Hi hellmap, from what I've read from osm a river is considered a body of water that cannot be jumped across by an adult man (around 3m) this stream/river is around 4-5m wide and cannot be jumped across. This stream/river appears on pre soviet era maps (meaning pre flooding of lands next to the Daugava river due to the hes) showing it's Natural course flowing into the Daugava river, i also believe this river/stream is natural due to it's early appearance on maps and it's course appearing natural and the large number of tributerys, there are also other nearby rivers witch have the same property's such as Bļuķupe witch os a river with close to the same water level and same destination yet is still considered a river. 

let me know what you think of this, 
Thanks
