the length of the river is 327 km, the area of the pool is 7030 km². the trapezoidal valley is terraced, 2.5-3 km wide (up to 4-6 km), the flood plain is double-sided, waterlogged, on some areas drained; overwhelming width 0,4-0,5 km; there are elders generous winding, 15-20 m wide (in the upper reaches), up to 20-40 m (at the bottom), depth of 0.3-1.5 m (sometimes up to 4.5 m). the slope of the river is 0.2 m / km. power mixed, with predominance of snow. freezes in the end of november - in early december, it crashes in the second half of march. the average long-term water consumption of udayu (pryluky municipality) is 4.3 m³ / s. the mineralization of water varies during the year: spring flood - 729 mg / dm³; summer-autumn measurements - 807 mg / dm³; winter meadow - 853 mg / dm³. water is used for technical and household needs, for water supply, for irrigation.