| Lin Yi'an,Tang Renyou,Li Yan,Dong Henglin,Guan Xuwei,Chen Yinzu. 1995. Relationship between biogeochemical features of biogenic elements and flocculation in the Changjiang Estuary. Acta Oceanologica Sinica, (2):225－234 |
| Relationship between biogeochemical features of biogenic elements and flocculation in the Changjiang Estuary |
| Relationship between biogeochemical features of biogenic elements and flocculation in the Changjiang Estuary |
| Received:December 21, 1994 Revised:March 11, 1995 |
| DOI： |
| Key words:Flocculation biogeochemical features suspended particle matter biogenic elements the Changjiang Estuary |
| 中文关键词: Flocculation biogeochemical features suspended particle matter biogenic elements the Changjiang Estuary |
| 基金项目: |
| Author Name | Affiliation | | Lin Yi'an | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Tang Renyou | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Li Yan | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Dong Henglin | Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | Guan Xuwei | Shanghai Survey and Designing Institute of Ministry of Energy and Ministry of Water Resources, Shanghai 200434, China | | Chen Yinzu | Shanghai Survey and Designing Institute of Ministry of Energy and Ministry of Water Resources, Shanghai 200434, China |
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| Abstract: |
| This paper reports the relationship between the biogeochemical characteristics of C.N.P and flocculation and settling of suspended materials in the Changjiang Estuary.Regional activities of bacteria and the plankton and biogeochemical processes at the water-particle interface under some environmental conditions are quite variable.This leads to the transition of material phase with speciation variation of elements C.N.P.in the transfer processes.Therefore, the composition and reactivity of particle surface and dissolved constituent are modified, affecting the stability of the particulate dispersion system.In summer, the concentration of NO3- and PO43- are positively correlated with turbidity, while the weight percentage of PON, POC and PP are negatively correlated with turbidity.When particles in the river move seaward, two zones can be distinguished:ⅰ) zone with maximum flocculation speed, in salinity 0.1-2.0;ⅱ)zone with huge coagulating particles netting and high turbidity at the bottom, in salinity 2-11.The highest values of C/N in particles (or the low valley of C.E.C.of particle surface) appear in the two zones.These results demonstrate that the biogeochemical action is one of the major factors and mechanisms to dominate the flocculation of particles in the Changjiang Estuary. |
| 中文摘要: |
| This paper reports the relationship between the biogeochemical characteristics of C.N.P and flocculation and settling of suspended materials in the Changjiang Estuary.Regional activities of bacteria and the plankton and biogeochemical processes at the water-particle interface under some environmental conditions are quite variable.This leads to the transition of material phase with speciation variation of elements C.N.P.in the transfer processes.Therefore, the composition and reactivity of particle surface and dissolved constituent are modified, affecting the stability of the particulate dispersion system.In summer, the concentration of NO3- and PO43- are positively correlated with turbidity, while the weight percentage of PON, POC and PP are negatively correlated with turbidity.When particles in the river move seaward, two zones can be distinguished:ⅰ) zone with maximum flocculation speed, in salinity 0.1-2.0;ⅱ)zone with huge coagulating particles netting and high turbidity at the bottom, in salinity 2-11.The highest values of C/N in particles (or the low valley of C.E.C.of particle surface) appear in the two zones.These results demonstrate that the biogeochemical action is one of the major factors and mechanisms to dominate the flocculation of particles in the Changjiang Estuary. |
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