sentences:  Water flows via Matarinsalmi sound into Haapavesi, from where it flows through several channels into the Pihlajavesi part of Saimaa.Linnansaari National Park is located in the middle of the lake.The name "Haukivesi" means "pike water", and indeed, the lake is known as a good place to catch pikes, in addition to bream, perch and zander.