This map shows the appoximate outline of the catchment area which feeds into the measuring station at Craig y Nos. All the rain which falls onto the blue area, that is not absorbed into the soil or evaporated, will eventually flow to the sea via Craig y Nos.
This local monitoring station catchment area is contained within the Tawe to Cadoxton management catchment area.
Acknowledgement: Data from the UK National River Flow Archive. Used under the terms of the NRFA Data Licence.