2 4 0   km , ▁which ▁ent ails ▁high ▁invest ment ▁costs ▁to ▁further ▁expand ▁the ▁capacity ▁of ▁the ▁existing ▁pipeline . ▁The ▁additional ▁volume ▁of ▁water ▁that ▁would ▁be ▁abstract ed ▁from ▁the ▁Sen eg al ▁River ▁is ▁expected ▁to ▁gradually ▁increase ▁from ▁ 0 . 5 ▁m ³ / s ▁to ▁about ▁ 6 . 0 ▁m ³ / s ▁in ▁ 2 0 3 0 . ▁The ▁required ▁needs ▁are ▁well ▁within ▁Sen eg al ' s ▁water ▁rights ▁under ▁the ▁agre ements ▁with ▁neighbor ing ▁countries . ▁However , ▁abstra ction ▁of ▁such ▁large ▁quantities ▁of ▁water ▁would ▁have ▁a ▁significant ▁environmental ▁impact ▁on ▁the ▁Lake ▁G ui ers ▁and ▁the ▁Sen eg al ▁River ▁D elta . ▁Furthermore , ▁future ▁low - flow ▁situations ▁of ▁the ▁Sen eg al ▁River ▁are ▁difficult ▁to ▁predict ▁in ▁the ▁light ▁of ▁climate ▁change ▁and ▁un cert aint ies ▁about ▁the ▁operations ▁of ▁the ▁Man ant ali ▁Dam . ▁ ▁Most ▁of ▁the ▁waste water ▁of ▁Dak ar ▁is ▁dis charg ed ▁without ▁treatment ▁into ▁the ▁Atlantic ▁Ocean . ▁Camb ér ène ▁waste water ▁treatment ▁plant , ▁the ▁largest ▁facility ▁in ▁operation ▁in ▁the ▁country , ▁tre ats ▁about ▁ 1 5 ▁percent ▁of ▁the ▁waste water ▁generated ▁in ▁Dak ar . ▁Since ▁ 2 0 0 7 ▁the ▁station ▁is ▁being ▁operated ▁and ▁expanded ▁by ▁the ▁French ▁company ▁SA UR . ▁Some ▁of ▁the ▁treated ▁waste water ▁is ▁being ▁re used . ▁As ▁of ▁ 2 0 0 7 ,