Sarıyar Dam on the Sakarya River is north of the town of Sarıyar in the Nallıhan district of Ankara Province. It is west of the city of Ankara, the central Anatolian capital of Turkey. It is located upstream of Gökçekaya Dam on the Sakarya River, which runs into the Black Sea. It was completed in 1956. The total power output from the hydroelectric facility is 160 MW (four facilities of 40 MW each).
Sarıyar Reservoir is impounded by the dam, and provides habitat for several species of tree- and cliff-nesting waterbirds and raptors. Migrating white storks (Ciconia ciconia) roost here in large numbers. Poplars (Populus sp.) grow around the shore, and provide timber and habitat for birds and other wildlife. The reservoir is polluted by agricultural runoff and untreated waste from Ankara.
Sources
Structurae: Sariyar Dam Researchgate.net: The technical features of Goekcekaya Sariyar and Yenice Dam Lakes