Naslov
IMPORTANCE OF REPRESENTATIVE SEDIMENT SAMPLE FOR ENVIRONMENTAL INTERPRETATION: A CASE STUDY IN THE LAKE VISOVAC, KRKA RIVER, CROATIA

Autori
Cukrov, Nuša ; Barišić, Delko ; Heller, Beatrix ; Lojen, Sonja ; Cukrov, Neven.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
The Book of Abstracts and Programme, V International Symposium of Ecologists of Montenegro / Vladimir Pešić - Podgorica : Centre for Biodiversity of Montenegro, 2013, 117-118

ISBN
978-86-908743-4-7

Skup
V INTERNATIONAL SYMPOSIUM OF ECOLOGISTS OF THE REPUBLIC OF MONTENEGRO

Mjesto i datum
Tivat, Crna Gora, 02.10.2013. - 05.10.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
representative sediment; radionuclides. Krka River; 40K; 232Th

Sažetak
To determine representativeness of sediment sample for studied area (Krka River National Park, Croatia), sampling was carried out in three regular plots (2x2 m, 3x3 m) at the bottom of the Visovac Lake where undisturbed sediments and continuous sedimentation were expected. 14 sediment columns were sampled by scuba diver with hand-driven acrylic corer. Sediment columns were cut in 5cm slices and analyzed for activities of natural radionuclides (40K and 232Th) which are known as a good tracer of terrigenous material input. Statistical analyzes of obtained results show good correlation (> 0.95) of 40K and 232Th activities in all three (0-5 cm, 5-10 cm, 10-15 cm) investigated sediment layers. Activities of 40K and 232Th are decreasing downstream, indicating decreasing of terrigenous material input. Spatial variations in small distances (1m) were considerable in upper part of the Lake. That is especially evident in the surface sediment layer (0-5 cm) where variations between neighbor samples may influence environmental interpretation.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA