Drinking water networks are a high value asset with a long service life; their management must thus adopt a long-term approach and adapt to changes in their environment, mainly connected to global change and new technologies. The key challenge of this “asset management” is the annual renewal of a small portion of pipelines, in order to mitigate the effects of ageing on their performances, and to prevent the deterioration of the quality of service. It thus concerns technical, organisational (service), economic and financial (costs and benefits), environmental (resources) and societal (territorial governance, users) issues, which call for interdisciplinary answers enlisting engineering, mathematics and social sciences.
In this context, the ROC project aims to develop tools and methods allowing potable water distribution system authorities to build asset management strategies oriented towards limiting water loss and safeguarding water quality. The study sites are located in the Région Nouvelle-Aquitaine.
Today, health risks (in particular linked to the presence of Vinyl Chloride Monomer (VCM) in PVC pipes) and the limitation of water loss are usually driving the decision regarding water pipes renewal. However, the methodological reflection remains focused on risks of service interruptions and impacts of malfunctions on the urban environment. A major challenge for research thus lies in taking into account the other dimensions of the performance of water supply service, namely integrity of the network (resource protection) and water quality (among which the issue of CVM). This is especially true since, in most cases, actions undertaken to satisfy one axis of performance are sub-optimal for the others. It appears that technical sciences are able to generate new knowledge on each axis taken separately. However, their integration, which is an operational necessity, requires a more complete picture on the issue and the resort of economics. To achieve this goal, we propose to use a Cost-Benefit Analysis (CBA), which seems to allow taking into account the multi-objectives character of asset management.
The postdoctoral student will lead the CBA in order to compare three asset management strategies leading to the same amount of work but each focusing on one specific dimension of service performance (water quality; service continuity and protection of the urban environment, that is to say prevention against breakages; limitation of water loss), while considering the water price. More precisely, the postdoctoral student will have to:
Your pre-selection application should include a CV and an up-to-two-page cover letter describing your interest in the subject and a post-doctoral research project on the basis of the information provided above. An initial selection from the applications received will be made; a hearing will then be organised.