High-resolution global topographic index values
The topographic index is a hydrological quantity describing the propensity of the soil at landscape points to become saturated with water as a result of topographic position (i.e. not accounting for other factors such as climate that also affect soil moisture but are accounted for separately). Modern land surface models require a characterisation of the land surface hydrological regime and this parameter allows the use of the TOPMODEL hydrological model to achieve this .This Geographic Information System layer is intended for use as topographic ancillary files for the TOPMODEL routing model option within the Joint UK Land Environment Simulator (JULES) land surface model. The topographic index variable here is directly comparable to the compound topographic index available from United States Geological Survey's Hydro1K at 30 sec resolution. PLEASE NOTE: This dataset is a correction to a previous version which was found to contain errors (doi:10/t7d). In the previous version all pixels north of 4.57 degrees south were shifted consistently 9.3 km to the west. This version is correctly aligned at all points. Full details about this dataset can be found at https://doi.org/10.5285/6b0c4358-2bf3-4924-aa8f-793d468b92be
dataset
name: Download the data
description: Download a copy of this data
function: download
https://data-package.ceh.ac.uk/sd/6b0c4358-2bf3-4924-aa8f-793d468b92be.zip
name: Supporting information
description: Supporting information available to assist in re-use of this dataset
function: information
1425985863014
CEH:EIDC:
eng
environment
Hydrography
publication
2008-06-01
Topography
hydrology
soil moisture
inundation
spatial data
hydrological regimes
-180
180
86.1
-56.35
2014-01-01
publication
2015-03-03
notPlanned
The GA2 algorithm has been used to calculate these topographic index values, using base data layers provided by the HydroSHEDS suite of GIS layers. All files were generated using FORTRAN 90 at 15 arc-sec resolution (cells circa 450 m x 450 m at the Equator). PLEASE NOTE: This dataset is a correction to a previous version which was found to contain errors (doi:10/t7d). In the previous version all pixels north of 4.57 degrees south were shifted consistently 9.3 km to the west. This version is correctly aligned at all points.
publication
2010-12-08
netCDF
This product, High-resolution global topographic index values, has been created with use of data from the HydroSHEDS database which is © World Wildlife Fund, Inc. (2006-2013) and has been used herein under license. WWF has not evaluated the data as altered and incorporated within, High-resolution global topographic index values, and therefore gives no warranty regarding its accuracy, completeness, currency or suitability for any particular purpose. Portions of the HydroSHEDS database incorporate data which are the intellectual property rights of © USGS (2006-2008), NASA (2000-2005), ESRI (1992-1998), CIAT (2004-2006), UNEP-WCMC (1993), WWF (2004), Commonwealth of Australia (2007), and Her Royal Majesty and the British Crown and are used under license. The HydroSHEDS database and more information are available at http://www.hydrosheds.org
If you reuse this data, you should cite: Marthews, T.R., Dadson, S.J., Lehner, B., Abele, S., Gedney, N. (2015). High-resolution global topographic index values. NERC Environmental Information Data Centre https://doi.org/10.5285/6b0c4358-2bf3-4924-aa8f-793d468b92be
University of Oxford
author
University of Oxford
author
McGill University
author
University of Oxford
author
Hadley Centre for Climate Prediction and Research
author
NERC Environmental Information Data Centre
publisher
NERC EDS Environmental Information Data Centre
custodian
UK Centre for Ecology & Hydrology
pointOfContact
Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg
Lancaster
LA1 4AP
UK
pointOfContact
2023-02-09T11:08:54