DOI: 10.5281/zenodo.17130778
title: ECMWF daily maximum volumetric soil moisture fraction under 0.2 - Kent (UK), 2022

description: Demonstration Case Name



Multi-hazards in the Southeast UK region





Dataset Title



ECMWF daily maximum volumetric soil moisture fraction under 0.2 - Kent (UK), 2022





Dataset Description



This dataset consists of:



ECMWF_Daily_VSoilL1max_Kent2022.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) for each date in 2022 for the wider Kent region in Southeast UK.

ECMWF_Daily_VSoilL1max_below_point2_binary_mask_Kent2022.tif: a multi-layer binary mask image where the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) is below the threshold of 0.2, indicative of drought conditions, for each date in 2022 for the wider Kent region in Southeast UK.

ECMWF_Daily_VSoilL1max_below_point2_mask_applied_Kent2022_1km.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) values after application of the binary mask for each date in 2022 for the wider Kent region in Southeast UK.


Data was generated using code developed within the Google Earth Engine online platform and output in GeoTIFF for interoperability and comparative analysis within GIS.





Key Methodologies



Calculation where pixels are under a threshold of 0.2 for each date in the 2022 daily maximum volumetric soil moisture fraction in layer 1 variable (volumetric_soil_moisture_layer_1_max) multi-date image stack, coded in Google Earth Engine online platform. Output in raster format.





Temporal Domain



Daily: 1st January 2022 to 31st December 2022.





Spatial Domain



Geographic extent covering the region of Kent, Southeast UK.

Projected Coordinate System: British National Grid (EPSG:27700)

Spatial Extent Bounding Box: Upper Left (182000N, 509000E), Lower Right (95000N, 641000E)

Spatial Resolution: 1km x 1km (resampled from original 11km data in GEE)





Key Indicators



Daily binary image stack indicating where pixels fail to reach the volumetric soil moisture threshold of 0.2, threshold indicative of drought conditions.





Data Format



GeoTIFF (*.tif)





Source Data



Primary source: ECMWF Climate Reanalysis ERA5-Land Daily Aggregated dataset (variable: ‘volumetric_soil_moisture_layer_1_max), accessed through the Google Earth Engine online platform (GEE) made available to by the Copernicus Climate Data Store (https://cds.climate.copernicus.eu/) under CC-BY-4.0 licence (https://creativecommons.org/licenses/by/4.0/).





Accessibility



10.5281/zenodo.17130778





Stakeholder Relevance



Urban planning departmentsEmergency response organizationsInfrastructure development teamsDisaster risk assessment analysts





Limitations/Assumptions



Original spatial resolution of data 11km (as available in GEE).





Additional Information



Technical specifications: GeoTIFF format requires use of a multi-band image visualisation package

Binary pixel values: 0 representing above threshold, 1 representing beneath threshold

Non binary mask images: pixel values respresent the ECMWF Daily Maximum Volumetric Soil Moisture in Layer 1 (0-7cm) as a fraction within that pixel.





Contact Information



kmcm@bgs.ac.uk