Impact of aquaculture on eutrophication in Changshou Reservoir

Zhang, Sheng; Liu, Jinghong; Wei, Shiqiang; Gao, Jixi; Wang, Dingyong; Zhang, Ke

doi:10.1007/bf02894800

Cited by 21 publications

(5 citation statements)

References 3 publications

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“…(1) Where K is the safety factor, p is the design internal water pressure, r is the inner radius of penstocks, 3 t and yk f are the equivalent thickness and yield strength of the circumferential reinforce, respectively, 0 t and s σ is the thickness and yield strength of the steel lining, respectively, ϕ is the weld coefficient. The ratio of 3 t to 0 t is from 0.355 to 2.51 in those existing penstocks, and some literatures show that the safety margin and crack control capacity can be improved when increase the ratio properly [10,11].…”

Section: Methods For Analyzing Internal Forces and Steel Arrangementmentioning

confidence: 99%

Internal Forces and Steel Arrangement Analysis on the Steel Lined Reinforced Concrete Penstocks

Zhang

Yang

et al. 2011

AMM

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he steel lined reinforced concrete penstocks (SLRCP) is always looked as an axisymmetric structure according to the design code, which can not show the true load-carrying capacity when considering the dam’s constraint to the SLRCP. In this paper, the physical non-axisymmetric property of the structure is simulated using the finite element method. The internal force distribution of every cross section in the SLRCP is studied, and a design method for steel arrangement based on axial force is proposed. When considering the non-axisymmetric property, the axial force in those cross sections approaching the bottom of the structure may be reduced more than 30% to the calculated value by the axisymmetric analysis. The larger the inner radius of the penstock or the thickness of the concrete wall is, the more marked the non-axisymmetric property of the SLRCP is.

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Section: Methods For Analyzing Internal Forces and Steel Arrangementmentioning

confidence: 99%

Internal Forces and Steel Arrangement Analysis on the Steel Lined Reinforced Concrete Penstocks

Zhang

Yang

et al. 2011

AMM

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“…The concentration levels of SO 2 , NO 2 and PM 10 are close to or exceed the second limitation values in the Chinese national air quality standards [1,3]. Compared with high NO X level in the southern cities, particulate matter is the primary pollutant in the northern cities [4]. The urban atmospheric monitoring webs have been set up and widely used.…”

Section: Introductionmentioning

confidence: 98%

Mathematical Optimization of Monitoring Stations for Atmospheric Environment in Taiyuan City, Shanxi Province, China

Yan

2012

AMR

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Based on some daily monitoring date from Taiyuan Environmental Monitoring Central Station during Dec 2008 to Nov 2009, the atmospheric pollution situation of Taiyuan was evaluated. The results showed that: the concentration of SO2、NO2 and PM10 in Taiyuan was 0.0228 mg/m3、0.0198 mg/ m3 and 0.1051mg/ m3，and the inhaled particulate matter pollution is Primary contamination. In the end, the original monitoring sites have been optimized by matter element analysis method. The atmospheric pollution situation of Taiyuan can be detected accurately after the number of monitoring sites was optimized from eight to five.

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“…Over the last decades, eutrophication has become problematic in many freshwater lakes in China as a result of massive nutrients loads, and the rapid expansion of aquaculture activities in the lake ecosystems has greatly accelerated this process (Talbot & Hole, ; Wang, Fu, Qiao, & Liu, ; Zhang et al, ). Polyculture, as a sustainable activity, can not only improve performance of aquaculture species but also minimize waste in aquaculture environments (Aghuzbeni, Hajirezaee, Matinfar, Khara, & Ghobadi, ; Tian et al, ).…”

Section: Introductionmentioning

confidence: 99%

Impact of polyculture ecosystems of Ctenopharyngodon idellus with Eriocheir sinensis on bacterial communities in the sediments of Dongping Lake in China: Focus on optimization of polyculture modes

et al. 2019

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This study investigated the influence of polyculture ecosystems of grass carp (Ctenopharyngodon idellus) and Chinese mitten crab (Eriocheir sinensis) on the bacterial community of sediments in the Lake Dongping in China, using the Illumina HiSeq Sequencing approach. The bacterial community diversity was reduced to different extent due to the polyculture of animals. The bacterial community composition changed significantly among the ecosystems of control (without any animals cultured), G1C1 (with the highest animal biomass: C. idellus, 2 ind/m2; E. sinensis, 1 ind/m2) and G2C2 (with the lowest biomass: C. idellus, 1 ind/m2; E. sinensis, 0.5 ind/m2). Relative abundance increase for sulphide‐oxidizing bacteria and decrease for sulphate‐reducing bacteria were detected with more quantities of fish–crab cultured in ecosystems. Variations in the concentration of sediment sulphate mainly accounted for the shifts of both the bacterial diversity and community composition. Lastly, G2C2 was recommended as the optimal polyculture ecosystem that could be used in the Lake. The results suggested negative impacts of polyculture ecosystems of C. idellus with E. sinensis on the bacterial diversity but positive impacts on the community composition and indicated the role of total biomass of animas in shaping the bacterial community in the sediments of lake ecosystems.

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Impact of aquaculture on eutrophication in Changshou Reservoir

Cited by 21 publications

References 3 publications

Internal Forces and Steel Arrangement Analysis on the Steel Lined Reinforced Concrete Penstocks

Internal Forces and Steel Arrangement Analysis on the Steel Lined Reinforced Concrete Penstocks

Mathematical Optimization of Monitoring Stations for Atmospheric Environment in Taiyuan City, Shanxi Province, China

Impact of polyculture ecosystems of Ctenopharyngodon idellus with Eriocheir sinensis on bacterial communities in the sediments of Dongping Lake in China: Focus on optimization of polyculture modes

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