Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The river flows from the main body of the River Clwyd and then branches off North and goes towards Prestatyn. As this river forms a waterfall and goes through the village of Dyserth, it can be prone to flooding. An example was back in 2000.