Mrlina
The Mrlina is a river in the Czech Republic, a right tributary of the Elbe River. It flows through the Hradec Králové and Central Bohemian regions. It is long.
Etymology
The river was originally named Mrdlina. The name of the river is derived from the Czech words mrlý and mdlý, meaning 'slow', 'faint'.Characteristic
The Mrlina originates in the territory of Markvartice in the Jičín Uplands at an elevation of and flows to Nymburk, where it enters the Elbe River at an elevation of. The river is long. Its drainage basin has an area of.The longest tributaries of the Mrlina are:
| Tributary | Length | River km | Side |
| Štítarský potok | 27.5 | 15.0 | left |
| Hasinský potok | 19.7 | 21.5 | right |
| Velenický potok | 18.2 | 7.3 | left |
| Křinecká Blatnice | 15.3 | 7.3 | right |
| Klobuš | 10.1 | 2.9 | right |