▁situation ▁in ▁the ▁Gor in ▁River ▁poll ution ▁of ▁industrial ▁and ▁storm water ▁from ▁the ▁chemical ▁association ▁" Az ot " ▁below ▁the ▁city ▁of ▁Riv ne ▁and ▁dis charg es ▁of ▁se w age ▁from ▁the ▁Or zh iv ▁wood - processing ▁plant ▁below ▁the ▁mouth ▁of ▁the ▁U st ya ▁River . ▁In ▁general , ▁the ▁formation ▁of ▁the ▁quality ▁of ▁river ▁bas in ▁waters ▁is ▁determined ▁by ▁the ▁salt ▁background ▁( ch lor ides ), ▁nut ri ent - ph osph ate ▁comp ounds , ▁channel ▁er os ion , ▁to xic ▁imp ur ities ▁( co pper ). ▁ ▁According ▁to ▁the ▁complex ▁e colog ical ▁index , ▁the ▁river ▁in ▁the ▁mouth ▁part ▁can ▁be ▁attributed ▁to ▁the ▁class ▁of ▁moder ately ▁poll uted ▁rivers ▁and ▁trans itional ▁to ▁the ▁cont amin ated . ▁ ▁The ▁quality ▁of ▁river ▁waters ▁w ors en ▁periodic ▁dis charg es ▁( emer gency ) ▁of ▁se w age ▁from ▁sugar ▁fact ories ▁( O st roz ky , ▁Bab ino - Tom ah ov sky , ▁M iz ot sky ). ▁ ▁H ydro log y ▁The ▁H ory n ▁hill ▁in ▁the ▁upper ▁part ▁of ▁the ▁current ▁is ▁moder ately ▁v ort icular , ▁in ▁the ▁middle ▁and ▁lower , ▁it ▁is ▁strongly ▁w inding ▁( the ▁radius ▁of ▁curv ature ▁of ▁the ▁g entes ▁in ▁places ▁reaches ▁ 2 0 – 4 0 ▁m ), ▁mostly ▁un branch ed . ▁The ▁width ▁of ▁the ▁river ▁to ▁the ▁mouth ▁of