Modeling Transit Flow Through Port Gates and Connecting Channel in Baltic Sea—Liepaja Port—Liepaja Lake System

Frishfelds, Vilnis; Seņņikovs, Juris; Bethers, Uldis; Murawski, Jens; Timuhins, Andrejs

doi:10.3389/fmars.2021.657721

Cited by 3 publications

(6 citation statements)

References 15 publications

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“…The oceanographic model on the transport of MPs is built based on the HBM which enables a seamless transition from ocean to estuary scales by using the dynamic two-way nesting (Murawski et al, 2021;Frishfelds et al, 2021) and the HBM-based MP dynamic module (Murawski et al, 2022), which includes three two-way nested domains, hereafter referred to as the threedomain model:…”

Section: Model Setup and Input Data Model Setupmentioning

confidence: 99%

“…HBM is a three-dimensional, free-surface, baroclinic ocean circulation model (Frishfelds et al, 2021;Murawski et al, 2021). The model code is efficient and highly parallelized both with OpenMP and MPI interfaces (Berg and Poulsen, 2012).…”

Section: Model Setup and Input Data Model Setupmentioning

confidence: 99%

“…The case with the standalone setup had the lowest correlation as it lacked two-way nesting with the Gulf of Riga despite having a higher resolution. The standalone setup did not describe momentary currents correctly at the boundaries (Frishfelds et al, 2021;Murawski et al, 2021). Therefore, proper boundary conditions can be more essential than the resolution of a coastal model, especially when estimating transport from inland waters to open seas.…”

Section: Hydrodynamic Simulation In Inland-estuarial-coastal Watersmentioning

confidence: 99%

“…The lack of model resolution in these regions can lead to inaccurate modeling on the estuarial-coastal MP exchange. It is quite often that a resolution up to tens of meters is required (Frishfelds et al, 2021). The recent development in seamless modeling has enabled a modeling capacity to resolve the LOAC system with flexible model grids (She and Murawski, 2018;Frishfelds et al, 2021;Murawski et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…It is quite often that a resolution up to tens of meters is required (Frishfelds et al, 2021). The recent development in seamless modeling has enabled a modeling capacity to resolve the LOAC system with flexible model grids (She and Murawski, 2018;Frishfelds et al, 2021;Murawski et al, 2022). For example, a 3D hydrodynamic model, the HIROMB-BOOS model (HBM), has been applied to riverine-estuarial-coastal-open sea modeling with multiple two-way nested domains (Frishfelds et al, 2021;Murawski et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Transport of Microplastics From the Daugava Estuary to the Open Sea

2022

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This study considers the transport of microplastics (MPs) from inland waters (rivers and lakes) to coastal waters and then to the open sea. A three-dimensional MP Eulerian tracer model based on the HIROMB-BOOS model (HBM) with wave-induced transport and biofouling process is used. Multilayer two-way nested model grids with 3–0.5–0.25–0.05 nautical mile resolutions are applied to resolve relevant riverine–estuarial–coastal hydrodynamics with a focus on the southern waters in the Gulf of Riga. The major river of the Gulf of Riga, Daugava, is governed by the Riga Hydro Power Station (RHPS) with high daily and weekly variability of the runoff creating more intense outflows during its working hours. This gives additional complexity when calibrating this model. The model results are validated against MP observations that are collected on various cruises in the summer of 2018 in the Gulf of Riga. There exists a strong synoptic variability in the observations, which are also reproduced. As the rivers are the primary source of MPs, a special backtracking algorithm was developed to find the most possible source of pollutants at a given location and time. The backtracking algorithm includes optimization with respect to salinity in order to prefer trajectories coming from freshwater and, consequently, MP sources. Lagrangian drift studies are performed for events with high precipitation in the estuary domain when sewer overflow at wastewater treatment plants (WWTPs) can occur, and the results are compared with different MP components in observations.

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Section: Model Setup and Input Data Model Setupmentioning

confidence: 99%

Section: Model Setup and Input Data Model Setupmentioning

confidence: 99%

Section: Hydrodynamic Simulation In Inland-estuarial-coastal Watersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transport of Microplastics From the Daugava Estuary to the Open Sea

2022

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Response of Hydrological Characteristics for Local Coastal Water Bodies of the South-Eastern Baltic to Extreme Weather Events in Autumn–Winter 2023/2024

Domnin,

Kileso,

Kulmanov

et al. 2024

Pure Appl. Geophys.

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SIMO v1.0: simplified model of the vertical temperature profile in a small, warm, monomictic lake

Šarović

Burić²,

Klaić³

2022

Geosci. Model Dev.

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Abstract. A simple 1-D energy budget model (SIMO) for the prediction of the vertical temperature profiles in small, monomictic lakes forced by a reduced number of input meteorological variables is proposed. The model estimates the net heat flux and thermal diffusion using only routinely measured hourly mean meteorological variables (namely, the air temperature, relative humidity, atmospheric pressure, wind speed, and precipitation), hourly mean ultraviolet B radiation (UVB), and climatological yearly mean temperature data. Except for the initial vertical temperature profile, the model does not use any lake-specific variables. The model performance was evaluated against lake temperatures measured continuously during an observational campaign in two lakes belonging to the Plitvice Lakes, Croatia (Lake 1 and Lake 12). Temperatures were measured at 15 and 16 depths ranging from 0.2 to 27 m in Lake 1 (maximum depth of 37.4 m) and 0.2 to 43 m in Lake 12 (maximum depth of 46 m). The model performance was evaluated for simulation lengths from 1 to 30 d. The model performed reasonably well, and it was able to satisfactorily reproduce the vertical temperature profile at the hourly scale, the deepening of the thermocline with time, and the annual variation in the vertical temperature profile, which shows its applicability for short-term prognostic simulations. A yearlong simulation initiated with an approximately constant vertical profile of the lake temperature (≈ 4 ∘C) was able to reproduce the onset of stratification and convective overturn. The epilimnion temperature was somewhat overestimated, especially with the onset of the convective overturn. The upper limit of the metalimnion was well captured, while its thickness was overestimated. Nevertheless, the values of the model performance measures obtained for a yearlong simulation were comparable with those reported for other, more complex models. Thus, the presented model can also be used for long-term simulations and the assessment of the onset and duration of lake stratification periods when water temperature data are unavailable, which can be useful for various lake studies performed in other scientific fields, such as biology, geochemistry, and sedimentology.

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Modeling Transit Flow Through Port Gates and Connecting Channel in Baltic Sea—Liepaja Port—Liepaja Lake System

Cited by 3 publications

References 15 publications

Transport of Microplastics From the Daugava Estuary to the Open Sea

Transport of Microplastics From the Daugava Estuary to the Open Sea

Response of Hydrological Characteristics for Local Coastal Water Bodies of the South-Eastern Baltic to Extreme Weather Events in Autumn–Winter 2023/2024

SIMO v1.0: simplified model of the vertical temperature profile in a small, warm, monomictic lake

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