Which group of colonies had the poorest system of river transportation?

Answer 1

If you are asking about the American colonies, the original thirteen states all seemed to have access to rivers, including the Hudson, the James, the Potomac, the Connecticut, and the Delaware Rivers, just to name a few. But if you are asking about other colonies, it becomes difficult to answer the question, since there were colonies all over the world, some of which were in land-locked countries, where there were few if any rivers.