Sustain-COAST Deliverable 3.3a: Report on cost efficiency and cost-benefits of selected preventive scenarios

This report presents the main activities of the WP3 team on the project Sustain-COAST in the topic cost efficiency and cost-benefits of selected preventive scenarios. Efforts were spent to identify the cost-benefit use of water resources and to mitigate groundwater depletion and degradation in each case study of the four Sustain-COAST demonstration sites. The choice of the appropriate mitigation technique in each case study mainly depends on the site conditions. This task is presented as a pilot for each demonstration site and will be updated in part b (D3.3b), considering local data and the final suggestions by all stakeholders in each case study. To this end, the full cost-benefit methodology is presented, and the optimal options for managed use of groundwater and surface water is presented for each case study. The mapping of those options is a dynamical process and will be adjusted over the course of the project, where key stakeholders can be added at a different stage to enrich the multi-stakeholder partnership process. The provided information will give insights into assessing the sustainability of the current and future groundwater management strategies. This analysis will identify the impact of the adequate mitigation option considering sustainable water resources availability, management, and pollution risks