Water Level Management and Flood Risk
IDBs have an important role in reducing flood risk through management of water levels and drainage in their districts. The water level management activities of internal drainage boards cover 1.2 million hectares of England which represents 9.7% of the total land area. Reducing the flood risk to ~600,000 people who live or work, and ~879,000 properties located in IDB districts. Whilst many thousands of people outside of these boundaries also derive reduced flood risk from IDB water level management activities. Several forms of critical infrastructure fall within IDB districts including; 56 major power stations (28%) are located within an Internal Drainage District, 68 other major industrial premises and 208 km of motorway. In fact a recent publication by the Association of Drainage Authorities identified that 53% of the installed capacity (potential maximum power output) of major power stations in England and Wales are located within an IDB.
Although of much reduced significance since the 1980s, many IDB districts in Yorkshire and Nottinghamshire lie in areas of coal reserves and drainage has been significantly affected by subsidence from mining. IDBs have played an important role in monitoring and mitigating the effects of this activity and have worked in close collaboration with the coal companies and the Coal Authority.
Read more about this topic: Internal Drainage Board
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