The start
The oxygen content of a river or stream is likely to be highest at the source. The source of the river or stream is where it originates.
The source
in stream valleys
headwaters
headwaters
The source
On the torso on the side closest to the radiation source. I.e. so that it is facing the radiation without part of your anatomy between it and the source.
There are several streams that run quite close to Tauranga CBD. For example the Waimapu Stream and Kopurererua Stream. Strictly speaking though, the closest RIVER is Wairoa River.
The "Gulf Stream".
It beagins from a spring or source
source
The Gulf stream