series of observation wells scattered throughout the territory and
drilled at different times during the last 20 years.
One of the methods of determining the state of non-equilibrium between fresh
and salt water is based on the observation of the actual hydraulic head
compared with the theoretical head that the groundwater should have, taking
into account the real position of the transition zone; in this way a non-
equilibrium index can be determined.
Moreover, by means of the plots of salinity against depth, it is possible to
calculate the theoretical position of the salt water interface and if this is
supposed to be sharp instead of a gradual transition.
The relationship between the level of the theoretical sharp interface and the
actual head of fresh groundwater seems to be related to the value of the non-
equilibrium index
The use of pressuremeter for the evaluation of the mechanical characteristics of flysch formations
No full textOne of the limits of the use of laboratory geotechnical tests for the mechanical characterization of flysch formations is connected to the representative of soil or rock samples, because the heterogeneity, the anisotropy and the complex geostructural order of flysch formations strongly affect their large scale mechanical behaviour. To obtain reliable results it is necessary to use test procedures that could involve a large portion of the soil or rock mass, so that it can be considered representative of the material characteristic and of their geostructural order This paper presents the experience of a pressuremeter test campaign executed on flysch formations largely outcropping in the Italy Southern Apennine Pressuremeter tests have made it possible to highlight the different mechanical behaviour of the various lithotypes constituting the flysch, contributing to clarifying how they affect the mechanical behaviour of the whole flysch formation
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