sentences:  The water finally ends in the Lauwersmeer and Waddenzee.In Groningen and the northernmost part of Drenthe the water is known as Drentsche Aa (sometimes Aa in Groningen), but in Drenthe it has a multitude of local names, such as "Deurzerdiep", "Looner Diep", "Taarlosche Diep", "Oudemolensche Diep", "Schipborgsche Diep", and "Westerdiep".A large part of the catchment of the Drentsche Aa is located in the Drentsche Aa National Landscape.