WINS Natural Flood Management: Catchment Zones
Rheolaeth Naturiol o Lifogydd: Parthau Dalgylch

  • English
  • wel
  • All

This dataset was created for the Welsh Information for Nature Bases Solution or WINS project (previously known as SCCAN) to identify opportunities to carry out land management interventions to increase ecosystem service delivery in a number of key policy areas.


There is an accompanying User Guide to assist in the use of these datasets. A full list of datasets used and data limitations can be found in the project technical report.


What the map shows:

The map shows the area split into seven separate catchment zones, in which different types of NFM intervention can be used to achieve benefits.


The catchment zones are: floodplains in valley bottom areas; floodplains in the mid-reaches; gentle and steeply sloping mid-reaches; floodplains in the headwaters regions, as well as gently and steeply sloping headwater regions.

Identification

Dynodydd
Identifier
NRW_DS121672
Teitl Amgen
Alternative Title
  • SCCAN Natural Flood Management: Catchment Zones
Laith Metadata
Metadata Language
English
Lineage

How the map has been created:


For this map, the valley bottom floodplains have been defined as falling within flood zone 3 and having an elevation of less than 100m. The headwaters region has been defined as having an elevation of over 300m; the region is considered to be headwaters floodplain if the area also falls in flood zone 3; steep headwaters, if the slope is over 11°; and as gentle headwaters, if it is less than 11°. The area that is neither valley bottom nor head waters region forms the mid-reaches, with areas falling into flood zone 3 forming the mid-reaches floodplains and slope of 11° again forming the threshold between gentle and steep mid-reaches.


This dataset was produced for NRW under contract by Environment Systems Ltd.
Additional Information

Data gaps and limitations:

This dataset shows a rough approximation of catchment zones to help target NFM measures; through more detailed hydrological modelling, more detailed catchment zones could be derived.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2018-04-01

Temporal Extent

Begin date
2017-09-01
End date
2018-04-01
 
Categori pwnc
Topic category
  • Planning cadastre
    Planning cadastre
  • Society
    Society
  • Farming
    Farming
  • Biota
    Biota
  • Geoscientific information
    Geoscientific information
  • Climatology, meteorology, atmosphere
    Climatology, meteorology, atmosphere
  • Environment
    Environment
  • Elevation
    Elevation
  • Imagery base maps earth cover
    Imagery base maps earth cover
  • Inland waters
    Inland waters
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Environment Systems Ltd -
8G Vefn Llan Science Park, Aberystwyth, Ceredigion, SY23 3AH, Wales
http://www.envsys.co.uk/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Dosbarthiad
Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Geographic Information System ( Unknown )

    Specification

    ESRI Feature Class

Lleolwr Adnoddau
Resource Locator
View Data ( WWW:LINK-1.0-http--link )
 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
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
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

How the map has been created:


For this map, the valley bottom floodplains have been defined as falling within flood zone 3 and having an elevation of less than 100m. The headwaters region has been defined as having an elevation of over 300m; the region is considered to be headwaters floodplain if the area also falls in flood zone 3; steep headwaters, if the slope is over 11°; and as gentle headwaters, if it is less than 11°. The area that is neither valley bottom nor head waters region forms the mid-reaches, with areas falling into flood zone 3 forming the mid-reaches floodplains and slope of 11° again forming the threshold between gentle and steep mid-reaches.


This dataset was produced for NRW under contract by Environment Systems Ltd.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • Area Statement
  • SoNaRR
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

NRW SMNR Keywords
  • Ecosystem Services (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-26
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW. Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313231363732 XML
Laith Metadata
Metadata Language
English
Parent Identifier
WINS Area Statement Opportunity Maps

NRW_DS121668
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-10-13T09:18:34.756Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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