Reppisch basin

Türlersee is a lake in the district of Affoltern, Canton of Zurich, Switzerland. It lies on the border of the municipalities of Aeugst and Hausen am Albis at an elevation of 643 m. The lake has an area of 0.49 km² (maximum length 1.4 km, width 500 m).

The Reppisch () is a river in Switzerland. It rises in the Türlersee and joins the Limmat as its tributary, near the town of Dietikon. The Reppisch flows in the Säuliamt (Affoltern district), canton of Zürich, an area featuring still partially untouched nature.

The Wüeribach (also called the Dorfbach and Fischbach in its upper reaches) is a tributary of the Reppisch, around 8 kilometres long, in the Canton of Zürich in Switzerland. It rises in the municipality of Bonstetten, flows through the narrow Wüerital valley and reaches the Reppisch valley near Birmensdorf, wo it empties, parallel to the rather smaller Lunnerenbach, into the lower Reppisch. The Wüeribach is the longest and biggest tributary of the Reppisch and has an average flow rate of 310 L/s.