http://www.cnr.it/ontology/cnr/individuo/prodotto/ID29542

Groundwater resource degradation in coastal plains: the example of the Cecina area (Tuscany -Central Italy). (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Groundwater resource degradation in coastal plains: the example of the Cecina area (Tuscany -Central Italy). (Articolo in rivista) (literal)

Anno

2007-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.apgeochem.2007.04.025 (literal)

Alternative label

Grassi S.; Cortecci G.: Squarci P. (2007)
Groundwater resource degradation in coastal plains: the example of the Cecina area (Tuscany -Central Italy).
in Applied geochemistry; Academic Press Ltd., Elsevier Science Ltd., London (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Grassi S.; Cortecci G.: Squarci P. (literal)

Pagina inizio

2273 (literal)

Pagina fine

2289 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

22 (literal)

Rivista

Applied geochemistry (Rivista)

Note

scopus (literal)
ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Istituto di geoscienze e georisorse (literal)

Titolo

Groundwater resource degradation in coastal plains: the example of the Cecina area (Tuscany -Central Italy). (literal)

Abstract

The paper describes the degradation of the groundwater resources in the Cecina area, where seawater intrusion, B contamination and NO3 pollution are all affecting the heavily exploited Pleistocene aquifer. Over-pumping has brought water levels to about 0 m.a.s.l. as far as about 7 km from the shore line, thereby promoting the seawater intrusion. The intrusion, which is characterized by cation exchange phenomena and Ca-Cl type waters, enters the plain mostly through the shallower horizons. The saline front, which advanced from 0.5 to 1 km in 4 a, has by now reached the foot of the hills to the east of the town, where it is also affecting wells of the local aqueduct. Boron contamination, linked to past discharge of industrial waste transported downstream by the river, reached concentrations as high as 3.5 mg/L in the mid-1980s. Although a decreasing trend is now under way, B content is still close to 1 mg/L. The presence of high NO3, which, together with the seawater intrusion, represents a major issue for groundwater management in the area, is linked to the widespread utilization of fertilizers. Nitrate concentration, which reaches a maximum of about 300 mg/L in the shallow aquifer horizons and then decreases rather regularly with depth, is strongly influenced by precipitation. However, irrigation also contributes significantly to transporting the NO3 contamination to depth, as clearly shown by d18O data. The severe decline in the quality of the groundwater resource in the Cecina area is further compounded by an overall decrease in water availability in the region of Tuscany, as evidenced by long-term monitoring of precipitation and fluvial discharge. ? 2007 Elsevier Ltd. All rights reserved. (literal)

Editore