Drinking water networks interconnections and green electricity production

Abstract

Purpose – With the concept of interconnection among municipal drinking water networks, this paper presents an innovative methodology aiming to identify potential interconnections and new hydropower possibilities between separate municipal networks, at a regional level. Design/methodology/approach – Beside literature research, water framework directive, interviews with local actors and local case studies were employed. To ensure the soundness of the developed methodology and to give more accuracy to the scientific approach, the presented methodology was tested in a Swiss Alp pilot region (Martigny) composed of 23 independent municipal water networks. Findings – A methodology which makes it possible to compile on a unique map complex and dissociated elements describing water networks and their potential interconnections was developed. Furthermore, the methodology brings these elements together giving decision makers an overview focussed on added-value in terms of water resources and consumption as well as economic and energetic impacts. Practical implications – In a bottom-up approach, the targets of this study have been presented and discussed with all local actors. Some of the suggested interconnections are currently being completed. Originality/value – The use of GIS-based framework as a decision support system would improve the current practice of integrated drinking water management. The developed methodology would be useful for other watershed region where the efficiency of water networks can be greatly improved by the means of a systemic approach and the designing of new network interconnections.