Optimized Microcystis Prediction Model Using EFDC-NIER and LH-OAT Method

Ahn, Jung Min; Kim, Jungwook; Kwak, Sunghyun; Kang, Tae-Gu

doi:10.1007/s12205-023-1886-y

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…In this study, the SUFI-2 algorithm (Khalid et al, 2016) was used to investigate SWAT module sensitivity and uncertainty. Sensitivity analysis performed with the Latin Hypercube One-factor-at-a-Time (LH-OAT) sampling approach (Ahn et al, 2023) was used to identify the most influential model parameters for simulating the observed data. It gives two types of results, the value of statistics "t", and the level of significance "p".…”

Section: Analysed Areamentioning

confidence: 99%

Spatial and Temporal Changes in Nutrient Source Contribution in a Lowland Catchment within the Baltic Sea Region under Climate Change Scenarios

Bojanowski

Orlińska-Woźniak

Wilk

et al. 2023

Preprint

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Currently, climate change is considered as an important factor affecting nutrient loads introduced through riverine systems into the Baltic Sea. Although the prospect of a large increase in pollution has long seemed very real, it still does not translate into planning of effective remedial actions. One of the factors limiting the development of such activities is the scale of simulations, focusing generally on catchment outlet profiles. To fill this gap and enable a step forward in understanding responses towards future predictions in a higher resolution scale (subcatchment), we assessed nutrient load contribution using calculation profiles localised along a main watercourse and its tributaries. To track spatial and seasonal changes of total nitrogen and phosphorus under short- and long-term (RCP4.5 and RCP8.5) climate change scenarios we used the digital platform Macromodel DNS/SWAT. Having at our disposal a catchment model with a good performance we could follow not only total load changes in particular subcatchments, but also track localisation of the pollution sources and their direct impact on load estimations. Our results showed an increase of the loads, especially from the agricultural landuse type, up to 34% for TN and 85% for TP in the most extreme scenario. Moreover, forest areas have been noted as highly reactive to the climate changes, and through their localisation able to distinctly alter nutrient outflow. Finally, the contribution of urban areas should be further investigated since the dynamics of nitrogen and phosphorus release from impervious surfaces is noticeably different here than from the other diffuse sources.

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Section: Analysed Areamentioning

confidence: 99%

Spatial and Temporal Changes in Nutrient Source Contribution in a Lowland Catchment within the Baltic Sea Region under Climate Change Scenarios

Bojanowski

Orlińska-Woźniak

Wilk

et al. 2023

Preprint

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“…In this study, we used the EFDC-NIER model as the modeling framework, revised in 2010 by the National Institute of Environmental Research (NIER), to add additional functionalities for simulating hydraulic structures and algal blooms [35]. Previous case studies have reported on the analysis of flow dynamics characteristics according to changes in estuary and multifunctional weir operating conditions, and their impact on water quality and algal bloom phenomena in South Korea, using the EFDC-NIER model [36][37][38][39][40][41][42].…”

Section: Occurrences Of 2-mib and Flushing Events In 2018mentioning

confidence: 99%

Managing the Taste and Odor Compound 2-MIB in a River-Reservoir System, South Korea

Kang,

Kim,

Park

et al. 2023

Water

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High concentrations of 2-methylisoborneol (2-MIB) were reported during winter in the Paldang reservoir and North Han River, South Korea. The causes of the unusual taste and odor problems in the regulated river-reservoir system were not understood; however, a short-term solution is to flush out 2-MIB-rich water to secure water sources for over 20 million people. Approximately 150 million tons of water was released from upstream dams for 12 days (late November to early December 2018) to reduce the elevated levels of 2-MIB. Simultaneously, the spatio-temporal variations of the measured concentration of sample 2-MIB from five sites were simulated using a multi-dimensional hydrodynamics-based solute transport model to monitor the flushing effect. A modified environmental fluid dynamics code (EFDC) was adopted as the primary model framework. Five scenarios on the kinetic constants related to the characteristics of 2-MIB transport and behavior, such as conservative, net decay, and net production, were applied, and the results were compared. We found that the simulation errors on the elapsed times to satisfy the Korean drinking water monitoring standard (≤20 ngL−1) were smallest with the conservative dye transport option, indicating that the physical and biochemical characteristics of 2-MIB may not play an essential role.

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Harmful Cyanobacterial Blooms forecasting based on improved CNN-Transformer and Temporal Fusion Transformer

Ahn

Kim

et al. 2023

Environmental Technology & Innovation

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Optimized Microcystis Prediction Model Using EFDC-NIER and LH-OAT Method

Cited by 4 publications

References 33 publications

Spatial and Temporal Changes in Nutrient Source Contribution in a Lowland Catchment within the Baltic Sea Region under Climate Change Scenarios

Spatial and Temporal Changes in Nutrient Source Contribution in a Lowland Catchment within the Baltic Sea Region under Climate Change Scenarios

Managing the Taste and Odor Compound 2-MIB in a River-Reservoir System, South Korea

Harmful Cyanobacterial Blooms forecasting based on improved CNN-Transformer and Temporal Fusion Transformer

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