Vpliv začasne zasedbe kmetijskih zemljišč z deponijo gramoza ob gradbenih posegih na lastnosti tal

Marko ZUPAN, Vesna ZUPANC, Helena GRČMAN

Povzetek


Namen raziskave je bil preveriti lastnosti tal na območju spodnje Save po rekultivaciji zaradi začasne zasedenosti zemljišč za deponijo gramoza. Po pregledu območja (sondiranje) smo na dveh mestih izkopali talna profila; profil 1 na delu, kjer je bila na obstoječa tla odložena odstranjena rodovitna zemljina; profil 2 na delu, kjer je bil vrhnji sloj tal pred deponiranjem gramoza odstranjen in nato ponovno vzpostavljen. Odvzeli smo neporušene in porušene talne vzorce za merjenje fizikalnih in kemijskih lastnosti tal. Izmerili smo teksturo, volumsko gostoto tal, nasičeno hidravlično prevodnost, pH, vsebnost organske snovi, parametre kationske izmenjalne kapacitete in rastlinam dostopna hranila. Ugotovili smo, da kemijske lastnosti v splošnem niso ovirale rodovitnosti tal. Zbitost tal je omejevala hidravlično prevodnost in povzročila zastajanja vode. Na območju, kjer je bil deponiran material neposredno na površino tal, je bila gostota tal od 1,41 do 1,77 g cm-3. Tla so bila na tem delu praktično neprepustna na globinah 10, 20 in 30 cm, kar kaže na veliko zbitost zaradi mehanskih obremenitev. Tla, na območju, kjer je bila vrhnja plast tal odstranjena in po odstraniti začasne deponije ponovno nanesena, so bila manj zbita. Odstranitev zgornje plasti tal pred deponiranjem gramoza je bil ustrezen ukrep, vendar so potrebni tudi melioracijski ukrepi po zaključku gradbenih del.


Ključne besede


obrečna tla; degradacija tal; rekultivacija tal; fizikalne lastnosti tal; kemijske lastnosti tal

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2022.118.1.2415

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Avtorske pravice (c) 2022 Marko ZUPAN, Vesna ZUPANC, Helena GRČMAN

 

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