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Yan Lu
State key laboratory of Hydrology-Water Resource and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China

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Journal article
Published: 31 August 2019 in Water
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As a typical waterway modification, the spur dike narrows the water cross section, which increases the flow velocity and flushes the riverbed. Meanwhile, it also protects ecological diversity and improves river habitat. Different types of spur dikes could greatly impact the interaction between flow structure and local geomorphology, which in turn affects the evolution of river aquatic habitats. Four different types of spur dikes—including rock-fill, permeable, w-shaped rock-fill, and w-shaped permeable—were evaluated using flume experiments for spur dike hydrodynamics and fish aggregation effects. Based on Shannon’s entropy, an index for calculating water flow diversity is proposed. Additionally, the impact of the different spur dikes on water flow diversity and the relationship between water flow diversity and fish aggregation effects were studied. The water flow diversity index around the spur dike varied from 1.13 to 2.96. The average aggregation rate of test fish around the spur dike was 5% to 28%, and the attraction effect increased with increasing water flow diversity. Furthermore, we plotted the relationship between water flow diversity index and average fish aggregation rate. A fish hydroacoustic study conducted on the Laohutan fish-bone dike in the Dongliu reach of downstream Yangtze River showed that the fish aggregation effect of the permeable spur dike was greater than the rock-fill spur dike. These research results could provide theoretical support for habitat heterogeneity research and ecologically optimal design of spur dikes.

ACS Style

Tingjie Huang; Yan Lu; Huaixiang Liu. Effects of Spur Dikes on Water Flow Diversity and Fish Aggregation. Water 2019, 11, 1822 .

AMA Style

Tingjie Huang, Yan Lu, Huaixiang Liu. Effects of Spur Dikes on Water Flow Diversity and Fish Aggregation. Water. 2019; 11 (9):1822.

Chicago/Turabian Style

Tingjie Huang; Yan Lu; Huaixiang Liu. 2019. "Effects of Spur Dikes on Water Flow Diversity and Fish Aggregation." Water 11, no. 9: 1822.

Correspondence
Published: 24 May 2018 in Ecological Indicators
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ACS Style

XiaoMing Jiang; Zhiwei Sun; BaoQiang Wang; Baozhu Pan; Yan Lu. The underestimated effectiveness of family-level surrogates of rotifer assemblages due to incorrect taxonomy: A comment on Xiong et al. (2018). Ecological Indicators 2018, 96, 750 -752.

AMA Style

XiaoMing Jiang, Zhiwei Sun, BaoQiang Wang, Baozhu Pan, Yan Lu. The underestimated effectiveness of family-level surrogates of rotifer assemblages due to incorrect taxonomy: A comment on Xiong et al. (2018). Ecological Indicators. 2018; 96 ():750-752.

Chicago/Turabian Style

XiaoMing Jiang; Zhiwei Sun; BaoQiang Wang; Baozhu Pan; Yan Lu. 2018. "The underestimated effectiveness of family-level surrogates of rotifer assemblages due to incorrect taxonomy: A comment on Xiong et al. (2018)." Ecological Indicators 96, no. : 750-752.

Journal article
Published: 12 February 2018 in Journal of Applied Ichthyology
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Length-weight relationships (LWRs) were estimated for three small indigenous fish species, (Sinogastromyzon szechuanensis, Sinogastromyzon sichangensis and Sinocrossocheilus labiatus) in the upper Yangtze River, China. Samples were collected using three types of local traditional fishing gears, including gill nets (mesh size: 1 cm), fish cages (mesh size: 0.5 cm), and electrofishing techniques (CWB-2000 P, 12V, 250 Hz), in April, July and October 2013 and 2014, and April and October 2016. The sample size for each species were gathered separately, with 100 for S. szechuanensis, 381 for S. sichangensis and 49 for S. labiatus from National Nature Reserve for rare and endemic fishes of the upper Yangtze River, China. The length-weight relationship parameter values of b were calculated as 2.986 for S. szechuanensis (b: 2.854–3.118), and 3.284 for S. sichangensis (b: 3.209–3.359) and 3.119 for S. labiatus (b: 2.911–3.326). The primary data will be meaningful for further research about sustainable development and scientific management of fishery resources of the upper Yangtze River.

ACS Style

J. Wang; X. M. Jiang; B. Z. Pan; Y. Lu. Length-weight relationships of three indigenous fish species from National Nature Reserve for Rare and Endemic Fishes of the upper Yangtze River, China. Journal of Applied Ichthyology 2018, 34, 1014 -1016.

AMA Style

J. Wang, X. M. Jiang, B. Z. Pan, Y. Lu. Length-weight relationships of three indigenous fish species from National Nature Reserve for Rare and Endemic Fishes of the upper Yangtze River, China. Journal of Applied Ichthyology. 2018; 34 (4):1014-1016.

Chicago/Turabian Style

J. Wang; X. M. Jiang; B. Z. Pan; Y. Lu. 2018. "Length-weight relationships of three indigenous fish species from National Nature Reserve for Rare and Endemic Fishes of the upper Yangtze River, China." Journal of Applied Ichthyology 34, no. 4: 1014-1016.

Research papers
Published: 01 September 2007 in Journal of Hydraulic Research
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This experimental study investigates how suction affects turbulence flow over an immobile, two-dimensional triangular dune. A Laser Doppler Anemometer is used to measure the streamwise and vertical components of velocity over one dune length for three different suction rates at 0, 0.29% and 0.45%, respectively. The response of the mean flow and turbulence velocities to bed suction is explored in both a local sense, through comparison of the time-average velocity, rms values of velocity fluctuations and Reynolds shear stress profiles at five selected sections; and a spatial sense, by producing a set of contour plots over the dune length for all mean and turbulence parameters. The measurements reveal that suction causes the flow to adhere to the bed resulting in reduction of the separation length. The streamwise velocity profile becomes more uniform when compared to that without suction while suction always produces smaller or more negative vertical velocities in the near-bed region. The measurements also show that both the near-bed turbulence intensity and Reynolds shear stresses decrease with suction, which confirms that suction causes the flow within the boundary layer to be less turbulent. An interesting observation is that the flow does not respond to suction in the circulation zone just downstream of the dune crest.

ACS Style

Yan Lu; Yee-Meng Chiew. Suction effects on turbulence flows over a dune bed. Journal of Hydraulic Research 2007, 45, 691 -700.

AMA Style

Yan Lu, Yee-Meng Chiew. Suction effects on turbulence flows over a dune bed. Journal of Hydraulic Research. 2007; 45 (5):691-700.

Chicago/Turabian Style

Yan Lu; Yee-Meng Chiew. 2007. "Suction effects on turbulence flows over a dune bed." Journal of Hydraulic Research 45, no. 5: 691-700.