Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Irrigation Delivery Performance Versus Environmental Externalities: A Risk Assessment and Management Perspective |
| Abstract | This paper presents results from a research and modelling work conducted on an irrigated agricultural area of southern Italy to assess the risks of soil and aquifer degradation occurring as indirect consequence of poor irrigation delivery performance by a water supply system. The area is intensively farmed with high-value market-oriented horticulture by small land-holding growers, and is equipped with a gravity-fed piped irrigation delivery system managed by a local Water Users Organization. Investigations revealed significant aquifer salinity increase from winter to summer months, likely due to intensive groundwater pumping by farmers during peak irrigation demand periods, even though surface water is available to growers from the collective delivery system. Phenomena of seawater intrusion were documented by several research campaigns conducted on the study area in the last decades, as resulting from mining of the coastal aquifer for irrigation and touristic purposes. The environmental hazards of aquifer and soils degradation were appraised through the use of a simplified Risk Assessment procedure, identifying the risk-generating processes and assessing the overall risks significance. The stakeholders' perspective was collected through interviews to growers and delivery system operators, and used to support the risk assessment procedure. Fuzzy Cognitive Maps (FCMs) were developed and used to simulate the groundwater exploitation attitude of farmers versus water withdrawals from the collective delivery network. Some risk mitigation options were identified using dynamic analysis of FCMs to explore the likely reaction of growers' behavior in response to possible changes. Overall, the modelling tools proved to be useful in supporting public participation and representing the knowledge domain of stakeholders in making decision about water resources access, use and management. |
| Source | 1st CIGR Inter-Regional Conference on Land and Water Challenges, Bari, 10-14 September 2013 |
| Keywords | Irrigation delivery systemssoil and aquifer degradationseawater intrusionenvironmental risk assessmentfuzzy cognitive maps |
| Year | 2013 |
| Type | Contributo in atti di convegno |
| Authors | Daniele Zaccaria, Giuseppe Passarella, Daniela D'Agostino, Raffaele Giordano, Samuel Sandoval Solis |
| Text | 260926 2013 Irrigation delivery systems soil and aquifer degradation seawater intrusion environmental risk assessment fuzzy cognitive maps Irrigation Delivery Performance Versus Environmental Externalities A Risk Assessment and Management Perspective Daniele Zaccaria, Giuseppe Passarella, Daniela D Agostino, Raffaele Giordano, Samuel Sandoval Solis Daniele Zaccaria, LAWR University of California, Davis dzaccaria@ucdavis.edu Giuseppe Passarella, CNR IRSA, Bari giuseppe.passarella@ba.irsa.cnr.it Daniela Dagostino, CIHEAM IAM Bari dagostino@iamb.it Raffaele Giordano, CNR IRSA, Bari raffaele.giordano@cnr.it Samuel Sandoval Solis, LAWR University of California, Davis samsandoval@ucdavis.edu This paper presents results from a research and modelling work conducted on an irrigated agricultural area of southern Italy to assess the risks of soil and aquifer degradation occurring as indirect consequence of poor irrigation delivery performance by a water supply system. The area is intensively farmed with high value market oriented horticulture by small land holding growers, and is equipped with a gravity fed piped irrigation delivery system managed by a local Water Users Organization. Investigations revealed significant aquifer salinity increase from winter to summer months, likely due to intensive groundwater pumping by farmers during peak irrigation demand periods, even though surface water is available to growers from the collective delivery system. Phenomena of seawater intrusion were documented by several research campaigns conducted on the study area in the last decades, as resulting from mining of the coastal aquifer for irrigation and touristic purposes. The environmental hazards of aquifer and soils degradation were appraised through the use of a simplified Risk Assessment procedure, identifying the risk generating processes and assessing the overall risks significance. The stakeholders perspective was collected through interviews to growers and delivery system operators, and used to support the risk assessment procedure. Fuzzy Cognitive Maps FCMs were developed and used to simulate the groundwater exploitation attitude of farmers versus water withdrawals from the collective delivery network. Some risk mitigation options were identified using dynamic analysis of FCMs to explore the likely reaction of growers behavior in response to possible changes. Overall, the modelling tools proved to be useful in supporting public participation and representing the knowledge domain of stakeholders in making decision about water resources access, use and management. Proceeding of 1st CIGR Inter Regional Conference on Land and Water Challenges 2 85352 519 8 http //www.landandwater2013.iamb.it/ 1st CIGR Inter Regional Conference on Land and Water Challenges Bari 10 14 September 2013 Internazionale Contributo Irrigation Delivery Performance Versus Environmental Externalities A Risk Assessment and Management Perspective Contributo a convegno Proceeding of 1st CIGR Inter Regional Conference on Land and Water Challenges S3_5_Zaccaria.pdf Contributo in atti di convegno giuseppe.passarella PASSARELLA GIUSEPPE raffaele.giordano GIORDANO RAFFAELE TA.P04.005.008 Integrazione di metodologie per il monitoraggio e la modellizzazione per la gestione delle risorse idriche |