20250110
12153200
1.0
FALSE
002
FRM_FH_SURFACE_WATER_EXTENT_L
54502.000000
469380.000000
530264.000000
1218540.000000
1
Projected
GCS_OSGB_1936
Linear Unit: Meter (1.000000)
British_National_Grid
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150000000
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20250124
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20250124
15582400
INSPIRE
dataset
Scottish Environment Protection Agency
foi@sepa.org.uk
Angus Smith Building, Unit 6, 4 Parklands Avenue, Eurocentral
Holytown
ML1 4WQ
GB
03000 99 66 99
9am - 5pm
Scottish Environment Protection Agency
Scottish Environment Protection Agency
20250225
File Geodatabase
10
https://www.sepa.org.uk/environment/environmental-data/
Esri ArcGIS 13.2.4.49743
SEPA Surface Water & Small Watercourses Flood Map v3.0
Surface Water & Small Watercourses Flood Extent Map for Scotland - Low Probability
2025-02-25T00:00:00
2025-02-25T00:00:00
0000
These maps have been produced to meet SEPA’s duty to publish flood hazard maps as set out in the Flood Risk Management (Scotland) Act 2009. The maps show where there is a risk of flooding from rivers, the sea and surface water.
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>The following probabilities are available for surface water & small watercourse flooding: High - 10 year return period, Medium - 200 year return period, Low - 1000 year return period, and the 200 year return period plus climate change using rainfall uplifts for 2070 from the FUTURE-DRAINAGE project. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>The FUTURE-DRAINAGE project is based on analysis of the UK Climate Projections 2018 (UKCP18) high resolution (UKCP Local) projections for Representative Concentration Pathway 8.5 (RCP8.5). The climate scenario has been defined by the 50th percentile for 2070. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>The surface water and small watercourses hazard maps show (where available): Flood extent, flood depth and flood velocities (where appropriate). </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P></DIV></DIV></DIV>
©SEPA 2025; this SEPA product is licensed under the Open Government Licence version 3.0
1
-8.335819
-0.723290
60.850295
54.549221
GEMET - INSPIRE themes, version 1.0
2008-06-01T00:00:00
http://www.eionet.europa.eu/gemet/inspire_themes
Natural risk zones
SEPA
surface water and small watercourses flood map
flooding
Scottish Environment Protection Agency
foi@sepa.org.uk
Angus Smith Building, Unit 6, 4 Parklands Avenue, Eurocentral
Holytown
ML1 4WQ
GB
03000 99 66 99
9am - 5pm
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
foi@sepa.org.uk
Angus Smith Building, Unit 6, 4 Parklands Avenue, Eurocentral
Holytown
ML1 4WQ
GB
03000 99 66 99
9am - 5pm
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN>Any use of these products must fully acknowledge the sources of the data. ©SEPA 202</SPAN><SPAN>5</SPAN><SPAN>; this SEPA product is licensed under the </SPAN><A href="http://www.nationalarchives.gov.uk:80/doc/open-government-licence/version/3/" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>Open Government Licence version 3.0</SPAN></SPAN></A><SPAN>.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Copyright and attribution information is available</SPAN><SPAN> on</SPAN><SPAN> </SPAN><A href="https://www.sepa.org.uk:443/environment/environmental-data/" STYLE="text-decoration:underline;"><SPAN>SEPA's Data Publication webpage</SPAN></A><SPAN>. </SPAN></P></DIV></DIV></DIV>
Scottish Environment Protection Agency
foi@sepa.org.uk
Angus Smith Building, Unit 6, 4 Parklands Avenue, Eurocentral
Holytown
ML1 4WQ
GB
03000 99 66 99
9am - 5pm
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
Scottish Environment Protection Agency
The Surface Water and Small Watercourse flood maps were developed at a 2m spatial resolution using the results from two-dimensional (2D) flood modelling method applied nationally across Scotland. The small watercourses modelled are those with a catchment area of <10km2. Rainfall inputs are based on UK Centre for Ecology & Hydrology’s Flood Estimation Handbook Depth-Duration-Frequency model, FEH22 for the summer season. Adjustments were made to the rainfall data to account for losses; infiltration in pervious areas and drainage losses in impervious areas. For pervious areas, the rural Revitalised Flood Hydrograph (ReFH) v2.3 loss model was used, whereas a modified ReFH v2.3 urban loss model was applied to impervious areas. A drainage rate of 15mm/hr was also applied to account losses to the drainage system in impervious areas The climate change scenario used mean rainfall uplifts for each river basin region calculated from the FUTURE-DRAINAGE project uplifts for the 100 year return period central estimate (50th percentile) for 2070. The FUTURE-DRAINAGE project is based on analysis of the UK Climate Projections 2018 (UKCP18) high resolution (UKCP Local) projections for Representative Concentration Pathway 8.5 (RCP 8.5). For catchments greater than 10km2 the fluvial influence from major watercourses and large waterbodies was removed via a drainage sump applying during hydraulic model simulations. The underlying ground model is made up of a national-scale composite Digital Terrain Model (DTM) consisting of Light Detection and Ranging (LiDAR) and photogrammetry data. Buildings are explicitly represented into the DTM as a flat 0.3m upstands from the natural ground level. Surface roughness and permeability are based on land use classifications derived from Ordnance Survey MasterMap.
COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
2010-12-08T00:00:00
Internal check carried out
1
10588666
EPSG
6.3(3.0.1)
FRM_FH_SURFACE_WATER_EXTENT_L
Feature Class
10588666
Polygon
ESRI
geom
SHAPE
Geometry
0
0
0
Feature geometry.
Esri.
Coordinates defining the features.
fid
fid
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
MAP_TYPE
MAP_TYPE
String
65536
0
0
Type of Mapping
SEPA
Text
SOURCE
SOURCE
String
65536
0
0
Source of Flooding
SEPA
Text
METRIC
METRIC
String
65536
0
0
Metric of flooding within the dataset
SEPA
Text
PROB
PROB
String
65536
0
0
Probability of flooding
SEPA
Text
BAND_DESC
BAND_DESC
String
65536
0
0
Description of the Metric of flooding
SEPA
Text
GRIDCODE
GRIDCODE
Double
8
0
0
Numeric code to describe the metric of flooding
SEPA
Value
SCENARIO
SCENARIO
String
65536
0
0
Description of the climate scenario type
SEPA
Text
CCGRIDCODE
CCGRIDCODE
Double
8
0
0
Numeric code to describe the climate scenario type
SEPA
Value
REFERENCE
REFERENCE
String
65536
0
0
Spatial geographic area reference. Hydrometric Area for surface water datasets and location of data not available for climate change datasets.
SEPA.
Text.
VERSION
VERSION
String
65536
0
0
Version number of flood map
SEPA
Text
ISSUE_DATE
ISSUE_DATE
Date
8
0
0
Publication date
SEPA
Date
geom_Length
SHAPE_LENGTH
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
geom_Area
SHAPE_AREA
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
Simple
FALSE
10588666
TRUE
FALSE