Koawa, n. Watercourse.
kōawaawa. 1. n. Narrow gully.
2. a. Fluted, grooved.
Williams Dictionary
E ai ki tā Pita, i nui te inanga i ēnei kōawa i mua.According to Pita, there used to be heaps of whitebait in these streams.According to... - E ai ki.../E ai ki tā... /Ki tā