Poldr Žichlínek, Detention basin in Rychnov na Moravě, Czech Republic.

Poldr Žichlínek is a dry detention basin south of Žichlínek at the confluence of the Moravská Sázava and Lukovský potok. Its 7.6-metre-high dam holds a 166-hectare flood area with a retention volume of 5.9 million cubic metres. A railway line from Česká Třebová to Přerov divides the basin into a smaller northern part and a much larger southern part.

The dry basin was built to hold back a hundred-year flood of the Moravská Sázava, cutting its peak flow from 126 m³/s to 59 m³/s over five days. It protects Litovel, Olomouc and villages along the Morava. The reservoir is split by the Česká Třebová–Přerov railway line into a northern and a much larger southern part.

The straightened channels of the Moravská Sázava and Lukovský potok were returned to meanders when the dam was built, and wetlands and permanent pools now cover about a tenth of the basin floor. These pools draw birds such as the peregrine falcon, the common crane and the Eurasian oystercatcher, all recorded here.

The basin lies south of Žichlínek at the confluence of the Moravská Sázava and the Lukovský potok, in the cadastral areas of Žichlínek and Rychnov na Moravě. The Česká Třebová–Přerov railway line cuts across the reservoir, dividing it into a smaller northern part and a much larger southern part. The permanently flooded wetlands and pools on the basin floor, about a tenth of its area, are where most birds are seen.

The system includes drainage channels that allow water to flow in controlled ways through the facility. The Moravská Sázava river meanders naturally through stabilized islands within the basin, creating an unusual water channel pattern.