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A Daily water balance estimate for climate risk evaluation at a local scale

Fiori, Mario and Motroni, Andrea and Duce, Pierpaolo and Spano, Donatella Emma Ignazia (2004) A Daily water balance estimate for climate risk evaluation at a local scale. In: 4th International Symposium on Irrigation of Horticultural Crops, 1-6 September 2003, Davis (CA), USA. Leuven, International Society for Horticultural Science. p. 237-243. (Acta Horticulturae, 664). ISBN 978-90-66053-66-3. Conference or Workshop Item.

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Abstract

A methodology for calculating a soil-water balance based on climatological and pedological data of Sardinia (Italy) is presented. Daily temperature and rainfall data from reference period 1971-2000 were spatially interpolated on a 10 km x 10 km cell grid to obtain a set of homogeneously distributed values. Pedological information of Sardinian soils were used to characterize the entire territory of Sardinia in terms of available water content (AWC) and soil depth. Reference evapotranspiration values ( ETo) were estimated using the Hargreaves method and actual evapotranspiration estimates (ETa) were calculated as function of soil water content for each grid cell. A simplified soil water balance was calculated for each grid point and year to determine the average daily soil water content over the thirty-year period. Climatic risk was evaluated considering the number of days when soil water content was below 50% of available water content threshold for each year of the 1971-2000 period. Results show a wide variability of interannual climatic and water deficit conditions throughout the region. Maps of spatial distribution of drought conditions show that the dryest years were from 1996 to 2000. During this 5-year period, about 60% of the Sardinian territory was affected by severe climatic conditions which determined high climatic risk for agricultural areas.

Item Type:Conference or Workshop Item (Paper)
ID Code:5288
Status:Published
Uncontrolled Keywords:Aridity index, climate variability, soil water balance, agriculture, soil water availability, Sardinia
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/03 Arboricoltura generale e coltivazioni arboree
Area 07 - Scienze agrarie e veterinarie > AGR/12 Patologia vegetale
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di biometeorologia, Sassari
001 Università di Sassari > 01 Dipartimenti > Economia e sistemi arborei
002 Altri enti e centri di ricerca del Nord Sardegna > SAR-Servizio Agrometereologico Regionale per la Sardegna, Sassari
001 Università di Sassari > 01 Dipartimenti > Protezione delle piante
Publisher:International Society for Horticultural Science
ISBN:978-90-66053-66-3
Deposited On:10 Jan 2011 11:10

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