original: the valleys of the waimea river and its tributary , the makaweli river , were once heavily populated .
simplifications: the valleys of the waimea river and its small stream , the makaweli river , were once heavily populated . the valleys of the waimea river and its tributary , the makaweli river , once had lots of people living there . valleys of makaweli river and it 's distributary waimea river were densely populated in earlier times . the valleys of the waimea river and its tributary , the makaweli river , were once heavily populated . the valleys of the waimea river and its small stream , the makaweli river , were once heavily populated . the valleys of the waimea river and its parent river , makaweli , were once heavily populated . the valleys of the waimea river and its tributary , the makaweli river , were once hugely populated . the valleys of the waimea river and its tributary , the makaweli river , were once excessively populated .