Habitats and species of affect flow, frequency or principal importance duration of flooding to habitats. Soil, Geology and Geomorphology Floodplain gravels and alluvial Flood risk on soil quality, Soil erosion will continue due to deposits in the Taplow which could affect other SEA surface water flash flooding and gravel in the central area topics other causes around Paddington Basin and Geology can influence the Continued compaction and London Clay to the north extent and likelihood of an sealing through an increase in One historic landfill site at area to groundwater flooding developed Portugal Street near Holborn and/or the suitability of some surfaces and potential for other areas of of SUD options. Potential flood risk to contaminated land contaminated land or historic landfill Water Highly urbanised River Direct and indirect effects on Water quality and water Thames catchment with poor water resources, both surface resources may increasingly be water quality and ground water, which could affected by urban flooding, Three Groundwater Source affect their chemical which provides a potential ‘good’ Protection Zones (SPZ) and ecological status as pathway for pollution. Two water bodies in strategy required by the WFD. area Thames Middle Requirement for a preliminary – (estuarine, heavily modified) WFD Assessment (see - Part of the Grand Union Appendix D). Canal (artificial) Historic Environment Palace of Westminster and Potential to reduce flood risk Historic environment will Westminster World to archaeological assets continue to shape the character Heritage Site Potential for impacts on the of the borough Over 11,000 listed buildings, character of the historic Archaeological assets will 56 Conservation 21 landscape and archaeological continue to be threatened by listed historic parks and assets and setting development pressures, gardens, five Royal Parks, 85 inadequate management of London Squares, 2 Scheduled landscapes and inappropriate Monuments, 5 archaeological development. priority areas and strategic or Potential loss or damage to protected views. historically significant features, Non-designated sites and particularly non-statutory HER sites of national historic buildings from importance increasing flood risk and indirect Historic landscape impacts e.g. from changes in Unrecorded archaeological water table levels. potential around the Thames foreshore and river walls Townscape and Public Realm Settled, low scape townscape Measures to reduce flood risk Increasing urbanisation with relatively few buildings need to be sympathetic to the increasing pressure on the taller than six to eight storeys. character of the townscape skyline
Habitats and species of principal importance affect flow, frequency or duration of flooding to habitats. Soil, Geology and Geomorphology Floodplain gravels and alluvial deposits in the Taplow gravel in the central area around Paddington Basin and London Clay to the north One historic landfill site at Portugal Street near Holborn and potential for other areas of contaminated land Flood risk on soil quality, which could affect other SEA topics Geology can influence the extent and likelihood of an area to groundwater flooding and/or the suitability of some of SUD options. Soil erosion will continue due to surface water flash flooding and other causes Continued compaction and sealing through an increase in developed surfaces Potential flood risk to contaminated land or historic landfill Water Highly urbanised River Thames catchment with poor water quality Three Groundwater Source Protection Zones (SPZ) Two water bodies in strategy area – Thames Middle (estuarine, heavily modified) - Part of the Grand Union Canal (artificial) Direct and indirect effects on water resources, both surface and ground water, which could affect their ‘good’ chemical and ecological status as required by the WFD. Requirement for a preliminary WFD Assessment (see Appendix D). Water quality and water resources may increasingly be affected by urban flooding, which provides a potential pathway for pollution. Historic Environment Palace of Westminster and Westminster World Heritage Site Over 11,000 listed buildings, 56 Conservation 21 listed historic parks and gardens, five Royal Parks, 85 London Squares, 2 Scheduled Monuments, 5 archaeological priority areas and strategic or protected views. Non-designated sites and HER sites of national importance Historic landscape Unrecorded archaeological potential around the Thames foreshore and river walls Potential to reduce flood risk to archaeological assets Potential for impacts on the character of the historic landscape and archaeological assets and setting Historic environment will continue to shape the character of the borough Archaeological assets will continue to be threatened by development pressures, inadequate management of landscapes and inappropriate development. Potential loss or damage to historically significant features, particularly non-statutory historic buildings from increasing flood risk and indirect impacts e.g. from changes in water table levels. Townscape and Public Realm Settled, low scape townscape with relatively few buildings taller than six to eight storeys. Measures to reduce flood risk need to be sympathetic to the character of the townscape Increasing urbanisation increasing pressure on the skyline
appendix2_westminster_sea_er_draft_april_2015.docx