[en] Highlights: • Hydromorphological restoration by dam removal is still an uncertain operation. • Morpho-sedimentary impacts of a dam removal were monitored for four years. • RFID tracking, SFM photogrammetry and topographical surveys were regularly used. • Non-linear response and hydromorphological restoration on track in the old reservoir. • No clear morphological change donwstream despite bedload continuity being restored. The paper emphasizes the main lessons learned from hydromorphological monitoring following the removal of a medium-sized dam (7.29 m) located on a medium energy gravel bed river over a four year period (2015–2019). The Pierre Glissotte dam was previously located on the upper Yonne river (Morvan massif), where it was an obstacle to sediment continuity and was almost completely filled with sand and silts. The dam was removed in two steps, the first in July 2015 and the second in October 2017. Several methods were used (topographical surveys, SFM photogrammetry, RFID tracking, hydrological monitoring) to characterize river adjustments, i.e. the nature of the morpho-sedimentary dynamics, their rates, their temporal and spatial variations, and their control mechanisms. The results highlight the complex and nonlinear response of the Yonne river and the relevance of a regular prolonged monitoring. The changing patterns in space and over time, underline the vast range of uncertainties surrounding this type of restoration and the difficulty involved in predicting post-removal hydromorphology around the dam (return to pre-dam functioning, no changes, new equilibrium conditions). For instance, up to now, the study shows that intense morpho-sedimentary dynamics in the reservoir and effective restoration of bedload continuity do not necessarily lead to changes in the downstream conditions (bed mobility and morphological configuration) previously shaped under the influence of the dam, thus mitigating the success of the river restoration operation.

[en] A first document synthesises a study which aimed at performing an in-depth assessment of the CEE arrangement (certificate of energy saving), and at proposing recommendations to improve it. The report indicates the objectives and scope of the assessment, presents the adopted methodology and contextual elements, discusses lessons learnt from the assessment, and finally formulate some improvement proposals. A second document contains Power Point presentations of the results of a survey among recipients of the arrangement, of lessons learnt for different sectors (individuals, social renters, industry, private office building), of the implementation quality, of results in terms of energy saving, of the assessment of the arrangement efficiency. It identifies 12 stakes and formulates 16 recommendations related to obligations, governance and animation, management, arrangement efficiency, and quality and fraud.

[en] This first report from the French national observatory of fuel poverty (ONPE) aims at defining fuel poverty and at characterizing and measuring this phenomenon through indicators and inquiries. An additional dimension concerns the vulnerability linked with everyday mobility which is presented in a separate chapter. The national and local policies against fuel poverty are presented with their results, efficiency and possible improvements. A short glimpse on fuel poverty in Europe is given before the conclusion and recommendations