Novohradka
The Novohradka is a river in the Czech Republic, a right tributary of the Chrudimka River. It flows through the Pardubice Region. It is long.
Etymology
The river is named after the village of Nové Hrady.Characteristic
The Novohradka originates in the territory of Proseč in the Upper Svratka Highlands at an elevation of and flows to Úhřetice, where it enters the Chrudimka River at an elevation of. It is long. Its drainage basin has an area of. The average discharge at its mouth is 2.52 m3/s.The longest tributaries of the Novohradka are:
| Tributary | Length | River km | Side |
| Ležák | 31.0 | 7.2 | left |
| Žejbro | 30.8 | 10.0 | left |
| Krounka | 24.0 | 29.9 | left |
| Anenský potok | 11.8 | 24.3 | left |
| Prosečský potok | 10.1 | 38.6 | left |
Course
The river flows through the municipal territories of Proseč, Bor u Skutče, Jarošov, Nová Ves u Jarošova, Nové Hrady, Zderaz, Leština, Hluboká, Střemošice, Luže, Lozice, Jenišovice, Chroustovice, Hrochův Týnec, Dvakačovice, Vejvanovice, Úhřetická Lhota and Úhřetice.Bodies of water
There are 597 bodies of water in the basin area. The largest of them is the fishpond Horecký rybník with and area of, supplied by the Žejbro. There are no fishponds or reservoirs built directly on the Novohradka.Nature
According to a research made in the years 2015–2017, 15 species of aquatic molluscs were found in the Novohradka: 7 species of gastropods and 8 species of bivalves. The endangered species of bivalve Unio crassus occurs in the river, although it is not abundant.The upper course of the river flows through the Maštale Nature Reserve. It has an area of and the main object of protection are pine forests and rock formations with a predominance of Cenomanian sandstones. The following course of the river forms a valley protected as the Údolí Krounky a Novohradky Nature Park. The area is characterized by riparian vegetation along the river, scattered greenery, waterlogged meadows and adjacent woodlands. Occurring here are protected species of animals and plants, e.g. fire salamander, northern crested newt and common kingfisher.