Černá Nisa

Černá Nisa is a river in Liberec District in the Czech Republic. It is 14.2 km long. Its drainage basin has an area of 27 km².

Geography
It originates east of Olivet Mount in the Jizera Mountains and has a predominantly torrential nature with a considerable drop and a rocky river bed. It flows into Lusatian Neisse from the right in Stráž nad Nisou.

Usage
The Bedřichov Water Reservoir stands on its upper course. Another small water reservoir is in Rudolfov below the hydroelectric power plant fed by an underground channel from the Bedřichov Dam. It is used for boating from Rudolfov to Kateřinky. It is a trout river used in the past by many industrial enterprises in Kateřinky.