In Sicily, the increasing scarcity of quality water is leading to irrigationwith saline water in soils having a considerable susceptibility tosalinization and degradation. In this paper, water flow and solutetransport in a Sicilian irrigated soil was simulated by using the SWAPmodel, and the simulated results compared to measured values of soilmoisture and salinity. The investigation was carried out in a vineyard located in Sicily (Mazara del Vallo, Trapani) within the framework of the Project Evolution of cropping systems as affected by climate change(CLIMESCO). The soil hydraulic parameters were obtained by inversemethod based on multi-step outflow experiments. The results obtainedusing field measurements from two soil profiles showed that SWAPprovided reliable predictions of water content, θ, and of electrical conductivityof saturated extract, ECsat. The effect of climate change on soilwater balance was predicted by application of SWAP under the soilcropand irrigation management conditions currently practiced in thevineyard. Simulations were carried out with climatic data generated bythe statistical downscaling process based on the global CGM HADCM3for two IPCC scenarios (A2 and B1) and for the 2070-2100 time interval.The two mentioned IPCC scenarios (A2 and B1) were then comparedto a third reference scenario (BASELINE) obtained by using theclimatic data recorded from 1951 to 2004. The results indicated thatthe only significant effect of climate change was to shorten and toadvance the crop cycle length, which decreased of 16 and 27 daysrespectively in B1 and A2 compared to values obtained for the BASELINEscenario. Further application of SWAP carried out simulating anadvance in the irrigation starting time according to the advance in thecrop cycle indicated that this could be considered a kind of adaptationstrategy to be applied in the future in the vineyard to counterbalancethe impact of climate change. This means that in the future farmersmight be likely to anticipate the irrigation season in order to avoid anysignificant reduction in the crop productivity.
|Numero di pagine||8|
|Rivista||ITALIAN JOURNAL OF AGRONOMY|
|Volume||volume 7:e17 Non-commercial|
|Stato di pubblicazione||Published - 2012|
All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science