query: mouth_of_the_watercourse porsuk river
supports: Turkey, officially the Republic of Turkey (Turkish: ), is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is a democratic, secular, unitary, parliamentary republic with a diverse cultural heritage. Turkey is bordered by eight countries: Greece to the west; Bulgaria to the northwest; Georgia to the northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. The Aegean Sea is to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, which together form the Turkish Straits, divide Thrace and Anatolia; they also separate Europe and Asia. Turkey's location has given it geopolitical and strategic importance throughout history. Eskiehir Province Eskiehir's province population is 844, 842. Eskiehir's urban population is 734,837.Eskiehir is a province in northwestern Turkey. Its adjacent provinces are Bilecik to the northwest, Kütahya to the west, Afyon to the southwest, Konya to the south, Ankara to the east, and Bolu to the north. The provincial capital is Eskiehir. Most of the province is laid down in Central Anatolia Region. Northern parts of Mihalççk district and ones of Mihalgazi and Sarcakaya of her remained in Black Sea Region and Han one of her remained in Aegean Region. A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, 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. An ocean (the sea 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 "sea" is often used interchangeably with "ocean" in American English but, strictly speaking, a sea is a body of saline water (generally a division of the world ocean) partly or fully enclosed by land. Kütahya is a city in western Turkey with 237,804 inhabitants (2011 estimate), lying on the Porsuk river, at 969 metres above sea level. It is the capital of Kütahya Province, inhabited by some 564 294 people (2011 estimate). The region of Kütahya has large areas of gentle slopes with agricultural land culminating in high mountain ridges to the north and west.
  The city's Greek name was Kotyaion, Latinized in Roman times as Cotyaeum. A sea is a large body of salt water that is surrounded in whole or in part by land. More broadly, "the sea" is the interconnected system of Earth's salty, oceanic watersconsidered as one global ocean or as several principal oceanic divisions. The sea moderates Earth's climate and has important roles in the water cycle, carbon cycle, and nitrogen cycle. Although the sea has been traveled and explored since prehistory, the modern scientific study of the seaoceanographydates broadly to the British "Challenger" expedition of the 1870s. The sea is conventionally divided into up to five large oceanic sectionsincluding the International Hydrographic Organization's four named oceans (the Atlantic, Pacific, Indian, and Arctic) and the Southern Ocean; smaller, second-order sections, such as the Mediterranean, are known as "seas". Eskiehir ("old", "ehir" "city", in Greek: "Dorylaeon", ) is a city in northwestern Turkey and the capital of the Eskiehir Province. The urban population of the city is 717,135 with a metropolitan population of 826,135. The city is located on the banks of the Porsuk River, 792 m above sea level, where it overlooks the fertile Phrygian Valley. In the nearby hills one can find hot springs. The city is to the west of Ankara, to the southeast of Istanbul and to the northeast of Kütahya. Known as a university town, both Eskiehir Osmangazi University and Anadolu University (which has one of the largest student enrollments in the world) are based in Eskiehir. The province covers an area of . Istanbul (or ), historically known as Constantinople and Byzantium, is the most populous city in Turkey and the country's economic, cultural, and historic center. Istanbul is a transcontinental city in Eurasia, straddling the Bosphorus strait (which separates Europe and Asia) between the Sea of Marmara and the Black Sea. Its commercial and historical center lies on the European side and about a third of its population lives on the Asian side.
  The city is the administrative center of the Istanbul Metropolitan Municipality (coterminous with Istanbul Province), both hosting a population of around 14.7 million residents. Istanbul is one of the world's most populous cities and ranks as the world's 7th-largest city proper and the largest European city. In antiquity, Phrygia was a kingdom in the west central part of Anatolia, in what is now Turkey, centered on the Sakarya River. The Porsuk River also Kocasu - Porsuk River ( Turkish : Porsuk Çay , Kocasu - Porsuk Çay ) is a Turkish river , that flows for 448 km. The city of Eskiehir is sited on the banks of this river . The river is dammed by the Porsuk I dam and Porsuk II dam forming large reservoirs .
candidates: aegean sea black sea sakarya river sea sea of marmara southern ocean
answer: sakarya river