5 thematic challenges have been identified: water reuse and recycling (1); water and waste water treatment (2); flood and drought risk management (3); ecosystem services (4); and water-energy nexus (5), as well as 3 cross-cutting issues (water governance; decision support systems and monitoring; financing for innovation).
Piirkondadevaheline koostöö (INTERREG IV C): projektid on rangelt suunatud kogemuste vahetamisele ja lihtsamatele katsealgatustele (meetodite ja vahendite katsetamine).