trough, gutter, branch (of a river), small island; whistle

the Parana River

dam, dyke, jetty; trees and brush carried down a river; towing, tugging

to be covered in waves, to be choppy; to lap, splash, beat against (river, water, etc.)

sea, river, lake

opening (in an irrigation canal)

canal, channal (geography), tract (anatomy)

underground irrigation canal

Kahriz, underground irrigation canal

canal

small stream, brook, shallow gully

ravine, brook, creek, gully, wash; race ??

river, small stream, brook

brook, rivulet, small irrigation

brook, small stream, ravine, hollow; moaning, wailing