Available Water Capacity, Scotland WMS

Published by:
Scottish Government SpatialData.gov.scot
Last updated:
21 July 2021
Topic:
Not added
Licence:
Other Licence
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Summary

The proportion of water held in the soil at field capacity (5KPa) and at the permanent wilting point (1500kPa) was calculated for each soil horizon of each soil taxonomic unit (soil series) delineated within the 1:250 000 national soil map of Scotland based on pedotransfer functions (regression equations using median sand, silt, clay and organic carbon contents from the Scottish soils knowledge and information base (SSKIB) derived for soils in the UK (Hollis et al., 2015). The Available Water Content for each horizon was calculated by subtracting the water content at 1500 KPa from the water content at 5 kPa. The horizon thickness was then multiplied by the available water content (mm) and summed for the entire soil profile to 1 m or rock if <1m. The map shows the average available water capacity calculated using the areal proportions of all soils in each 1:250 000 soil map unit.

Gagkas, Z., Lilly, A., Baggaley, N. & Donnelly, D. (2019). Map of available water capacity of soils in Scotland. James Hutton Institute. Aberdeen.

Please note that this dataset differs significantly to the version of Available Water Capacity published in 2012. The difference results from the use of different regression equations to predict available water capacities (Hollis et al.) and bulk densities. In addition, the data values shown are weighted averages by polygon rather than the AWC of the dominant soil type in the polygon. The earlier version of AWC was published as Lilly, A, Baggaley, N and Donnelly, D. 2012. Map of available water content to 1 metre depth in soils of Scotland. Map prepared for EU project GS-SOIL-Assessment and strategic development of INSPIRE compliant Geodata-Services for European Soil Data. ECP-2008-GEO-318004.

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Link to the data Format File added Data preview
Zipped ESRI shapefile ZIP 21 July 2021 Not available
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Additional information

View additional metadata
Added to data.gov.uk
2021-07-19
Access contraints
no limitations on public access
Harvest GUID
71e38c05-cf6c-4732-b966-7c202e146cc4
Extent
Latitude: 60.87° to 54.63°
Longitude: -8.80° to -0.71°
Spatial reference system
OSGB 1936 / British National Grid (EPSG:27700)
Dataset reference date
2019-03-27 (publication)
Frequency of update
irregular
Responsible party
The James Hutton Institute (custodian, principalInvestigator)
ISO 19139 resource type
service
Metadata language
eng
Source Metadata
XML
HTML

Contact

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Scottish Government SpatialData.gov.scot

Licence information

The James Hutton Institute Open Data Licence