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• This study develops a smart groundwater governance (SGG) model using a dynamics approach. • It introduces new smart and dynamic models to compensate policy deficiencies. • The study applied both secondary and primary data to model the groundwater cycle. • The results outline the benefits of the model for policy and decision makers in SGG. • The findings allow decision makers to choose the best alternative scenarios toward SGG. Groundwater is one of the most important and vital resources in the world. In current decades, increased water demand and pollution threaten groundwater availability. Yet, groundwater governance is a serious challenge and despite many studies focusing on groundwater assessments, its governance has been largely neglected. Smart groundwater governance is one of the most critical areas to improve the sustainable use of this resource in societies and people's livelihood. The main goal of this paper was to introduce a model to evaluate and measure the smartness level of any policy or action as an index. To do so, this study uses a system dynamics (SD) approach to develop a smart groundwater governance (SGG) model to assist policy and decision makers to better understand the short and long-term impacts of their actions, plans, and policies. For this purpose, the SGG index was introduced in the dynamic model, including four indicators (i.e., equitability, efficiency, sustainability, and democracy) and was applied in Iran. The results indicate that groundwater balance is critical (i.e. negative) and the current trend of groundwater governance is highly non-smart in the country. This study concluded that the best strategy to manage this situation and to govern the groundwater resources in a smarter manner includes both increasing the infiltration rate and decreasing the extraction rate (or increase the water efficiency) as the left and right based scenarios. The obtained results also demonstrate the benefits of the SGG index for policy and decision makers in SGG. [ABSTRACT FROM AUTHOR]

Lifting water is crucial to irrigate agricultural terraces in the Mediterranean region. But the energy demand and emissions of modern forms of water pumping have increased, while many traditional water wheels, which lift water at zero direct emissions, have been abandoned. We explored the state of preservation and the potential for the deployment of traditional water wheels known as "norias" in the Ricote Valley of southeast Spain, where some are still in function, while also investigating the reasons for their widespread abandonment. A mixed method approach is used here to combine GIS-based methods, an expert survey, and a technological and socio-economic assessment of noria renovation. Our findings show that norias in the Ricote Valley have mostly been replaced by thermal-engine water-lifting technologies. The reactivation of traditional irrigation technologies, many of them lying dormant but still standing, could contribute to reducing the high energy demand and the resulting emissions of irrigation systems in the Mediterranean region and beyond. It was estimated by data extrapolation that 16 renovated norias included in our analysis can irrigate 140.3 ha in the Ricote Valley, for a total achievable power of 23.8 kW. To irrigate a similar surface applying diesel motor pumps would produce up to 148 tons of emissions/year and cost up to approx. 70,000 €/year based on a price of 1.25€/l diesel for a maximum of 8760 working hours/year. In the case of electric pumps, we estimate that up to 55 tons of emissions/year and costs up to approx. 48,000 €/year can be saved. Therefore, we argue that rediscovering traditional technologies has potential to contribute to achieving climate actions that reduce GHG emissions (Sustainable Development Goal 13). Moreover, these technologies provide multiple functions and services for a sustainable life on land (Sustainable Development Goal 15), which needs to be considered within a holistic approach. [Display omitted] • Norias are pre-industrial water wheels used for irrigation. • In Ricote Valley, 16 norias irrigated 140 ha with an estimated power of 23 kW. • Their renovation would allow zero-emission irrigation. • We estimate savings of up to 70,000€ and 148 t of CO 2 per year compared to diesel pumps. • Their preservation serves society, ecology and economy. [ABSTRACT FROM AUTHOR]