The Ostrava Basin (, , ) is a lowland and a geomorphological mesoregion of the Czech Republic and Poland. It is located in the Moravian-Silesian Region of the Czech Republic and in the Silesian Voivodeship of Poland.
The Ostrava Basin is a mesoregion of the Northern Outer Subcarpathia within the Outer Subcarpathia in the Western Carpathians. The territory is heavily disturbed by Tertiary radial tectonics. The relief has the character of a plain or flat uplands with rounded ridges. Extensive flat floodplains, lined with steep ale relatively low terraces, are typical. An important element of the relief are anthropogenic shapes caused by industrial and mining activities, especially spoil tips. The basin is further subdivided into eights microregions, seven in the Czech Republic and one in Poland: Antoà ¡ovice Plain, Ostrava Floodplain, Karviná Plateau, HavÃÂà Âov Plateau, Nová BÃÂlá Plain, Poruba Plateau, Orlová Plateau (in the Czech Republic) and Koà Âczyce High Plain (in Poland).
The area is poor in hills. The highest peak is Kouty at above sea level, located in the territory of Sedlià ¡tÃÂ.
The territory has an area of , of which in the Czech Republic and in Poland, and an average elevation of above sea level.
Numerous springs are typical for the Ostrava Basin. There is a confluence of several important rivers here: Oder, Olza, Ostravice, Opava and LuÃÂina. The territory contains mineral waters with a unique chemical composition within the Czech Republic (Klimkovice and LáznàDarkov spas).
Coal deposits were discovered in the late 18th century, as a result, the area was heavily industrialized in the 19th century, and henceforth urbanized. The most populated settlements in the territory are Ostrava, HavÃÂà Âov, Karviná, Orlová and BohumÃÂn. Frýdek-MÃÂstek is also partially located here.