EFDC simulation of fishway in the Diversion Dahaerteng River to Danghe Reservoir, China

Song, Weiwei; Xu, Qian; Fu, Xingqian; Wang, Changfangzi; Pang, Yong; Song, Dahao

doi:10.1016/j.ecolind.2019.03.025

Cited by 19 publications

(6 citation statements)

References 52 publications

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“…A nature-like fishway is a broad term for several styles of structures such as bottom ramps and slopes, bypass channels and fish ramps, with the chosen construction material corresponding to what is usually present in rivers under natural conditions. Compared with traditional technical fishways, the flow conditions in nature-like fishways tend to be more diversified, providing both fish passage and habitat for a variety of aquatic organisms [ 29 , 30 , 31 , 32 ]. The nature-like fishway optimizes the construction material and structure form ecologically, pays more attention to the overall coordination with the surrounding environment, and can form an ecological-landscape corridor [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Wang

Zhu

et al. 2022

IJERPH

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Many uncertainties such as variable irregular structure and complex flow conditions bring difficulties to the design of a nature-like fishway. This study defines the main factors and parameters affecting flow conditions such as permeability ratio, offset ratio, bottom slope and pool length to simplify and generalize the irregular geometry of the nature-like fishway. According to the engineering requirements of the Mopiling nature-like fishway, the effect of the above parameters of pool geometry on the flow structure is investigated through a 3D turbulent numerical simulation, and the parameter thresholds are summarized according to the optimization of the flow conditions. The results show that under the same conditions, the maximum velocity of the control section increases with the increase in permeability ratio, bottom slope and pool length, and the offset ratio has limited effect on the maximum velocity of the control section. It is recommended that when the bottom slope is 1/250 and the pool length is 10 m, the permeability ratio should not be greater than 0.30 and the offset ratio should be located between 0.15 and 0.60. When the bottom slope is adjusted to 1/200, it is recommended to control the permeability ratio below 0.20, the offset ratio between 0.30 and 0.60, and the pool length can be adjusted to 8 m. Within the above threshold range of the design parameters, the maximum velocity in the fishway can be basically controlled at about 1.0 m/s. The mainstream in the pool is clear and the flow pattern is good, which can basically satisfy the requirements of fish passing. The relevant design parameters and optimization strategies can provide reference for similar projects.

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Section: Introductionmentioning

confidence: 99%

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Wang

Zhu

et al. 2022

IJERPH

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“…In the past decade, EFDC has been extensively used to predict algal bloom in lakes, rivers, and reservoirs as well as in urban constructed ponds [31][32][33][34][35][36][37][38]. For example, the lower section of the Han River in South Korea experienced a severe algal bloom in 2015, and EFDC was used to understand algal dynamics in this system.…”

Section: -D Modelmentioning

confidence: 99%

One- and Three-Dimensional Hydrodynamic, Water Temperature, and Dissolved Oxygen Modeling Comparison

Tasnim,

Fang,

Hayworth

2024

Water

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Understanding and modeling water quality in a lake/reservoir is important to the effective management of aquatic ecosystems. The advantages and disadvantages of different water quality models make it challenging to choose the most suitable model; however, direct comparison of 1-D and 3-D models for lake water quality modeling can reveal their relative performance and enable modelers and lake managers to make informed decisions. In this study, we compared the 1-D model MINLAKE and the 3-D model EFDC+ for water temperature, ice cover, and dissolved oxygen (DO) simulation in three Minnesota lakes (50-m Carlos Lake, 23.5-m Trout Lake, and 5.6-m Pearl Lake). EFDC+ performed well for water temperature and DO simulation in the open water seasons with an average root mean square error (RMSE) of 1.32 °C and 1.48 mg/L, respectively. After analyzing the ice thickness with relevant data, it was found that EFDC+ calculates a shorter ice cover period and smaller ice thickness. EFDC+ does not consider snowfall for ice thickness simulation. The results also revealed that EFDC+ considers spatial variance and allows the user to select inflow/outflow locations precisely. This is important for large lakes with complex bathymetry or lakes having multiple inlets and outlets. MINLAKE is computationally less intensive than EFDC+, allowing rapid simulation of water quality parameters over many years under a variety of climate scenarios.

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“…At present, the commonly used water quality model software includes MIKE21, EFDC, QUALE2E and so on. Scholars have used MIKE21 to predict the water environment of Puzhe River, Hei River, and Malian River [7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Prediction and Analysis of Water Environment Elements Evolution Law of Water Diversion System from Hanjiang to Weihe River Project

Chen,

Wu,

et al. 2023

Advances in Transdisciplinary Engineering

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In this study, in order to reveal the hydrodynamic characteristics and water quality evolution law of Water Diversion System from Hanjiang to Weihe River project Huangjinxia and Sanhekou reservoirs in the water source area and the tunnels in the water transmission area were selected. By using MIKE software to establish a hydrodynamic and water quality mathematical model, the topological structure of the water transfer system was analyzed, the hydrodynamic conditions and pollutant migration and transformation process of the study area were simulated, and the hydrodynamic characteristics of the system and the evolution law of water quality were revealed. The results are as follows. (1) The hydrodynamic simulation results show that the different typical annual average velocity in the Huangjinxia reservoir area decreases from 0.173m/s at the end of the reservoir to 0.025m/s at the front of the dam, showing a decreasing trend. The inlet velocity of the Huangsan section of the tunnel is 0.959m/s, and the velocity increases to 1.590m/s when the inflow into the Sanhekou water source area. (2) From the distribution characteristics of NH3-N, COD and TN concentrations, it can be seen that the water quality of the water transfer system has improved along the water transfer route, from the end of Huangjinxia reservoir to the exit of the water transfer tunnel. The average annual concentrations of NH3-N, COD and TN decreased from 0.248, 11.211 and 2.308mg/L to 0.241, 11.059 and 2.076mg/L, respectively. Among them, after the inflow from Sanhekou reservoir area was collected at Sanhekou control sluice, the concentrations of NH3-N, COD and TN were reduced to 0.202, 9.966 and 1.215mg/L, respectively, and the water quality was significantly improved.

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EFDC simulation of fishway in the Diversion Dahaerteng River to Danghe Reservoir, China

Cited by 19 publications

References 52 publications

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

Effect of Parameters of Pool Geometry on Flow Structure in Nature-like Fishway

One- and Three-Dimensional Hydrodynamic, Water Temperature, and Dissolved Oxygen Modeling Comparison

Prediction and Analysis of Water Environment Elements Evolution Law of Water Diversion System from Hanjiang to Weihe River Project

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