River basin districts (land area)

Land area of river basin districts, defined in accordance with the provisions of the Water Framework Directive. The Hydrographic Demarcation is defined as the terrestrial and marine zone composed of one or more neighbouring river basins and the transitional, ground and coastal waters associated with those basins. The boundary between the land and the marine scope of the river basin districts has been established using the inland line of the coastal and transition masses of the 2016-2021 Hydrological Plans. This data set derives, therefore, from the data set of Hydrographic Demarcations (land and marine areas), once the marine area of the same has been removed. The current version of this data set (September 2021) is adapted, in the land area of the demarcations, to Order TEC/921/2018 of 30 August, which defines the lines indicating the main cartographic limits of the territorial areas of the hydrographic confederations in accordance with the provisions of Royal Decree 650/1987 of 8 May, defining the territorial areas of river basin organisms and hydrological plans.