洱海环境沉积学研究——表层沉积物营养盐与粒度分布
- 1 中国科学院地质与地球物理研究所 北京德外祁家豁子 100029;
- 2 云南省大理白族自治州城乡建设环保局 云南大理 671000;
- 3 中国科学院广州地球化学所有机地球化学国家重点实验室 广州 510400
基金项目:
中国科学院广州地球化学所有机地球化学国家重点实验室基金的资助
作者简介:
李原,男,1964年出生,博士后,生物地球化学及环境沉积学李原(1998)"洱海环境化学和环境沉积学研究"博士后研究报告,博士后管理委员会,内部资料
- 收稿日期:
1999-03-04
- 修回日期:
2000-01-02
- 刊出日期:
2000-09-10
摘要: 云南洱海表层沉积物营养盐与粒度分布的相互关系的研究结果表明 :湖泊水动力较弱的水域,TP、Fe_P、O_P与粘土矿物的相关性较好。而近岸水动力较大的水域,如河溪入湖处,有利于TN、TOC、氨氮、残留磷的富集,它们与碎屑矿物的相关性很好,如石英和方解石。另外,沉积物中粘土矿物越多,粒径越小,沉积物对磷的吸附作用就越强,在洱海这种类型的沉积物主要分布在远岸深水 -较深水的北部湖心。
The Environment Sedimentological Study of Erhai Lake－Correlation between nutrients and particle size distribution in superficial sediments
- 1 Institute of Geology, Chinese Academy of Sciences, Dewai Street, Beijing 100029;
- 2 Urban Rural Construction and Environment-protection Bureau of Dali Bai Prefecture,Dali Yunnan 671000;
- 3 The State Key Lab of Organic Gaxbemistry, Guangchou Institule of Geochemistry Chinese Academy of Sciences, Guangzh0u 510400
- Received Date:
1999-03-04
- Rev Recd Date:
2000-01-02
- Publish Date:
2000-09-10
Abstract: Erhai lake,the second largest lake in the Yunnan Plateau in Southwest China,is located in Dali Prefecture with 25°35'to 25°58'Nin Latitude 100°05'to 100°07'Ein logitude Erhai Lake is a typical rift lake in the Dali Basin developed along the YuaJiang Hoonghe great fault and has been in existence since Later Pliocene.In November 1996(winter),the lake water quality was still in a poor condition,with a low concentration of dissolved oxygen.The lowest Do value was 1.7 mg/L.Results of comprehensive assesment indicate that water quality at most of the sections was grade III,with some of them reaching grade IV.The sudden deterioration of water quality in Lake Erhai has clearly indicated that the lake's water quality is at a critical state.In order to prevent occurrence of more eutrophication in the future,study of nutrient and pollutant emissions from sediment to the lake by environment sedimentology methods would be necessary.By Studying relationship between nutrient and particle size distribution for the Erhai lake's superficial seddiments,the results show that clay mineral is generally positively correlated with total phosphorus,Fe P and O P. The multiple regression results suggest that there are apparently positive correlation among TN,TON(total organic nitrogen),T HN 3,A'% and deris minerals.The TP content is mainly comprised of inorganic posphorus and positively correlated with sediments with higher content of clay minerals and smaller particle size mainly deposited in the lake center in the northern part of Erhai lake.
李原, 李任伟, 尚榆民, 李宁波, 卢家烂. 洱海环境沉积学研究——表层沉积物营养盐与粒度分布[J]. 沉积学报, 2000, 18(3): 346-348.
| 引用本文: |
李原, 李任伟, 尚榆民, 李宁波, 卢家烂. 洱海环境沉积学研究——表层沉积物营养盐与粒度分布[J]. 沉积学报, 2000, 18(3): 346-348.
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LI Yuan, LI Ren wei, SHANG Yu min, LI Ning bo, LU Jia lan. The Environment Sedimentological Study of Erhai Lake－Correlation between nutrients and particle size distribution in superficial sediments[J]. Acta Sedimentologica Sinica, 2000, 18(3): 346-348.
| Citation: |
LI Yuan, LI Ren wei, SHANG Yu min, LI Ning bo, LU Jia lan. The Environment Sedimentological Study of Erhai Lake－Correlation between nutrients and particle size distribution in superficial sediments[J]. Acta Sedimentologica Sinica, 2000, 18(3): 346-348.
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