River Arun Internal Drainage District

Internal drainage boards (IDB) are public bodies that manage water levels in some areas where there is a special need for drainage. These areas are known as internal drainage districts (IDD). The Environment Agency undertakes the responsibility of IDB for the River Arun IDD. Under the Land Drainage Act 1991, internal drainage districts are areas defined as deriving benefit or avoiding danger as a result of drainage operations. Each internal drainage board (IDB) is a local independent public body that manages water levels in the corresponding internal drainage district. IDBs undertake works to reducing flood risk to people and property, and manage water levels for agricultural needs and for the protection and enhancement of the environment within their district. IDBs are defined as a type of Risk Management Authority under the Flood & Water Management Act 2010. The River Arun Internal Drainage District dataset also forms part of the "Association of Drainage Authorities: Administrative Boundaries - Internal Drainage Districts in England" dataset. Whilst indicative, this data is the most comprehensive and consistent national dataset of internal drainage district boundaries in England.