River Derwent topographic map
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River Derwent
Rainfall and climate conditions vary slightly across the Derwent catchment area due to the topography. Annual rainfall ranges from averages of 600 millimetres (24 in) at Barmby Barrage to over 1,100 millimetres (43 in) at its source on the North York Moors.
About this map
Name: River Derwent topographic map, elevation, terrain.
Average elevation: 56 m
Minimum elevation: -1 m
Maximum elevation: 338 m
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Askham Bog Nature Reserve
United Kingdom > England > York > Askham Bryan
However, subsequent colonization by common reed, whose fossilized root fragments have been found immediately above the nekron mud layer, lead to a reduced extent of open water. In turn, a layer of fen peat gradually accumulated above the mud in the bog centre to begin forming a raised bog. The increased…
Average elevation: 16 m
