沉积学报2000，Vol.18Issue(3)：346-348,3.
洱海环境沉积学研究——表层沉积物营养盐与粒度分布
The Environment Sedimentological Study of Erhai Lake－Correlation between nutrients and particle size distribution in superficial sediments
摘要
Abstract
Erhai lake, the second largest lake in the Yunnan Plateau in Southwest China, is located in Dali PrefecturewithNin LatitudeEin logitude Erhai. Lake is a typical rift lake in the Dali Basindeveloped along the YuaJiang-Hoonghe great fault and has been in existence since Later Pliocene. In November1996(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 thesections was grade Ⅲ ,with some of them reaching grade V. The sudden deterioration of water quality in Lake Er-hai has clearly indicated that the lake＇s water quality is at a critical state. In order to prevent occurrence of more eu-trophication in the future, study of nutrient and pollutant emissions from sediment to the lake by environment sedi-mentology methods would be necessary. By Studying relationship between nutrient and particle size distribution forthe Erhai lake＇s superficial seddiments, the results show that clay mineral is generally positively correlated with to-tal phosphorus, Fe-P and O-P. The multiple regression results suggest that there are apparently positive correlationamong TN,TON(total organic nitrogen), Tand deris minerals. The TP content is mainly comprised ofinorganic posphorus and positively correlated with sediments with higher content of clay minerals and smaller parti-cle size mainly deposited in the lake center in the northern part of Erhai lake.关键词
洱海表层沉积物粒度分布营养盐环境意义Key words
Erhai lake superficial sediments nutrients particle size distribution environmental significance分类
资源环境引用本文复制引用
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):346-348,3.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。 （）
