Ottava (Ottawa), daryoest dar janubi sharqi Kanada, shokhobi chapi daryoi Hazrati Lavrentiy. Sargahash dar balandni Lavrentiy. Tulash 1120 kilometr, masohati havzaash 115 hazor kilometr2. Aa chandin kulho meguzarad, jo-jo ostonaho dorad. Sarfi ob dar poyon obash ba khisobi miyona qarib 2000 metra/soniya.
Dekabr yakh basta, aprel yakhash ob meshavad. Az rezishgoh to sharsharai Shoder kishtigard ast. Dar Ottava GES- ho sokhta shudaand. Tavassuti kanali kishtigardi Rido bo kuli Ontario payvast ast. Dar sohili daryo shahri Ottava voqe gashtaast. Dar rezishgohash yakchand jazira dorad.