## 4 Conclusions  
After the investigation carried out, it is concluded that (i) the Canal de Castilla, despite its heritage protection, shows a certain abandonment requiring economic means for its solution, (ii) there is a possibility of sustainable energy use linked to Lock 2, and (iii) after carrying out a survey in a representative sample of the population of Alar del Rey, the place where the canal begins, the degree of importance that the canal represents for the local  
Figure 10: Fuzzy logic output for axial turbine performance in designated canal conditions. population is verified, exposing said sampled population to different options and solutions for the Canal de Castilla. The comprehensive survey conducted in Alar del Rey provides valuable insights into the community's perspectives and expectations regarding restoration and sustainability initiatives for the Canal de Castilla. The diverse sample of 100 individuals, representing different age groups, educational levels, and residency statuses, establishes a solid foundation for the conclusions drawn from the survey. The results showcase broad participation that captures the views of both local and nonpermanent residents, ensuring a comprehensive understanding of the community's needs and expectations. When examining the importance of building development initiatives for the Canal de Castilla, the survey reveals strong consensus among respondents. The majority, 87%, perceive the impact of such initiatives as \"High\" to \"Very High\". This indicates widespread support for construction-related measures aimed at improving the structure and function of the canal, emphasizing favorable public opinion towards investing in its architectural renovation and infrastructure maintenance. Regarding the role of research in enhancing the canal's value, the survey indicates overwhelming support, with 85% of respondents rating the importance of research as \"High\" to \"Very High\". The distribution illustrates solid community backing for academic and scientific efforts related to the canal, underlining the perception of the significance of informed studies for its restoration and sustainable development. From the survey analysis, it is evident that there is a community consensus supporting the restoration and modernization of the Canal de Castilla, particularly its locks and the introduction of sustainable technology such as axial turbines. The public's favorable perception of these developments indicates a recognition of the potential socio-economic and environmental benefits that such advancements could bring. Emphasis on heritage conservation alongside technological innovation underlines the community's desire for progress that respects and preserves historical integrity. The fuzzy logic analysis further solidifies the feasibility of integrating axial turbines into the canal's ecosystem. Based on a previous analysis, two axial turbines were selected given that their placement in the channel would not cause modifications that alter the construction, which is protected heritage. Both turbines show high success probabilities under the examined water conditions, with the models indicating a slight preference for Turbine 1. This suggests that the canal can indeed support such sustainable technology without the need for invasive structural changes, aligning with the community-driven survey results that call for eco-friendly and culturally sensitive upgrades. The limitations of this study primarily revolve around the constraints imposed by the Canal de Castilla being a protected heritage site and the practical considerations related to installing turbines within its watercourse. As a protected historical construction, there are strict regulations to preserve its architectural integrity and cultural significance. This imposes limitations on the extent to which modifications can be made to the canal's infrastructure, including restrictions on installing turbines directly in the watercourse, as this could hinder navigation and disrupt the historical ambiance of the canal.