| Klejnárka | |
| Source1 Location: | Dobrovítov, Upper Sázava Hills |
| Mouth Location: | Elbe |
| Mouth Coordinates: | 50.0203°N 15.2733°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Czech Republic |
| Subdivision Type2: | Region |
| Subdivision Name2: | Central Bohemian |
| Length Km: | 40.3 |
| Discharge1 Avg: | 1.32m3/s near estuary |
| Basin Size Km2: | 350.0 |
The Klejnárka is a river in the Czech Republic, a left tributary of the Elbe River. It flows through the Central Bohemian Region. It is 40.3km (25miles) long.
The Klejnárka originates in the territory of Dobrovítov in the Upper Sázava Hills at an elevation of and flows to Konárovice, where it enters the Elbe River at an elevation of . It is 40.3km (25miles) long. Its drainage basin has an area of 350km2.[1]
The longest tributaries of the Klejnárka are:[2]
| Tributary | Length (km) | River km | Side | |
|---|---|---|---|---|
| 30.0 | 7.5 | left | ||
| Paběnický potok | 13.9 | 23.9 | left | |
| Medenický potok | 12.5 | 22.3 | left | |
| Vranidolský potok | 11.5 | 30.4 | right | |
| Černá struha | 10.9 | 1.5 | right |
The Klejnárka does not flow through any significant settlement, it only briefly crosses the territory of Čáslav. The river flows northward through the municipal territories of Dobrovítov, Čejkovice, Zbýšov, Hraběšín, Krchleby, Vodranty, Močovice, Čáslav, Třebešice, Církvice, Nové Dvory, Hlízov, Starý Kolín and Konárovice.
There are 395 bodies of water in the basin area. The largest of them is the Vrchlice Reservoir with an area of, built on the Vrchlice.[1] A system of ponds is built on the upper course of the Klejnárka. The largest of them is Zbýšovský Pond with an area of .[3]
On the upper course of the river near the source, the Jánský potok Nature Monument was declared. It has an area of . The reason for protection is a set of water and meadow ecosystems with the occurrence of common minnow and other protected species of plants and animals.[4]