**4. Conclusions**

Water resources adaptation and agronomic efficiency scenarios have been applied under two ensemble RCPs (4.5 and 8.5) in the Almyros basin in Thessaly, Greece, using an Integrated Modeling System (IMS). The results according to SCHI, indicate that the groundwater used for irrigation will pose moderate salinity hazards in 2019–2050 in all strategies. Crop yields are expected to decline for most of the cultivars due to irrigation with salinized water, except for the rainfed agriculture/deficit irrigation alternative. CWP could be improved in the future in Strategy B, and EWP scores might be, also, greatly increased. NUE ratings are equivalent to crop yields, which are affected by the salinity status of groundwater used for irrigation. Hence, the future course of seawater intrusion in the Almyros aquifer is a crucial problem that should be addressed in the near future with drastic measures of water resources adaptation to climatic changes and water needs in order to ensure the success of adaptation measures to climate change and the sustainability of local agriculture.

**Author Contributions:** Supervision, review and writing, conceptualization, and methodology by A.L. (Athanasios Loukas); writing review and editing, investigation, data curation, software, methodology, formal analysis by A.L. (Aikaterini Lyra). All authors have read and agreed to the published version of the manuscript.

**Funding:** This research is co-financed by Greece and the European Union (European Social Fund-ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning» in the context of the project "Strengthening Human Resources Research Potential via Doctorate Research" (MIS-5000432), implemented by the State Scholarships Foundation (IK Υ).

**Institutional Review Board Statement:** Not applicable.

**Informed Consent Statement:** Not applicable.

**Data Availability Statement:** The results of this study are freely available.

**Acknowledgments:** This work was based on the Med-CORDEX initiative (www.medcordex.eu) (accessed on 1 February 2023).

**Conflicts of Interest:** The authors declare no conflict of interest.
