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Earth System Science Data The Data Publishing Journal
https://doi.org/10.5194/essd-2017-66
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Review article
22 Aug 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).
Deriving a country-wide soils dataset from the Soil Landscapes of Canada (SLC) database for use in Soil and Water Assessment Tool (SWAT) Simulations
Marcos R. C. Cordeiro1, Glenn Lelyk2, Roland Kröbel1, Getahun Legesse3, Monireh Faramarzi4, M. Badrul Masud4, and Tim McAllister1 1Science and Technology Branch, Agriculture and Agri-Food Canada, Lethbridge, AB, T1J 4B1, Canada
2Science and Technology Branch, Agriculture and Agri-Food Canada, Winnipeg, MB, R3T 2N2, Canada
3Department of Animal Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
4Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, T6G 2E3, Canada
Abstract. The Soil and Water Assessment Tool (SWAT) model has been commonly used in Canada for hydrological and water quality simulations. However, pre-processing of critical data such as soils information can be laborious and time-consuming. The objective of this work was to pre-process the Soil Landscapes of Canada (SLC) database to offer a country-level soils dataset in a format ready to be used in SWAT simulations. A two-level screening process was used to identify critical information required by SWAT and to remove records with information that could not be calculated or estimated. Out of the 14,063 unique soils in the SLC, 11,838 soils with complete information were included in the dataset presented here. Important variables for SWAT simulations that are not reported in the SLC database [e.g. hydrologic soils groups (HSGs) and erodibility factor (K)] were calculated from information contained within the SLC database. These calculations, in fact, represent a major contribution to enabling the present dataset to be used for hydrological simulations in Canada using SWAT and other comparable models. Analysis of those variables indicated that 21.3 %, 24.6 %, 39.0 %, and 15.1 % of the soils in Canada belong to HSGs 1, 2, 3, and 4, respectively. This suggests that almost two-thirds of the soils have a high (i.e., HSG 4) or relatively high (i.e., HSG 3) runoff generation potential. A spatial analysis indicated that 20.0, 26.8, 36.7 and 16.5 % of soil belonged to HSG 1, HSG 2, HSG 3, and HSG 4, respectively. Erosion potential, which is inherently linked to the erodibility factor (K), was associated with runoff potential in important agricultural areas such as southern Ontario and Nova Scotia. However, contrary to initial expectations, low or moderate erosion potential was found in areas with high runoff potential, such as regions in southern Manitoba (e.g. Red River Valley) and British Columbia (e.g. Peace River watershed). This dataset will be a unique resource to a variety of research communities including hydrological, agricultural and water quality modellers and are publicly available at https://doi.org/10.1594/PANGAEA.877298a.

Citation: Cordeiro, M. R. C., Lelyk, G., Kröbel, R., Legesse, G., Faramarzi, M., Masud, M. B., and McAllister, T.: Deriving a country-wide soils dataset from the Soil Landscapes of Canada (SLC) database for use in Soil and Water Assessment Tool (SWAT) Simulations, Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2017-66, in review, 2017.
Marcos R. C. Cordeiro et al.
Marcos R. C. Cordeiro et al.

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Deriving Canada-wide soils dataset for use in Soil and Water Assessment Tool (SWAT)
Marcos R. C. Cordeiro, Glenn Lelyk, Roland Kröbel, Getahun Legesse, Monireh Faramarzi, M. Badrul Masud, Tim McAllister
https://doi.org/10.1594/PANGAEA.877298
Marcos R. C. Cordeiro et al.

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Short summary
A Canada-wide soil dataset derived from the Soil Landscapes of Canada database for the SWAT model is presented. Hydrologic soils groups (HSG) and erodibility factor (not reported in the database) were calculated. In Canada, 21.3, 24.6, 39.0, and 15.1 % of soils belong to HSG 1, 2, 3, and 4, respectively. Erosion potential was linked to runoff potential in southern Ontario and Nova Scotia but moderate erosion potential was found in areas with high runoff potential in Manitoba and British Columbia
A Canada-wide soil dataset derived from the Soil Landscapes of Canada database for the SWAT...
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