 Crouch catchment

Blackwater catchment

Colne catchment

Stour catchment

Orwell catchment

Minor coastal catchments

Yare catchment

Coastal catchments

Great Ouse catchment

All rivers discharging into The Wash and the North Sea between King's Lynn and Cleethorpes at the mouth of The Humber.Nene catchment

Welland catchment

The Haven catchment

Steeping catchment

Saltfleet catchment

Grainthorpe catchment

Tetney Haven catchment

This section includes all rivers entering the Humber, defined as the estuary west of a line between Spurn Head and Cleethorpes.The Humber is often referred to as the River Humber though the name is unusual insofar as it is an entirely tidal stretch of water formed as the Rivers Ouse and Trent combine at Trent Falls.