USING WRB TO MAP THE SOIL SYSTEMS OF ITALY

Risultato della ricerca: Other

Abstract

Aim of this work was to test the 2010 version of the WRB soil classification for compilating a mapof the soil systems of Italy at 1:500,000 scale. The source of data was the national geodatabasestoring information on 1,414 Soil Typological Units (STUs). Though, basically, we followed WRBcriteria to prioritize soil qualifiers, however, it was necessary to work out an original methodology inthe map legend representation to reproduce the high variability inside each delineation meanwhileavoiding any loss of information. Each map unit may represent a combination of three codominantSTUs at the most. Dominant STUs were assessed summing up the occurrence of STUsin the Land Components (LCs) of every soil system, where each LC is a specific combination ofmorphology, lithology and land cover. STUs were classified according to the WRB soilclassification system, at the third level, that is, reference soil group and first two qualifiers, whenpossible. Since the large number of delineations, map units grouping was needed to make the mapmore legible. Legend colours were organized according to soil regions groups firstly, then byconsidering the highest level of soil classification, so resulting a nidificated legend. The mapshowed 3,357 polygons and 704 map units. The most common STU were Calcaric Cambisols, byfar followed by Calcaric Regosols, Eutric Cambisols, Haplic Calcisols, Vertic Cambisols, CutanicLuvisols, Leptic Pheozems, Chromic Luvisols, Dystric Cambisols, Fluvic Cambisols, and othersSTUs belonging to almost all the WRB soil references. Keywords: geodatabase, soil systems
Lingua originaleEnglish
Pagine65-65
Numero di pagine1
Stato di pubblicazionePublished - 2012

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