Why is the Ping Yuen river in Hong Kong called River Ganges?
From the wikipedia:
Ping Yuen River (also known as River Ganges) (平原河) is a river in northern New Territories, Hong Kong. Its source lies near Cheung Shan in Ping Che. It flows along Ping Che Road and into the River Ganges Pumping Station near Chau Tin Village before emptying into Sham Chun River.
That is actually the whole article and there is not much information on why it is called Ganges. And although I cannot prove a negative, Frank Welsh doesn't write about it in A History of Hong Kong either.
My theory is that the river was named Ganges by early British/Indian settlers who either relocated from the Bengal province or compared it to the river in the Bengal province (perhaps to equalise themselves with that then more profitable province/trade route) that goes by the same name (River Ganga).
Edit: I should probably mention this. I have been to see this river and it is a natural waterway. In the colonial times it was used as a trade route with posts set up on its banks. No one (who showed me around) seems to know why it is called Ganges. Also, River Ganges was used as the longest trade route in India since late antiquity. Of course, I mention this fact to support my theory but I want to confirm my theory with the experts on this site (who may have alternate theories/more [interesting] information) --hence the question.