DOI: 10.1016/j.watres.2018.04.024
Scopus记录号: 2-s2.0-85047413137
论文题名: Distribution, sedimentation, and bioavailability of particulate phosphorus in the mainstream of the Three Gorges Reservoir
作者: Tang X. ; Wu M. ; Li R.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 44
结束页码: 55
语种: 英语
英文关键词: Particulate phosphorus (PP)
; Sedimentation
; Suspended sediment (SS)
; Three Gorges Reservoir (TGR)
; Water bloom
Scopus关键词: Biochemistry
; Blooms (metal)
; Flow velocity
; Integral equations
; Iron compounds
; Particle size
; Phosphorus
; Reservoirs (water)
; Sedimentation
; Surface waters
; Suspended sediments
; Water levels
; Maximum correlation coefficient
; Median particle size
; Particulate phosphorus
; Phosphorus distribution
; Pseudo second order kinetics
; Sedimentation process
; Three gorges reservoir
; Water-bloom
; Aluminum compounds
; phosphorus
; bioavailability
; experimental study
; field survey
; particulate matter
; phosphorus
; reaction kinetics
; sedimentation
; spatial distribution
; suspended sediment
; Article
; bioavailability
; correlation coefficient
; distribution parameters
; flow rate
; kinetic parameters
; nutritional status
; particle resuspension
; particle size
; physical chemistry
; priority journal
; sedimentation
; zeta potential
; China
; Three Gorges Reservoir
英文摘要: The transportation and sedimentation of particulate phosphorus (PP) in a huge reservoir such as the Three Gorges Reservoir (TGR) are closely related to the phosphorus distribution characteristics and nutritional status of the water body. In this study, the PP distribution, sedimentation, and bioavailability in the mainstream section of the TGR were investigated through a field survey, indoor simulated settlement experiment, and historical data analysis. The results indicated that PP was the major component of the total phosphorus (TP) and that the Three Gorges Dam (TGD) trapped nearly 76.25% of suspended sediment (SS) and 75.35% of PP in the TGR, even during the flood season. A decline in flow velocity promoted the deposition of PP; additionally, PP concentrations gradually dropped from 0.35 mg/L in Chongqing to 0.02 mg/L in Zigui. The static PP sedimentation process adequately fitted a pseudo-second-order kinetic equation with a maximum correlation coefficient of 0.97. Moreover, more than half of the PP sedimentation process was achieved in less than 60 min for samples collected from the upper river reaches within simulated sedimentation process. The median particle size of SS and absolute value of the water column's zeta potential were negatively and positively related to the t[Formula presented] values of PP sedimentation, respectively. Compared with the concentration and particle size of SS obtained in the pre-TGR period, the values in the mainstream section of the TGR were lower. However, the TP and Fe/Al–P contents in SS increased several times. Due to the combined effects of flow velocity reduction and SS trapping, the water transparency and bioavailability of water column phosphorus were enhanced. Thus, the risk of water bloom outburst significantly increased when the impounded water level of 175 m in the TGR became the normal state. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112725
Appears in Collections: 气候减缓与适应
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作者单位: Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Wuhan, 430010, China; Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province, Wuhan, 430010, China
Recommended Citation:
Tang X.,Wu M.,Li R.. Distribution, sedimentation, and bioavailability of particulate phosphorus in the mainstream of the Three Gorges Reservoir[J]. Water Research,2018-01-01,140