Author:
Gao Hongbin,Zhang Rui,Wang Gang,Fan Yanru,Zhu Xinfeng,Wu Junfeng,Wu Li
Abstract
The distribution of sediment grain size can record past environmental conditions and human activity. In this study, radioisotope of 210Pb and 137Cs and a grain size of a 41 cm core in Hulun Lake were applied to reconstruct the high-resolution sedimentation history. The profiles of the grain size of the lake sediments show that silt (4–63 µm) was the largest contribution with an average content of 84.05%, and the second largest contribution was sand (>63 µm) with an average content of 15.68%. The median grain size and the mean grain size in the whole sediment core was 22.39 μm and 36.85 μm, respectively. Correlations of the sedimentological variables with instrumental measurements were also analyzed. The peak–trough value of the mean grain size of the sediments in Hulun Lake can reflect the magnitude of rainfall intensity and river discharge. The clay and silt contents at a depth of approximately 32–38 cm was different from other depths throughout the core, which showed continuous maxima with an average content of 0.35% and 94.08%. These changes in grain size correspond to the period of dam construction in 1963–1970. Therefore, the sediment grain size of Hulun Lake effectively recorded the dam-building activity.
Funder
Natural Science Foundation of Henan province
National College Students’ Innovation and Entrepreneurship Training Program
Open-ended Fund of State Key Lab. Of Hydrology-Water Resources and Hydraulic Engineering, Hohai University
Henan Provincial Department of Education Key Project
Project of Young Core Instructor of Henan University of Urban Construction
Science and Technology Project of Henan Province
Subject
Water Science and Technology,Aquatic Science,Geography, Planning and Development,Biochemistry
Reference28 articles.
1. A 15,000-yr paleo-environmental record from Lake Chapala, west-central Mexico;Espinoza-Encinas;J. Paleolimnol.,2022
2. Effects of cleaning methods upon preservation of stable isotopes and trace elements in shells of Cyprideis torosa (Crustacea, Ostracoda): Implications for palaeoenvironmental reconstruction;Roberts;Quat. Sci. Rev.,2018
3. Sediment record of abrupt environmental changes in Lake Chenpu, upper reaches of Yellow River Basin, north China;Wang;Environ. Earth Sci.,2014
4. Late Pleistocene Paleoflood Deposits Identified by Grain Size Signatures, Parsons Valley Lake, Nilgiris, Tamil Nadu;Raja;J. Geol. Soc. India,2018
5. Comparison of grain-size distributions between nearshore sections and a deep-water sediment core from Dali Lake, North China, and inferred Holocene lake-level changes;Liu;J. Paleolimnol.,2016
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献