The Wetland Heritage of the Humberhead Levels - Tapa blanda

The Wetland Heritage of the Humberhead Levels

Librería:

CHARLES BOSSOM
(Ely, CAMBS, Reino Unido)

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Descripción Hard Cover. Condición: Very Good. Estado de la sobrecubierta: No DJ. Photographs, Maps, Plans & Diagrams Ilustrador. Illustrated boards. Slightly bumped and rubbed to edges. No ownership inscription. 508 pages clean and tight. The Humberhead Levels comprise three different types of wetland, undoubtedly the best known of which are the raised mires of Thorne and Hatfield Moors, which together measure approximately 3300 ha. Despite their status as Sites of Special Scientific Interest (SSSI), and the recent declaration of Thorne Moors as a National Nature Reserve (NNR), they suffer from severe desiccation as a result of drainage, while the ongoing peat extraction over much of the Moors is continuing to damage the palaeoenvironmental resource provided by the peat and the archaeological remains contained within it. The second type of wetland lies to the north and east of Thorne Moors and is known as Marshland. This comprises approximately 6000 ha and has been created and dominated by estuarine accretion in the past. The accumulation of sediment in this area continued well into the present century, a process encouraged by landowners to improve the quality of their land and commonly referred to as 'warping'. Despite the burial of prehistoric and historic landscapes beneath such sediments, the intensive character of agriculture in the area is likely to threaten the potential archaeological resource in the near future. The third type of wetland comprises the river floodplains of the Aire, Went, Don, Torne and Idle, and their tributaries such as the Hampole Beck. Although their individual histories and impact on the landscape vary greatly, due to the rise in sea-level during the last 10,000 years, all the rivers experienced an initial phase of incision when sea-level was more than 20 m below its present position, followed by a phase of aggradation, with the accumulation of alluvium and peat, and overbank flooding resulting in large-scale peat development in the area south and east of Thorne and Hatfield Moors. River management, starting with the ambitious drainage schemes of Cornelius Vermuyden in the 1620s and continuing up to the present time, combined with field drainage and modern farming techniques, has already destroyed much of the archaeological resource in this type of wetland and continues to threaten much of what remains. Fieldwork in the Humberhead Levels has involved three main elements - the archaeological field survey itself, palaeoenvironmental work and the assessment of the state of preservation of a limited number of archaeological sites. Size: 4to. Nº de ref. del artículo: 121286

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