ANALYSIS OF PEDOLOGICAL FACTORS AND USCS IN THE CONTACT AREA OF ĐAKOVO LOESS PLATEAU AND DILJ GORA, CROATIA

Autor: Heštera, Hrvoje, Croatian Defence Academy 'Dr Franjo Tuđman', Ilica 256b, 10000 Zagreb, Croatia
Rok vydání: 2020
Předmět:
Zdroj: Rudarsko-geološko-naftni zbornik
Volume 35
Issue 1
Rudarsko-geološko-naftni Zbornik, Vol 35, Iss 1, Pp 13-22 (2020)
ISSN: 1849-0409
0353-4529
DOI: 10.17794/rgn.2020.1.2
Popis: The pedological factors concerning the Unified Soil Classification System (USCS) in the contact area of Đakovo loess plateau and Dilj gora have been explored. The study was carried out to create a cross-country mobility map for vehicles. The spatial GIS analysis included soil units of Basic Soil Map (BSM) at a scale of 1:50000, which, according to the World Reference Base (WRB), contain within themselves the distribution of soil units, particle size distribution according to the United States Department of Agriculture (USDA) soil classification and organic content, as well as data from the Basic Geological Map (BGM) at a scale of 1:100000, together with the information on the original parent material from which the soils originate. Field sampling (72 samples) and laboratory sample analysis were performed according to the USCS. The samples were collected at the same locations (50 samples) as the profiles which had been extracted during the development of BSM to enable a comparison of the two classification systems. The analysis did not confirm a clear statistical connection between the USDA and USCS. The compatibility of BSM pedological units and low plasticity clays (CL) is clearly visible in all units, except for the units located on the alluvium. The presence of low plasticity clay (CL) and high plasticity clay (CH) has been confirmed in the stagnosols on the alluvium. By incorporating the geological basis into the spatial analysis, low plasticity clays were found to belong to the Quaternary source material, whereas high plasticity clays were formed on the parent substrate of Neogene age. Data analysis and cartographic representation of the results according to the Waterways Experiment Station (WES) Method of the cone index were obtained using fuzzy logic. The principles of fuzzy logic were used at the boundaries of pedological units due to the inability to define clear boundaries or the cessation of a particular type of soil’s presence.
U radu se istražuju pedološki čimbenici u podjeli tla Unified Soil Classification System (USCS) na kontaktnome području đakovačke lesne zaravni i pobrđa Dilj-gore. Istraživanje je provedeno s ciljem izrade karte terenske prohodnosti tla za vozila. U prostornu GIS analizu uključene su pedološke jedinice Osnovne pedološke karte (BPM) u mjerilu 1 : 50 000, koje unutar sebe sadržavaju raspodjelu pedoloških jedinica prema bazi World Reference Base (WRB), granulometrijsku razdiobu prema United States Department of Agriculture (USDA), klasifikaciji tla i udjelu humusa, te podatke Opće geološke karte 1 : 100 000 (BGM) kao izvorišnoga matičnog supstrata od kojega je tlo nastalo. Provedeno je terensko uzorkovanje (72 uzorka) i laboratorijska analiza uzoraka prema USCS-u. Uzorci su uzimani na istovjetnim mjestima (50 uzoraka) kao i profili vađeni tijekom izrade BPM-a kako bi se omogućila usporedba dvaju klasifikacijskih sistema. Provedbom analiza nije utvrđena jasna statistička veza između USDA i USCS klasifikacija tla. Podudarnost pedoloških jedinica BPM-a i glina niske plastičnosti (CL) jasno je vidljiva kod svih jedinica, osim kod jedinica koje se nalaze na aluviju. Amfiglejna tla na aluviju imaju prisustvo CL-a i glina visoke plastičnosti (CH). Uključivanjem geološke osnove u prostornu analizu utvrđeno da CL pripadaju izvorišnim dijelovima kvartarne starosti, dok su CH nastale na matičnome supstratu neogenske starosti. Obrada rezultata i kartografski prikaz rezultata prema metodi konusnoga indeksa Waterways Experiment Station (WES) dobiveni su primjenom neizrazite logike. Principi neizrazite logike korišteni su na dodirima pedoloških jedinica zbog nemogućnosti definiranja jasnih granica pojavnosti, odnosno prestanaka prisutnosti određenoga tipa tla.
Databáze: OpenAIRE
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