Author(s): R. Madelbos; M. Abily; F. Picourlat; Y. Ouassanouan; S. Granados-Bolanos; F. Billaud; Q. Ma; E. Tric
Linked Author(s):
Keywords: REUSE; DSS; AquaVar; Integrated approach; Performance indicators; Strategic planning
Abstract: Water REUSE solutions are declined in two categories: direct and indirect solutions [1]. Those solutions are established to consider treated waste water as resources and contributes to supply a specific area in non-conventional water resource. In those terms REUSE solutions are determined to respond to local needs and are note integrated inside a territorial or integrated point of view. Beside numbers of watershed resources managers develop Decision Support System at the catchment scale. Aiming to address multiple complex issues regarding water resources, DSS involve to support fields such as hydroinformatics [2, 3, 4]. DSS permits water resources managers to develop integrated strategies helped by numerical modeling. In another hand, few water REUSE solutions are territory integrated. The example of the REUSE solutions of the Llobregat are the most relevant case of study. They are implemented since the 80s and are still in studies [5, 6]. Yet, REUSE strategic planning at catchment scale is not the common practice. Therefore, the numerical modeling potential of DSS remains underexploited in that regard. This poster will provide a perspective to translate or implement REUSE solution inside DSS or numerical modeling. Each solution is determined as system and composed of different data (regulation, geographical, hydrological). To evaluate and compare REUSE solution across an area, data are considered as variables and integrated inside Performance Indicator (PI) system. The system is established using a hybrid approach – combining top-down and bottom-up – to identify operational PI (Strategic Performance Indicator, SPI) and to aggregate variables to PI (as the IWA method [7]). This PI approach afford to evaluate non operant REUSE solution through numerical modeling using results as variables [8] following a water – economic – sanitary/environmental nexus approach [9]. This work seeks to apply this methodology on the lower Var valley, a French Mediterranean catchment. AquaVar is an integrated DSS of the Var catchment composed of three numerical models: Mike SHE, Mike 21 and FEFOW (DHI). It has been developed to represent physical water processes (hydrological, hydraulic and hydrogeological) at the catchment scale [10]. Nonetheless, the actual use of the DSS doesn’t take in charge REUSE solutions. The watershed faces Mediterranean hazards and is bounded by a high anthropogenic pressure on the coastal area (Nice metropolis area). Finally, the goal for water REUSE solution will be to implement inside numerical modelling approaches strategic planning for mid and long-term scenarios.
Year: 2026