Scholarly record
A NATIONAL-SCALE ASSESSMENT OF THE TOPSOIL CLAY CONTENT MAP OF ROMANIA DERIVED FROM THE LUCAS SURVEY
Abstract
The clay consists of the tiniest particles of soil, which have a considerable amount of physical and chemical activity with influence on water and nutrient cycles, observable over several scales. Therefore, the Global Soil Map Project (GSM) has included clay content among the key properties estimated across the world at 100 m resolution. Subsequently, in 2015 the Joint Research Centre (JRC) of the European Commission produced a clay content map of the soil uppermost layer (called пїЅtopsoilпїЅ), converging towards the GSM specifications. JRC produced this raster map at 500 m resolution, in the coordinate system ETRS89-LAEA, recommended by the INSPIRE Directive for spatial analysis. The JRC map contains values estimated - based on point soil data measured in the field during the LUCAS-2009 survey of EUROSTAT- using advanced statistical methods and environmental covariates relevant to soil forming processes. The present paper addresses the need for feedback on/validation of this JRC map. It proposes a general method for comparing continuous raster maps at medium-coarse resolutions to other spatial datasets, in case there are no sufficient data for applying geostatistical techniques. The paper shows the results of the method application for the JRC topsoil clay content map (952,065 cells at 500m resolution within Romania), obtained due to the reference/legacy data existing across the territory of Romania. For this purpose, the main reference information on topsoil clay content comes from the vector soil map SIGSTAR-200k, which has national coverage and the most suitable available granularity for evaluating the content of the above JRC map. The comparison method opted for the preservation of the reference information on topsoil clay content during the mathematical processing. Accordingly, the soil map SIGSTAR-200k was transformed into the coordinate system ETRS89-LAEA. Afterwards, data derived from the JRC map (e.g., as area-weighted average) were ingested by the SIGSTAR-200k polygons having been intersected, so the main comparison phase could take place. An additional comparison used legacy statistical information on topsoil clay content for the main soil types in Romania, estimated thanks to 2735 soil profiles selected from the "PROFISOL" database.
Publication Impact Profile
Publication details
References11
Chen F. & Dudhia J., Coupling an advanced land surface hydrology model with the Penn State NCAR MM5 modeling system. Part I: Model implementation and sensitivity, Monthly Weather Review, Vol. 129(4), pp. 569-585, 2001;
Pitman A.J, The evolution of, and revolution in, land surface schemes designed for climate models, International Journal of Climatology, Vol. 23(5), pp. 479-510, 2003;
Vintila R., Visan A.N., Balota L.O., Dumitru S. & Eftene C.A., Contribution to the use of freely-available data for the prediction of topsoil properties and generation of INSPIRE-compliant maps at medium spatial resolutions. In: Int. Multidisciplinary Scientific GeoConferences SGEM 2015, Bulgaria, Proc. Informatics, Geoinformatics and Remote Sensing, Vol. II, pp. 779-786, 2015;
Ballabio C., Panagos P. & Montanarella L., Mapping topsoil physical properties at European scale using the LUCAS database, Geoderma, Vol. 261, pp. 110-123, 2016;
Vintila R., Visan A. N, Vlad V., Dumitru S. & Radnea, C., Feedback on the Topsoil Textural Classes Map for Romania derived using the LUCAS-2009 dataset. In: Int. Multidisciplinary Scientific GeoConferences SGEM 2016, Bulgaria, Proc. Informatics, Geoinformatics and Remote Sensing, Book 2, Vol. III, pp. 223-230, 2016;
Heuvelink G.B., Kros J., Reinds G.J.&De Vries W., Geostatistical prediction and simulation of European soil property maps, Geoderma Reg, Vol.7(2), pp.201-215, 2016;
Canarache A., Sinteza datelor privind alcatuirea granulometrica a solului, obtinute prin prelucrarea bazei de date Profisol: 1. Cernisoluri (Synthesis of data concerning soil particle-size from Profisol database: 1. Kastanozems, Chernozems, Phaeozems and Rendzinas), Factori si procese pedogenetice din zona temperate (ISSN 2285-5696), Vol 4 (1), pp. 55-67, 2005 (in Romanian);
Canarache A., Synthesis of data concerning soil particle-size from Profisol database: 2. Luvisols and Pelisols, Factori si procese pedogenetice din zona temperate (ISSN 2285-5696), Vol 7 (1), pp. 17-29, 2008;
Canarache A., Synthesis of data concerning soil particle-size from Profisol database: 3. Umbrisols, Cambisols, Spodisols and Andisols, Factori si procese pedogenetice din zona temperate (ISSN 2285-5696), Vol 7 (1), pp. 37-45, 2008;
Canarache A., Florea N., Risnoveanu A. & Latis L. (co-ordinators), Indicatorii ecopedologici. In: Metodologia elaborarii studiilor pedologice (Ecopedological Parameters. In: Soil Survey Methodology), ICPA Bucharest: Methods and Reports 20C, Vol. 3, 1987 (in Romanian);
Florea N., Balaceanu V., Munteanu I., Asvadurov H., Conea A., Oancea C., Cernescu N. & Popovat M. (co-ordinators), The Soil Map of Romania at the scale 1:200,000; 50 sheets, 1963-1993 & General Legend,1 sheet - A1 format, 1994, Geological Institute - IGFCOT Bucharest (in Romanian).
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.
