mouth_of_the_watercourse aschach 
A ___MASK79___ is a large body of salt water that is surrounded in whole or in part by land . More broadly , " the ___MASK79___ " is the interconnected system of Earth ' s salty , oceanic waters  considered as one global ocean or as several principal oceanic divisions . The ___MASK79___ moderates Earth ' s climate and has important roles in the water cycle , carbon cycle , and nitrogen cycle . Although the ___MASK79___ has been traveled and explored since prehistory , the modern scientific study of the ___MASK79___  oceanography  dates broadly to the British " Challenger " expedition of the 1870s . The ___MASK79___ is conventionally divided into up to five large oceanic sections  including the International Hydrographic Organization ' s four named oceans ( the Atlantic , Pacific , Indian , and Arctic ) and the ___MASK2___ ; smaller , second - order sections , such as the Mediterranean , are known as " seas ". An ocean ( the ___MASK79___ of classical antiquity ) is a body of saline water that composes much of a planet ' s hydrosphere . On Earth , an ocean is one of the major conventional divisions of the World Ocean , which covers almost 71 % of its surface . These are , in descending order by area , the Pacific , Atlantic , Indian , Southern ( Antarctic ), and Arctic Oceans . The word " ___MASK79___ " is often used interchangeably with " ocean " in American English but , strictly speaking , a ___MASK79___ is a body of saline water ( generally a division of the world ocean ) partly or fully enclosed by land . The ___MASK95___ (, known by various names in other languages ) is Europe ' s second - longest river , after the Volga River , and also the longest river in the European Union region . It is located in Central and Eastern Europe . The Aschach is a river of Austria . It is a tributary of the Innbach The Innbach is a river in Upper Austria with a length of approximately 53 km ( 33 mi ). Its source is near Gaspoltshofen at the foot of the Hausruck hills and empties into the ___MASK95___ at Wilhering . Its drainage basin covers 196 km² ( 76 sq mi ). After Gaspoltshofen , the Innbach passes the towns of Kematen am Innbach , Pichl bei Wels and Bad Schallerbach , at the mouth of the Trattnach . Near Eferding , it joins with the Aschach and a few kilometers later flows underneath the ___MASK95___ Power Station and into the ___MASK95___ . Geography . Eferding is the center of the Eferding basin . The city is 2 km away from the ___MASK95___ River . It has the most moderate climate in Upper Austria . A river is a natural flowing watercourse , usually freshwater , flowing towards an ocean , ___MASK79___ , lake or another river . In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water . Small rivers can be referred to using names such as stream , creek , brook , rivulet , and rill . There are no official definitions for the generic term river as applied to geographic features , although in some countries or communities a stream is defined by its size . Many names for small rivers are specific to geographic location ; examples are " run " in some parts of the United States , " burn " in Scotland and northeast England , and " beck " in northern England . Sometimes a river is defined as being larger than a creek , but not always : the language is vague .