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Titolo:
Causal processes of soil salinization in Tunisia, Spain and Hungary
Autore:
Schofield, R; Thomas, DSG; Kirkby, MJ;
Indirizzi:
Univ Leeds, Sch Geophys, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT S2 9JT, W Yorkshire, England
Titolo Testata:
LAND DEGRADATION & DEVELOPMENT
fascicolo: 2, volume: 12, anno: 2001,
pagine: 163 - 181
SICI:
1085-3278(200103/04)12:2<163:CPOSSI>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CENTRAL NAMIB-DESERT; SOUTHERN TUNISIA; GYPSUM CRUSTS; THERMOMINERAL WATERS; GEOCHEMISTRY; GROUNDWATER; BASIN; ORIGIN; FIELD; CO2;
Keywords:
soil salinization; land degradation; irrigation; saline soils; alkali soils; Hungary; Tunisia; Spain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
98
Recensione:
Indirizzi per estratti:
Indirizzo: Schofield, R Univ Leeds, Sch Geophys, Leeds LS2 9JT, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9JT kshire, England
Citazione:
R. Schofield et al., "Causal processes of soil salinization in Tunisia, Spain and Hungary", LAND DEGR D, 12(2), 2001, pp. 163-181

Abstract

Soil salinization arises due to the build up of soluble salts at or near the soil surface. Salts accumulate by primary and secondary processes that alter the soils physicochemical properties and lead to direct and indirect soil degradation. Results are presented here from the study of three contrasting salt-affected landscapes. The Chott el Fedjadj, Tunisia, is a naturally salt-affected basin containing saline sediments deposited during a marineincursion. The endoreic conditions lead to salt recirculation, concentration and reprecipitation. In the Guadalentin Valley, Spain, increased irrigated agriculture has led to aquifer overexploitation releasing gas and salts. Irrigating with the resultant contaminated groundwater has induced soil salinization. The salt accumulation and translocation is dictated predominantly by irrigation method, water quality and quantity. Hungary has the largest expanse of naturally salt-affected soil in Europe, with the dominant soiltype being solonetz. In Hungary the type of salt-affected soil developmentis related to the salts present, hydraulic properties of the soil and depth and quality of the watertable. In Tunisia a catenary relationship of increased water and soil salinity towards the centre of the chott is found, whereas in Spain the highest salinities were found under flood irrigation withthe valley displaying a complex spatial distribution of soil salinity. Thesediment distribution in Hungary dictates that solonchak soils are found mostly in the Danube-Tisza interfluve and solonetz soils in the Tisza floodplain, with localized variations in soil type related to watertable characteristics. Copyright (C) 2001 John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 02:40:49