Alla ricerca... dei rifiuti interrati

Alcune metodologie geofisiche permettono di individuare rifiuti interrati illegalmente nel sottosuolo e di studiare alcune forme di inquinamento sotterraneo. Tali tecniche sono state sviluppate presso il Laboratorio di Geofisica Ambientale dell’Istituto Nazionale di Geofisica e Vulcanologia e vengono applicate su richiesta dei Carabinieri per la Tutela dell’Ambiente e del Corpo Forestale dello Stato. I rifiuti tossici interrati illegalmente nel sottosuolo sono molto pericolosi perché inquinano il terreno e le falde acquifere; inoltre queste sostanze tossiche possono entrare nella catena alimentare e nuocere alla salute umana

Strumenti economici nel diritto ambientale europeo

Il contributo sviluppa l'analisi dei principi economici alla base delle norme finalizzate a correggere le esternalit\ue0 ambientali. Dopo avere analizzato gli strumenti tipici del diritto privato, fra i quali la tutela risarcitoria, vengono illustrati gli strumenti di diritto pubblico, soffermandosi su standard emissivi, tassazione ambientale e meccanismi di cap and trade. Si effettua infine un'analisi comparata fra i diversi strumenti, evidenziando vantaggi e limiti di ciascuno

Lineamenti geo-morfologici e idrogeologici del Turritano e della Nurra settentrionale (Sardegna): contributo per un'utilizzazione razionale delle risorse idriche sotterranee di Sassari

L'Autore studia le condizioni fisiche del sottosuolo del Sassarese al fine di sapere se le necessità di acqua della città possano essere integrate dallo sfruttamento delle falde freatiche. La ricerca riguarda le caratteristiche climatiche, geologiche, geo-morfologiche e idrologiche del territorio di Sassari e della Nurra Settentrionale, aree appartenenti per la maggior parte al Comune di Sassari. L'Autore conclude affermando che è possibile captare, attraverso uno sfruttamento razionale, almeno 350 l/sec di acqua dal sottosuolo esaminato. The Author has studied the physical conditions of the subsoil of Sassari and its surroundings in order to know if the water need of the city can be integrated by the exploitation of water-bearing strata. The investigation was carried on the climatic, geologic, geomorphologic and hydrographic characteristics of the area around Sassari and Northern Nurra, for the most part belonging to the district of Sassari. The Author concludes by stating that it is possible to extract, through a rational exploitation, at least 350 l/sec. of water from the subsoil examined

Condizioni di emergenza della sorgente Niella di Lagonegro

The Niella spring is located on north Mount Sirino slope. The spring aquifer is characterized by the presence of localized fissures in carbonatic rock. The spring is the highest of the aquifer end is placed at half slope. Flinty limestone outcrops along the whole slope; the spring area is characterized by debris outcrops. Spring water comes out in these conditions for described tectonic influence on aquifer permeability. Geological-structural conditions end the effects on groundwater flow are described

Studio geo-idrologico della Sardegna settentrionale: memoria 6.: il bacino idrografico del Fiume Temo

This comment consists essentially of three well defined partes: the is first physical geography, the second hydrogeology and the last is hydrogeochemistry. The AA., after a preliminary and organic geological investigation which permitted the preparation of the map (Fig. 3) in which the various geolithologic units are corelated, then made a particular study of the principal geomorphologic structures present in the entire basin. The multiple presence of such structure is justified in the geological difference of the formations present. Among the typical structures of the basic vulcanites was the evidence of cushion lava, block lava and tabularcolumn lava; among the typical acid vulcanites are the stratoid lava and the cave like structures. Also the evidence were the pointed tabular structures, the concave tabular structures and the dip-shop, tabular structures present in the series of lava flows, and of porous stone deposits and sea deposits in alternate stratus. The part relative to the hydrogeology was preceded by an examination of the climatology and the hydrometry of the basinc. Five meteorological rain measuring stations and two thermometeorological rain measuring stations were used for this study and the following information were gathered: - the maximum precipitations were concentrated in the late autumn period, in winter and in the early spring; the maximum aridity was during the summer months; there is a great irregularity in the intensity of the precipitations; within the area of the basin proportional differences of values of precipitation due to altitudes do not exist. The hydrometric characteristics of the basin have been brought to light using the information of hydrometric data given by the station at Reinamare. From an hydrological point of view, by suddividing the general area into thre larges complexes based on their permeability, the most important hydrogeological series and water structures of the basin have been located. As well as this, 60 perpetual water springs have been registered, and for the most part they have been actually identified and their waters have been analized and studied. These analysis have proved the waters as belonging to three families: magnesium-chloride water, sodium-bicarbonate water and sodium-sulphate water. This latter water family which includes the majority of the springs, whose sources are diffused almost all over the enti re area of the basin, presents a fairly similar chemical characteristic as we have found by using linear co-relations with pairs of geochemical «parameters»

Sinossi dell’approccio teorico alle problematiche ambientali in campo agricolo e naturalistico; il progetto di ricerca nazionale F.I.S.R. – M.I.C.E.N.A.

The present work is a thought and increased synthesis of the relation published by the I.P.C.C (UNEP-WMO) on the Global Climate Changes. The purpose is to supply the researchers of our Department ,with a solid base theoretical where to anchor the studies that they will execute for the national FISR-MICENA project.agricoltura, biodiversità, clima, coste, economia, ecosistemi, energia, foreste, inquinamento, impatti, natura, mutamenti climatici, mutamenti ambientali, precipitazioni atmosferiche, previsioni

Indagine geoelettrica per la valutazione dell'intrusione salina negli acquiferi costieri del comprensorio meridionale veneziano

Riassunto Attraverso l’indagine geoelettrica è stata eseguita una prima valutazione dell’estensione dell’intrusione salina marina e lagunare nel settore meridionale del comprensorio veneziano. Nel settore costiero, caratterizzato da dune e cordoni litoranei, è presente una falda freatica con acqua “dolce” fino ad una profondità di anche una decina di metri e l’intrusione salina coinvolge i terreni sottostanti fino ad oltre 70 metri. Nell’entroterra, la soggiacenza del territorio rispetto al livello marino, i pompaggi con idrovore e la rete idrografica pensile in comunicazione col mare sono fattori che riducono a pochi metri, ed in alcune zone annullano, lo spessore della falda dolce superficiale e consentono al cuneo salino di raggiungere la base dei terreni coltivati. Abstract A preliminary evaluation of the salt water intrusion in coastal aquifers of the southern Venetian region, is here made using geoelectical investigation. The results of the analyses show that the two dimensional extent of the saline contamination is mainly related to the geomorphology of this area. In the littoral sector, characterized by a mean ground elevation of two meters above mean sea level (sand dunes and paleolittoral strips), a phreatic fresh water body is present and salt water contamination involves aquifers and aquitards from 10 to 70 m deep. In the inland, the ground level is about 2-3 m below mean sea level; the water pumping in the reclaimed lands and the marine water seepage in the rivers during high tides are among the factors that seriously reduce the fresh water body and that allow salt water to contaminate the agricultural soils