Anthropic influences on the sedimentation rates of lakes situated in different geographic areas.
The aim of this study is to determine the effects of natural and anthropic events occurring in the last 30 years in the catchment areas of four Romanian lakes (St. Anna Lake, Red Lake, Vârşolţ Lake and Matiţa Lake) originating from four different geomorphologic areas. A total of eleven sediment cores have been processed for age and sedimentation rate determination using the210Pb dating method. Total210Pb was measured via alpha spectrometry by210Po using PIPS detectors, while supported210Pb was measured by226Ra using HPGe detectors. Ages and sedimentation rates were calculated using the CRS model. The values of the sedimentation rates have grown multiply in the last three decades: 2.66 times in case of the St. Anna Lake (from 0.06 ± 0.01 g/cm2y to 0.16 ± 0.02 g/cm2y), up to 6.72 times in case of Red Lake (0.36 ± 0.04 g/cm2y to 2.42 ± 0.36 g/cm2y), 4.02 times in case of Vârşolţ Lake (04 g/cm2y to 1.53 ± 0.18 g/cm2y) and up to 16.18 times in case of Matiţa Lake (0.27 ± 0.03 g/cm2y to 4.37 ± 0.32).
Babeş-Bolyai University, Faculty of Environmental Science and Engineering, 30 Fântânele Street, 400294, Cluj-Napoca, Romania.
Hedvig
H
Simon
Babeş-Bolyai University, Faculty of Environmental Science and Engineering, 30 Fântânele Street, 400294, Cluj-Napoca, Romania.
Szabolcs
S
Kelemen
Babeş-Bolyai University, Faculty of Environmental Science and Engineering, 30 Fântânele Street, 400294, Cluj-Napoca, Romania; Interdisciplinary Research Institute on Bio-Nano-Science, Babes-Bolyai University, Treboniu Laurean 42, 400271, Cluj-Napoca, Romania. Electronic address: robert.begy@ubbcluj.ro.
Róbert-Csaba
RC
Begy
D019015:Geologic Sediments / Q000032:analysis; D060106:Lakes / Q000737:chemistry; D007856:Lead Radioisotopes / Q000032:analysis; D011834:Radiation Monitoring; D014875:Water Pollutants, Radioactive / Q000032:analysis*
D007856:Lead Radioisotopes; D014875:Water Pollutants, Radioactive
(210)Pb dating; (210)Po; Anthropic influences; Lake sediment; Sedimentation rate