4. Conclusion

Storm overflows are designed neither to allow metrological monitoring, nor to facilitate their simulation by models, and are subject to significant layout constraints. Nevertheless, a whole range of solutions are available to deal with most of the configurations encountered, sometimes at the cost of successive fine-tuning and approximations, the consequences of which are not always easy to assess. A major challenge is therefore to adapt the resources deployed to the quantity and quality of the information obtained. In particular, it is useful to verify the actual activity of the weirs to be instrumented or modeled, and even to consider the specific function and usefulness of each structure in relation to the collection system as a whole. This preliminary reflection also involves measurement and modeling, albeit in simplified forms. Temporary measurements, even over a fairly long period (one...