Hydrographic network formed by joining water bodies PHC 2015-2021

Lines representing the axes of the water bodies of the Watershed Plans of the second planning cycle (2015-2021) of the Water Framework Directive. Water bodies exist in two geometries: linear (river-type masses) and polygonal (river-type masses with polygon representation, lake-type masses, coastal water bodies, and transitional water bodies). The Hydrographic Network contains the axes of both types of masses when they are river or lake type; it does not apply to coastal and transitional water polygons, which are not considered to be a hydrographic network. For example, a reservoir will be represented in the network as one or more imaginary lines that run through its interior approximately, and those lines connect the entrances with the water outlets of the reservoir. For a mass with linear geometry (rivers) the axis runs along the same line of the body of water.