▁the ▁Pol k va ▁River ▁is ▁ 3 – 1 0 ▁m , ▁below ▁- ▁ 2 5 – 6 0 ▁m , ▁the ▁largest ▁- ▁ 1 9 ▁m ▁( the ▁out sk ir ts ▁of ▁the ▁village ▁of ▁Vor ona ), ▁the ▁smallest ▁- ▁ 0 , 5 ▁m ▁( v ill age ▁M ala ▁G ory anka ). ▁Dep th s ▁are ▁distributed ▁une ven ly ; ▁on ▁the ▁pla ins ▁ 1 , 4 - 2 , 5 ▁m , ▁in ▁places ▁up ▁to ▁ 5 – 1 1 ▁m , ▁on ▁roll s ▁down ▁to ▁ 0 , 3 – 1 ▁m . ▁The ▁veloc ities ▁of ▁the ▁flow ▁on ▁the ▁valle ys ▁are ▁ins ign ific ant ▁( 0 , 1 - 0 , 3 ▁m ▁/ ▁s ), ▁on ▁rocks ▁are ▁increasing ▁to ▁ 0 . 5 - 1 . 3 ▁m ▁/ ▁s . ▁ ▁The ▁river ▁H ory n ▁bas in ▁on ▁the ▁hydro graph ic ▁map ▁of ▁Ukraine ▁The ▁bed ▁is ▁slightly ▁over g rown ▁with ▁re eds , ▁sed ges ▁and ▁alg ae , ▁mostly ▁off sh ore , ▁with ▁a ▁strip ▁of ▁ 3 – 5 ▁m ; ▁in ▁the ▁lower ▁reaches , ▁l itter ed ▁with ▁sun ken ▁logs , ▁ra gs ▁and ▁trees ▁that ▁fell ▁from ▁the ▁sh ores . ▁ ▁The ▁bottom ▁is ▁mostly ▁sand y , ▁on ▁roll s ▁sometimes ▁covered ▁with ▁p eb bles , ▁on ▁the ▁pla ins ▁are ▁s ilt ed ; ▁in ▁the