| Title | Migrad: A water allocation model for multi-resources irrigation supply systems in the capitanata district, Italy |
| Abstract | The present work describes a model developed to interpret water allocation patterns in an intensive agricultural district of Southern Italy, supplied both by groundwater (at farm-scale) and surface water (managed by a local authority) with variable costs and specific operation. The model aims at evaluating the impact of some drivers (mainly the water cost) on water resources management and groundwater conservation at the district scale. The model is part of a Decision Support System (DSS) developed to investigate the main dynamics in an agricultural district, integrating in a model based on System Dynamics specific sub-modules (e.g. Crop Water Demand, Surface Reservoir Balance, Groundwater Balance and Farmers' Behavioural Model). Semi-structured interviews were carried out with local stakeholders in order to define (i) the relationship between the irrigation source selection and the water tariff applied in the irrigation district, and (ii) the selection of groundwater, based on cost, to fulfil the irrigation needs. The volumes from surface water were evaluated during the model calibration phase according to the expected irrigation needs, and found to be significantly correlated to the water stock in the reservoir well before the start of the irrigation season. The validation phase showed a good agreement between measured and simulated reservoir irrigation uptakes in the period 2000-2012. It was mainly shown that the preference for a water source depends mainly on the ratio between the surface water tariff and the groundwater pumping cost at farm-scale. The results also demonstrated that a restrictive water tariff policy applied during drought periods produced a marked increase in the groundwater use instead of reducing the water-irrigation consumption. Globally the model allows to better describe the drivers influencing farmers' behaviour and, thus, supports assessing the impacts of water policies, such as those related to water tariff. |
| Source | Water & Society IV, Seville (ES), 05-07/06/2017WIT transactions on ecology and the environment (Print) 216, pp. 323–334 |
| Keywords | water allocation criteriaintegrated water management for irrigationimpact scenariosmulti-resources water supply system |
| Journal | WIT transactions on ecology and the environment (Print) |
| Editor | WIT Press, Southampton, Regno Unito |
| Year | 2017 |
| Type | Contributo in atti di convegno |
| DOI | 10.2495/WS170311 |
| Authors | Zingaro D.; Portoghese I.; Pagano A.; Giordano R.; Vurro M. |
| Text | 379825 2017 10.2495/WS170311 Scopus 2 s2.0 85029876548 water allocation criteria integrated water management for irrigation impact scenarios multi resources water supply system Migrad A water allocation model for multi resources irrigation supply systems in the capitanata district, Italy Zingaro D.; Portoghese I.; Pagano A.; Giordano R.; Vurro M. National Research Council Water Research Institute, UOS, Bari, , , Italy; National Research Council Water Research Institute, UOS, Bari, , , Italy The present work describes a model developed to interpret water allocation patterns in an intensive agricultural district of Southern Italy, supplied both by groundwater at farm scale and surface water managed by a local authority with variable costs and specific operation. The model aims at evaluating the impact of some drivers mainly the water cost on water resources management and groundwater conservation at the district scale. The model is part of a Decision Support System DSS developed to investigate the main dynamics in an agricultural district, integrating in a model based on System Dynamics specific sub modules e.g. Crop Water Demand, Surface Reservoir Balance, Groundwater Balance and Farmers Behavioural Model . Semi structured interviews were carried out with local stakeholders in order to define i the relationship between the irrigation source selection and the water tariff applied in the irrigation district, and ii the selection of groundwater, based on cost, to fulfil the irrigation needs. The volumes from surface water were evaluated during the model calibration phase according to the expected irrigation needs, and found to be significantly correlated to the water stock in the reservoir well before the start of the irrigation season. The validation phase showed a good agreement between measured and simulated reservoir irrigation uptakes in the period 2000 2012. It was mainly shown that the preference for a water source depends mainly on the ratio between the surface water tariff and the groundwater pumping cost at farm scale. The results also demonstrated that a restrictive water tariff policy applied during drought periods produced a marked increase in the groundwater use instead of reducing the water irrigation consumption. Globally the model allows to better describe the drivers influencing farmers behaviour and, thus, supports assessing the impacts of water policies, such as those related to water tariff. Water and Society 2017 C.A. Brebbia Published version http //www.scopus.com/record/display.url eid=2 s2.0 85029876548 origin=inward 216 Water Society IV Seville ES 05 07/06/2017 Internazionale Contributo Contributo in atti di convegno WIT Press 1746 448X WIT transactions on ecology and the environment Print WIT transactions on ecology and the environment Print WIT trans. ecol. environ. Print WIT transactions on ecology and the environment. Print WIT Press 1746 448X WIT transactions on ecology and the environment Print WIT transactions on ecology and the environment Print WIT trans. ecol. environ. Print WIT transactions on ecology and the environment. Print raffaele.giordano GIORDANO RAFFAELE alessandro.pagano PAGANO ALESSANDRO ZINGARO DONATO ivan.portoghese PORTOGHESE IVAN michele.vurro VURRO MICHELE TA.P04.005.007 Strumenti di mitigazione dello stress quali quantitativo per i sistemi idrici |
