The Dee RBD is home to over 500,000 people and covers an area of 2,251 sq km of North East Wales, Cheshire, Shropshire and the Wirral. Chester and Wrexham are the two major urban centres, but the dominant land uses are agriculture and forestry, particularly in the upper areas. The RBD consists of a single river catchment; the River Dee, its tributaries and estuary. This relatively small area has a hugely varied landscape, ranging from the mountains and lakes of the Snowdonia in the headwaters, through the Vale of Llangollen in the middle reaches, to the open plains of Cheshire and the mudflats of the Dee Estuary lower down. The River Dee and Llyn Tegid are designated as a Special Area of Conservation (SAC) under the Habitats Directive while the Dee estuary is a Special Protection Area (SPA) and an SAC.