Identifying Sites for Flood Protection
159
Map section 4 Grid square 4a
A 0.3 metre flood would create losses that were primarily confined to sites of
ecological value. The Erskine salting would be permanently waterlogged thus
eliminating the current range of plant and animal communities. Two modern
commercial development, a large hotel and the Scottish headquarters of the
Automobile Association are located on a former river terrace and would suffer some
preliminary flood related problems especially an increased possibility of dampness in
basements, resulting in increased maintenance costs.
The 0.6 metre flood scenario produces little additional flood problem over the
0.3 metre situation. Dampness to foundations of buildings is likely to increase.
Flooding of 1.0 metre would cause problems for both the hotel and the AA
headquarters mentioned above. Access roads would be breached. Forfeiting of land
becomes a likely option.
Map section 5 Grid squares 5a, 5b
A 0.3 metre flood would cause considerable loss of agricultural land. In addition the
loss of two areas of high conservation value would occur - Newshot Island and
Newshot inlet. The latter is a salting of considerable ecological value and exhibits a
large variety of plant and animal communities. Loss to property would be minimal,
although it is possible that a combination of a strong westerly wind and high tide could
result in water being driven further inland towards new private residential properties.
The 0.6 and 1.0 metre flood scenario would produce only a small increase in
the total amount of flooded land. However, this would extend to the private residential
property mentioned above. Some agricultural land could be forfeited to the sea.
Map section 6 Grid squares 6a, 6b, 6c, 6d
A flood of 0.3 m. would result in considerable loss of class 3.i agricultural land and
would also threaten a modern sewage treatment site and a length of class A-road. , A
part of the Renfrew Golf Course would be jeopardised alongside the east bank of the
River White Cart
A progressive increase in flood level to 0.6 and 1.0 metres results in loss of
grade 2 agricultural land and an area of horticultural land. Substantial land forfeiting
would be necessary.
Conclusion
Application of the methodology described in this chapter has shown that the 0.3 metre
flood scenario has shown a substantial proportion of land adjacent to the Clyde estuary
as vulnerable to flooding. The direct cost of providing adequate flood protection for the
0.3 metre flood along the entire 15 km section of estuary studied in this chapter would
amount to approximately £30 million at 1989 prices. It is suggested that this figure is
an under-estimate of the real cost as it takes no account of the inland disruption caused
by flooding. By calculating the landuse areas as opposed to linear distance that would
159
Map section 4 Grid square 4a
A 0.3 metre flood would create losses that were primarily confined to sites of
ecological value. The Erskine salting would be permanently waterlogged thus
eliminating the current range of plant and animal communities. Two modern
commercial development, a large hotel and the Scottish headquarters of the
Automobile Association are located on a former river terrace and would suffer some
preliminary flood related problems especially an increased possibility of dampness in
basements, resulting in increased maintenance costs.
The 0.6 metre flood scenario produces little additional flood problem over the
0.3 metre situation. Dampness to foundations of buildings is likely to increase.
Flooding of 1.0 metre would cause problems for both the hotel and the AA
headquarters mentioned above. Access roads would be breached. Forfeiting of land
becomes a likely option.
Map section 5 Grid squares 5a, 5b
A 0.3 metre flood would cause considerable loss of agricultural land. In addition the
loss of two areas of high conservation value would occur - Newshot Island and
Newshot inlet. The latter is a salting of considerable ecological value and exhibits a
large variety of plant and animal communities. Loss to property would be minimal,
although it is possible that a combination of a strong westerly wind and high tide could
result in water being driven further inland towards new private residential properties.
The 0.6 and 1.0 metre flood scenario would produce only a small increase in
the total amount of flooded land. However, this would extend to the private residential
property mentioned above. Some agricultural land could be forfeited to the sea.
Map section 6 Grid squares 6a, 6b, 6c, 6d
A flood of 0.3 m. would result in considerable loss of class 3.i agricultural land and
would also threaten a modern sewage treatment site and a length of class A-road. , A
part of the Renfrew Golf Course would be jeopardised alongside the east bank of the
River White Cart
A progressive increase in flood level to 0.6 and 1.0 metres results in loss of
grade 2 agricultural land and an area of horticultural land. Substantial land forfeiting
would be necessary.
Conclusion
Application of the methodology described in this chapter has shown that the 0.3 metre
flood scenario has shown a substantial proportion of land adjacent to the Clyde estuary
as vulnerable to flooding. The direct cost of providing adequate flood protection for the
0.3 metre flood along the entire 15 km section of estuary studied in this chapter would
amount to approximately £30 million at 1989 prices. It is suggested that this figure is
an under-estimate of the real cost as it takes no account of the inland disruption caused
by flooding. By calculating the landuse areas as opposed to linear distance that would