 |
| Titel |
Geophysical and stratigraphical research into deep groundwater and intruding seawater in the mediterranean area (the Salento Peninsula, Italy) |
| VerfasserIn |
S. Margiotta, S. Negri |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1561-8633
|
| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 5, no. 1 ; Nr. 5, no. 1 (2005-01-25), S.127-136 |
| Datensatznummer |
250002198
|
| Publikation (Nr.) |
 copernicus.org/nhess-5-127-2005.pdf |
|
|
|
|
|
| Zusammenfassung |
| Geological, geophysical and hydrological surveys were performed in an area
between Lecce to the North and Otranto to the South on the Lower Adriatic
coast of Italy in order to verify the ``state of health'' of the ground
water in the deep aquifer, which is characterised by Mesozoic carbonatic
formations and is permeable due to fracturing and karstic phenomena. This
area was chosen because it is highly urbanised, and contains many wells,
some of which were intensively studied from a geological and
hydro-geological point of view in 1987. The first phase of the research
consisted of a stratigraphical and geological study, based on geological
surveys of the surface and the subsoil by direct observation of borehole
cores and the collection and analysis of existing stratigraphical data on
wells in the area. The stratigraphical and hydrogeological data are kept in
the archives of local agencies. The collected data were organised in a
single database managed by an appropriate software (ARCVIEW). Numerous
geological cross sections of the territory were studied in order to
characterise the subsoil. Subsequently, multi-parameter surveys (O2,
pH, temperature, TDS, conductivity) were carried out on the water-column of
certain wells selected from those studied in 1987. This was to verify
possible changes in the state of the groundwater since 1987. The surveys
were carried out in two different periods (May and September) in order to
identify potential differences between rainy and dry periods. Moreover,
electrical tomography was used to characterise the various subsurface
geological formations and possible saline water intrusion where direct
information collected from the wells was lacking.
From the research conducted it was possible to effect a stratigraphical
characterisation of the subsoil and to verify overexploitation of the water
resources resulting from the increasing number of wells, and the consequent
deterioration of the aquifer due to saline water intrusion. The research
also confirms the validity of geophysical methods for the study of
hydro-geological issues. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|