RT Book, Section T1 Groundwater in the Field of Water Policies, in Spain A1 Sotelo Pérez, Ignacio AB Throughout our research we approach the study of the complex world of groundwater, from the idea that we must start from the reality of the hydrological cycle, its phases, and its unity, as an essential part of the Waters Regulations. When dealing with the matter concerning groundwater, we have to point out that these waters are formed as part of natural resources, of great importance not only strategically, but also for each and every one of the aquatic ecosystems that depend on them. These natural resources have been approached from two significant perspectives, which are the need to protect these resources, and the interest in using them for drinking water supplies. From these two perspectives, the purpose arises to achieve the objective that the masses of groundwater used to extract the aforementioned drinking water (or attacked for such purposes for future times), are fully protected, in order to prevent the deterioration of its quality, and of reducing the purification treatment rates required for such purposes. Their study and research brought us closer to the legislative treatment of the European Union and Spain, in the case of the different Directives, up to the National Hydrological Plan or the protection of groundwater from pollution and environmental deterioration. PB Springer SN 978-3-030-86303-6 SN 2199-7373 YR 2021 FD 2021 LK https://hdl.handle.net/20.500.14352/101121 UL https://hdl.handle.net/20.500.14352/101121 LA eng NO Pérez, Ignacio Sotelo. «Groundwater in the Field of Water Policies, in Spain». En Sustainable Policies and Practices in Energy, Environment and Health Research, editado por Walter Leal Filho, Diogo Guedes Vidal, Maria Alzira Pimenta Dinis, y Ricardo Cunha Dias, 577-90. Cham: Springer International Publishing, 2022. https://doi.org/10.1007/978-3-030-86304-3_34. DS Docta Complutense RD 7 abr 2025