3-D CFD simulations of hydrodynamics in the Sulejow dam reservoir

Abstract

This paper reports the processes by which a single-phase 3-D CFD model of hydrodynamics in a 17-km-long dam reservoir was developed, verified and tested. A simplified VOF model of flow was elaborated to determine the effect of wind on hydrodynamics in the lake. A hexahedral mesh with over 17 million elements and a k-ω SST turbulence model were defined for single-phase simulations in steady-state conditions. The model was verified on the basis of the extensive flow measurements (StreamPro ADCP, USA). Excellent agreement (average error of less than 10%) between computed and measured velocity profiles was found. The simulation results proved a strong effect of wind on hydrodynamics in the lake, especially on the development of the water circulation pattern in the lacustrine zone.

Assessment of the Chemical State of Bottom Sediments in the Eutrophied Dam Reservoir in Poland

“…of the Sulejów Reservoir, water flow is disturbed as illustrated in Figure 12. Research on flow hydrodynamics in the Sulejów Reservoir in 2015 [37] confirms, that when steady flow pattern develops in the basin, a large region of recirculation is formed bellow the outlet of the reservoir. Figure 12 shows the surface velocity field.…”

Continuous and Periodic Monitoring System of Surface Water Quality of an Impounding Reservoir: Sulejow Reservoir, Poland

“…Negative water balance caused limited surface runoff and decreased the concentrations of nutrient in reservoir waters.low nitrate and phosphate concentrations in the reservoir waters are not only caused by minor surface runoff in the analysed period, but also by a strong eutrophication and algal blooms. The spatial distribution and dynamics of changes in the concentration of biogenic substances show that higher concentrations were measured in the tributary rivers (Pilica and Luciaza).Blue-green algae occur mainly in the area of the high depths, lower flow rate and places of water stagnation, which favour the algae growth [14]. In contrast to the BGA, concentrations of chlorophyll “a” are higher in the shallower part of the reservoir.Concentrations of TOC, COD as a measure of organic matter content in waters, randomly exceed the standards for the 2nd class of water purity.Higher concentrations of BOD in the reservoir in comparison to the supplying rivers, recorded in 2016, were associated with active tourism in the summer season.Analysis of spatial distribution of biogenic substances in the reservoir shows significant differences in different parts of the lake, which means that single, stationary measurements do not deliver a realistic picture of the contaminants flow in the dam reservoirs.…”

“…Blue-green algae occur mainly in the area of the high depths, lower flow rate and places of water stagnation, which favour the algae growth [14]. In contrast to the BGA, concentrations of chlorophyll “a” are higher in the shallower part of the reservoir.…”

Hazards associated with municipal waste storage. Vol. I

“…After extraction, the organic layer was separated and the samples were extracted again with dichloromethane (10 cm 3 dichloromethane /200 cm 3 sample) [29][30][31]. Due to the formation of emulsions, the separation of the aqueous and organic phase was slow, centrifugation was carried out (2,500 x g, 10 min) to fully separate the phases [32][33][34][35]. The organic fraction was concentrated (ca.…”