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引用本文:胡春华,濮培民,黄宜凯,胡维平.中国太湖五里湖内不同凤眼莲密度圈闭内的沉降率.湖泊科学,1998,10(s1):295-300. DOI:10.18307/1998.sup32
HU Chunhua,PU Peiming,Huang Yikai,HU Weiping.Sedimentation Rate in Enclosures with Various Densities of Eichhomia crassipes in Wulihu, Taihu Lake, China. J. Lake Sci.1998,10(s1):295-300. DOI:10.18307/1998.sup32
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中国太湖五里湖内不同凤眼莲密度圈闭内的沉降率
胡春华, 濮培民, 黄宜凯, 胡维平
Nanjing Institute of Geography & Limnology, CAS, Nanjing 210008, China
摘要:
The dynamic model of physical-biological engineering for purifying water quality in Lake Taihu needs the parameter of sedimentation rate (SR). Especially, it is seldom reported how SR is influenced by interactions between algae and aquatic plant. So 6 enclosures with each area of 5×5 m2 were constructed in Wulihu with 2 m depth, a small hypereutrophic bay of Taihu Lake, China. Enclosures, in which the original water quality was the same as that in surrounding lake, were input Eichhomia crassipes at various original densities from 0-6 kg·m-2 on August 9, 1996. SR had been measured separately at depths of 0.6, 1.2f 1.8 m in each enclosure during 20 days. Main results were as follows:1) SR average in enclosures (17.3g·m-2 d-1) was as much as about 1/14 that in the surrounding lake; 2) The deeper was it, the higher rate was it in each enclosure, generally; 3) SR cures versus original densities of Eichhomia crassipes (ODE) in enclosures had the ship of "V" at different depths; SR minimuma were observed in the enclosure with original meso-density of Eichhomia crassipes (EMESO, 4kg·m-2), the average of SR minimuma was about 8.55 g ·m-2 d-1) SR in enclosures with original hypo-density (EHYPO, 0-3kg·m-2) were mainly negative related with water temperature and light intensity;while those with original hyperdensity (EHYPR, 5-6kg·m-2) were mainly negative related with transparency (SD) instead.These SR-distribution characteristics may be explained by interactions between dead algae and relics of Eichhomia crassipes.
关键词:  Sedimentation rate  interactions between algae and Eichhomia crassipes  Taihu Lake
DOI:10.18307/1998.sup32
分类号:
基金项目:This is a part of the research results of China-Denmark Cooperative Research supported by European Union under the Fixed Contract No. CIl*-CT93-0094 (DG 12 HSMU).
Sedimentation Rate in Enclosures with Various Densities of Eichhomia crassipes in Wulihu, Taihu Lake, China
HU Chunhua, PU Peiming, Huang Yikai, HU Weiping
Nanjing Institute of Geography & Limnology, CAS, Nanjing 210008, China
Abstract:
The dynamic model of physical-biological engineering for purifying water quality in Lake Taihu needs the parameter of sedimentation rate (SR). Especially, it is seldom reported how SR is influenced by interactions between algae and aquatic plant. So 6 enclosures with each area of 5×5 m2 were constructed in Wulihu with 2 m depth, a small hypereutrophic bay of Taihu Lake, China. Enclosures, in which the original water quality was the same as that in surrounding lake, were input Eichhomia crassipes at various original densities from 0-6 kg·m-2 on August 9, 1996. SR had been measured separately at depths of 0.6, 1.2f 1.8 m in each enclosure during 20 days. Main results were as follows:1) SR average in enclosures (17.3g·m-2 d-1) was as much as about 1/14 that in the surrounding lake; 2) The deeper was it, the higher rate was it in each enclosure, generally; 3) SR cures versus original densities of Eichhomia crassipes (ODE) in enclosures had the ship of "V" at different depths; SR minimuma were observed in the enclosure with original meso-density of Eichhomia crassipes (EMESO, 4kg·m-2), the average of SR minimuma was about 8.55 g ·m-2 d-1) SR in enclosures with original hypo-density (EHYPO, 0-3kg·m-2) were mainly negative related with water temperature and light intensity;while those with original hyperdensity (EHYPR, 5-6kg·m-2) were mainly negative related with transparency (SD) instead.These SR-distribution characteristics may be explained by interactions between dead algae and relics of Eichhomia crassipes.
Key words:  Sedimentation rate  interactions between algae and Eichhomia crassipes  Taihu Lake
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