The lake basin covers 3174 km², the lake has a length of 63.5 km, a minimum width of 20 km, an area of ​​670.3 km², a maximum depth of 103.8 m, a volume of 27.5 km³, a coastline of 235 km, altitude above sea level 85.6 m or 85 m. The average depth in the southern part of the lake is 4 m, in the northern part - 40 m.