Effects of sediment resuspension on aqueous nutrient loading in grass type zone of Lake Taihu

Internal nutrient loading caused by sediment resuspension is becoming a key issue in studying water eutrophication of shallow lakes. A Y-shape apparatus was used to simulate sediment resuspension and sedimentation process under hydrodynamic conditions in situ in grass type zone of Lake Taihu, and ef...

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Bibliographic Details
Published inHuanjing kexue Vol. 29; no. 1; p. 26
Main Authors You, Ben-Sheng, Wang, Tong-Cheng, Fan, Cheng-Xin, Zhong, Ji-Cheng, Yin, Hong-Bin, Li, Bao
Format Journal Article
LanguageChinese
Published China 01.01.2008
Subjects
China
Environmental Monitoring - methods
Eutrophication
Fresh Water - analysis
Fresh Water - chemistry
Geologic Sediments - chemistry
Nitrogen - analysis
Phosphates - analysis
Poaceae - growth & development
China
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Summary:Internal nutrient loading caused by sediment resuspension is becoming a key issue in studying water eutrophication of shallow lakes. A Y-shape apparatus was used to simulate sediment resuspension and sedimentation process under hydrodynamic conditions in situ in grass type zone of Lake Taihu, and effects on aqueous nutrient loading were investigated. The results indicated that, in the light and moderate wind processes, content of ammonia nitrogen and phosphate had remarkably reduced with the increase of the amount of suspended sediments in water column, with the maximal change of -0.140 g x m(-2) and -1.59 mg x m(-2) at the sediment-water interface for the two nutrients respectively, and in the strong wind process, concentration of aqueous phosphate had a significant increase, with the maximal flux of 0.81 mg x m(-2) at the sediment-water interface, while concentration of aqueous ammonia nitrogen showed a small decrease. And in the later sedimentation process after wind, content of aqueous ammonia nitrogen wa
ISSN:0250-3301