Map visualisation service (WMS) of the dataset: River basins setting out the general framework for drought measures in the department of Orne.

River basins, defined by the Prefectural Decree of the Orne, laying down the general framework for drought measures. This Order: http://www.orne.gouv.fr/IMG/pdf/20180208_ap_acs_consolide_cle2beadc.pdf, signed 2 July 2012 and amended on 6 February 2018, sets thresholds (vigilance, alert, enhanced alert, crisis) based on: — stream flows observed by measuring stations present on the main rivers of the department. These watercourses are associated with watersheds comprising a number of municipalities and which are subject, individually and in accordance with their own hydrological situation and, where appropriate, to measures to restrict the use of water. — table levels recorded on reference piezometers. To find out the current situation, you can go to the Propluvia website