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沉积物粒度记录的异龙湖近百年环境演变过程
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Abstract:
2021年1至3月，在云南师范大学地理学部实验室使用马尔文激光粒度分析仪对异龙湖东西湖区两根钻孔沉积物样本进行粒度分析，依据有关研究建立沉积物年代序列，结合人类活动和历史资料对两根钻孔沉积物粒度组分进行分别研究，揭示了沉积物粒度记录的近百年来异龙湖环境演化过程和标志事件。研究结果表明1918年、1952年、1978年、2005年、2011年异龙湖区域的环境事件在钻孔沉积物粒度中均有粒度记录，沉积事件的识别特征明显。基于同样的机理，如其他湖泊有类似的沉积特征，可对其他湖区沉积物粒度的解释提供一定参考。
From January to March in 2021, the grain size of sediment samples from two boreholes in the East-West Lake area of Yilong Lake was analyzed by Malvern laser particle size analyzer in the laboratory of the Department of geography of Yunnan Normal University. Based on the relevant research, the sediment age sequence was established. Combined with human activities and historical data, the grain size components of sediments from two boreholes were studied respectively. It reveals the environmental evolution process and marker events of Yilong Lake recorded by sediment grain size in recent 100 years. The results show that the environmental events in Yilong Lake area in 1918, 1952, 1978, 2005 and 2011 have grain size records in the borehole sediments, and the identification characteristics of sedimentary events are obvious. Based on the same mechanism, if other lakes have similar sedimentary characteristics, it can provide some reference for the interpretation of sediment grain size in other lakes.
| [1] | 陈敬安, 万国江, 黄荣贵. 云南程海沉积物粒度研究[J]. 环境科学进展, 1999, 7(4): 77-80. |
| [2] | 郭晓阳, 王维, 王国良, 等. 季风边缘区湖泊表层沉积物粒度组分分布特征与影响因素[J]. 地理研究, 2016, 35(4): 677-678. |
| [3] | 章婷曦, 文莹亭, 董丹萍, 等. 太湖西北部表层沉积物粒度特征与沉积环境[J]. 湖泊科学, 2018, 30(3): 836-846. |
| [4] | 陈思思, 张虎才, 常凤琴, 等. 异龙湖湖泊沉积对流域人类活动的响应[J]. 山地学报, 2016, 34(3): 274-281. |
| [5] | 周虹霞, 刘卫云, 孔德平, 等. 异龙湖湿地大型水生植物群落特征分析[J]. 环境科学与技术, 2016, 39(9): 199-203. |
| [6] | 赵磊. 云南异龙湖生态系统稳态转换过程与关键灾变因子反演研究[D]: [博士学位论文]. 北京: 中国科学院生态环境研究中心, 2013. |
| [7] | 王苏民, 窦鸿身. 中国湖泊志[M]. 北京: 科学出版社, 1998: 379-381. |
| [8] | 李浩杰, 种丹, 范硕, 张世强, 王杰. 近三十年云南九大高原湖泊水面面积遥感变化监测[J]. 长江流域资源与环境, 2016, 25(S1): 32-37. |
| [9] | Qin, X.G., Cai, B.G. and Liu, T.S. (2005) Loess Record of the Aerodynamic Environment in the East Asia Monsoon Area Since 60,000 Years before Present. Journal of Geophysical Research: Solid Earth, 110, B01204. https://doi.org/10.1029/2004JB003131 |
| [10] | 张龙吴, 张虎才, 常凤琴, 等. 云南异龙湖沉积物粒度空间变化特征及其环境指示意义[J]. 第四纪研究, 2019, 39(5): 1159-1170. |
| [11] | 胡葵. 滇东南湖泊藻类响应流域开发和极端气候的长期特征[D]: [硕士学位论文]. 昆明: 云南师范大学, 2017. |
| [12] | 吴汉, 常凤琴, 张虎才, 等. 异龙湖近百年来湖泊沉积物有机碳、氮稳定同位素变化及其环境指示意义[J]. 生态学杂志, 2020, 39(8): 2478-2487. |
| [13] | 和向东, 陈枳颖, 丁德鼎, 等. 异龙湖表层沉积物有机质含量空间分布初步研究[J]. 环境科学导刊, 2020, 39(6): 18-20. |
| [14] | 王阿敏. 近百年来长江中游牛轭湖沉积对人类活动的响应——以天鹅洲、中洲子为例[D]: [硕士学位论文]. 上海: 上海师范大学, 2016. |
| [15] | Friedman, G.M. (1979) Address of the Retiring President of the International Association of Sedimentologists: Difference in Size Distributions of Populations of Particles among Sands from Various Origins. Sedimentology, 26, 3-32. https://doi.org/10.1111/j.1365-3091.1979.tb00336.x |
| [16] | 金秉福. 粒度分析中偏度系数的影响因素及其意义[J]. 海洋科学, 2012, 36(2): 129-135. |
| [17] | Gao, S., Collins, M.B., Lanckneus, J., et al. (1994) Grain Size Trends Associated with Net Sediment Transport Patterns: An Example from the Belgian Continental Shelf. Marine Geology, 121, 171-185. https://doi.org/10.1016/0025-3227(94)90029-9 |
| [18] | Zhao, L., Peng, X.C., Zhong, H.X., et al. (2016) Characteristics of Grain Size Distribution of Surface Sediments and Depositional Environments in the Northern Shelf Region of the South China Sea. Marine Geology & Quaternary Geology, 36, 111-122. |
| [19] | Ge, C.D., Slaymaker, O. and Pedersen, T.F. (2003) Change in the Sedimentary Environment of Wanquan River Estuary, Hainan Island, China. Chinese Science Bulletin, 48, 2357-2361. |
| [20] | 殷勇, 朱大奎, 唐文武, 等. 博鳌地区沙坝-泻湖沉积及探地雷达的应用[J]. 地理学报, 2002, 57(3): 301-309. |
