sky ▁and ▁Riv ne ▁regions ). ▁Due ▁to ▁the ▁un sol ved ▁problem ▁of ▁technical ▁water ▁supply ▁from ▁the ▁Southern ▁Bug ▁River , ▁the ▁N PP ▁rel ieves ▁the ▁peak ▁flo od ▁values , ▁leaving ▁only ▁the ▁minimum ▁run off ▁in ▁the ▁channels ▁of ▁the ▁channel . ▁This ▁leads ▁to ▁the ▁development ▁of ▁channel ▁er os ion , ▁s ilt ation ▁of ▁winter ing ▁p its , ▁channel ing ▁channels . ▁As ▁a ▁result , ▁during ▁the ▁years ▁there ▁was ▁no ▁observed ▁flo od ▁in ▁the ▁upper ▁and ▁middle ▁flows , ▁there ▁is ▁no ▁energy ▁exchange ▁between ▁the ▁channel ▁and ▁the ▁flo od plain , ▁the ▁phen omena ▁of ▁st agn ation ▁have ▁developed . ▁From ▁the ▁aqu atic ▁e cos ystem , ▁a ▁group ▁of ▁macro phy tes ▁disapp ears , ▁first ▁of ▁all ▁rh est , ▁ai , ▁and ▁jug s . ▁ ▁The ▁second ▁of ▁these ▁problems ▁is ▁the ▁processes ▁of ▁extended ▁de pression ▁of ▁ground water ▁formed ▁in ▁the ▁C ret ace ous - Mar l ▁region ▁( the ▁G osh ch ansk - O st roz h sky ▁region ) ▁due ▁to ▁the ▁ground less ▁collection ▁of ▁under ground ▁water ▁for ▁drink ing ▁water ▁supply ▁in ▁the ▁city ▁of ▁Riv ne . ▁The ▁inten se ▁in fil tr ation ▁in ▁the ▁ground water ▁aqu if ers ▁of ▁the ▁surface ▁run off ▁enh ances ▁the ▁channel ing ▁of ▁the ▁channel ▁and ▁de grad ation ▁of ▁the ▁river ▁e cos ystem . ▁Supp lement s ▁the ▁formation ▁of ▁the ▁crisis