158
G. Jones
cause flooding of domestic property in the village of Langbank. Unless remedial action
had been taken at an earlier point in time, flooding of road and rail links would also
occur. A section of agricultural land could be sacrificed to sea.
Map section 2 Grid squares 2a, 2b, 2c
A flood of 0.3 metres above current protection levels would result in flooding of the
coastal margins of this section of the estuary and would result in substantial disruption
to communication links thus bringing the problem of sea level rise to the direct
attention of a large sector of the population using road and rail links. The motorway is
particularly vulnerable to flooding over a 0.5 km section and currently has only
minimal protection from inundation. In addition, the railway between Glasgow and
Gourock follows the narrow coastal strip and disruption to rail traffic could be
anticipated. The railway connects Glasgow to termini both at Gourock and Wemyss
Bay, each of which serve ferry terminals operating to outlying areas. Disruption of
transport links would thus have repercussions for travellers over a wide area. In the
eastern section of this grid square an earth embankment has already been constructed
by the landowner in an attempt to protect agricultural land. This embankment provides
protection to a flood height of 5.0 metres above mean high water spring tides. A water
level some 30 centimetres above 5.0 metres would allow water to overtop the
embankment, and if this occurred, would become trapped behind the bank thus
illustrating a specific problem of coastal flood protection. If the protective structure
becomes overtopped by flood water, the protection mechanism may then become on
obstacle to the easy and rapid removal of flood water. Provision of sluice gates and
pumps would be required to drain the land.
A rise in flood level to 0.6 metres would cause inundation to agricultural land
and a golf course. Further flooding to 1.0 metre would endanger a short section of class
A-road and a substantial area of grade 3.i agricultural land. Based on the criteria used
in Table 1 the least cost option would be to forfeit the agricultural land to the sea.
Map section 3 Grid squares 3a, 3b, 3c
A flood of 0.3 metre would inundate an area of land of varying width, including a
section of the Erskine Golf Course. Construction of a low concrete embankment has
already been made, the purpose of which appears mainly to prevent erosion of land. It
would provide minimal defence against flooding. A potentially serious problem could
occur at grid reference 4605 7230 where the Erskine Road Bridge crosses the estuary.
The rise in sea level could result in inundation of the foundations to the bridge
supports, leading to long term damage to the concrete foundations. Up stream of the
road bridge, Longhaugh Point and its associated embayment is currently a highly
valued bird habitat. A rise in sea level of 0.3 metres would result in changes to the
feeding and roosting areas.
The impact of 0.6 and 1.0 metre floods would be to inundate an additional
area of valuable fairway and greens of the Erskine Golf Course. Areas of agricultural
land could be lost to semi-permanent flooding.
G. Jones
cause flooding of domestic property in the village of Langbank. Unless remedial action
had been taken at an earlier point in time, flooding of road and rail links would also
occur. A section of agricultural land could be sacrificed to sea.
Map section 2 Grid squares 2a, 2b, 2c
A flood of 0.3 metres above current protection levels would result in flooding of the
coastal margins of this section of the estuary and would result in substantial disruption
to communication links thus bringing the problem of sea level rise to the direct
attention of a large sector of the population using road and rail links. The motorway is
particularly vulnerable to flooding over a 0.5 km section and currently has only
minimal protection from inundation. In addition, the railway between Glasgow and
Gourock follows the narrow coastal strip and disruption to rail traffic could be
anticipated. The railway connects Glasgow to termini both at Gourock and Wemyss
Bay, each of which serve ferry terminals operating to outlying areas. Disruption of
transport links would thus have repercussions for travellers over a wide area. In the
eastern section of this grid square an earth embankment has already been constructed
by the landowner in an attempt to protect agricultural land. This embankment provides
protection to a flood height of 5.0 metres above mean high water spring tides. A water
level some 30 centimetres above 5.0 metres would allow water to overtop the
embankment, and if this occurred, would become trapped behind the bank thus
illustrating a specific problem of coastal flood protection. If the protective structure
becomes overtopped by flood water, the protection mechanism may then become on
obstacle to the easy and rapid removal of flood water. Provision of sluice gates and
pumps would be required to drain the land.
A rise in flood level to 0.6 metres would cause inundation to agricultural land
and a golf course. Further flooding to 1.0 metre would endanger a short section of class
A-road and a substantial area of grade 3.i agricultural land. Based on the criteria used
in Table 1 the least cost option would be to forfeit the agricultural land to the sea.
Map section 3 Grid squares 3a, 3b, 3c
A flood of 0.3 metre would inundate an area of land of varying width, including a
section of the Erskine Golf Course. Construction of a low concrete embankment has
already been made, the purpose of which appears mainly to prevent erosion of land. It
would provide minimal defence against flooding. A potentially serious problem could
occur at grid reference 4605 7230 where the Erskine Road Bridge crosses the estuary.
The rise in sea level could result in inundation of the foundations to the bridge
supports, leading to long term damage to the concrete foundations. Up stream of the
road bridge, Longhaugh Point and its associated embayment is currently a highly
valued bird habitat. A rise in sea level of 0.3 metres would result in changes to the
feeding and roosting areas.
The impact of 0.6 and 1.0 metre floods would be to inundate an additional
area of valuable fairway and greens of the Erskine Golf Course. Areas of agricultural
land could be lost to semi-permanent flooding.