An Analysis of Runoff Mitigation Effect Using SWMM-LID Model for Frequently Inundated Basin

Shin, Dong Soo; Park, Jae Beom; Kang, Doo Kee; Jo, Deok Jun

doi:10.9798/kosham.2013.13.4.303

Cited by 13 publications

(5 citation statements)

References 1 publication

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“…The developed optimal model has been simulated, and it has determined the positions according to the different numbers of the facilities which need to be installed. In Shin et al study, applicable LID techniques are analyzed and implemented using LID modules of the Storm Water Management Model (SWMM), which is the model for urban stormwater-runoff management in the project area [5]. The 1D and 2D hydraulic modeling with HEC-RAS has been done by Brunner et al [6].…”

Section: Influence Of External Water Level Of the Han Rivermentioning

confidence: 99%

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

Choo

Park²,

Kim³

2022

Water

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In recent years, the frequency of flooding damage has increased owing to torrential rains caused by abnormal weather and rising sea levels, which can be attributed to global warming. In particular, in the case of low-tide rivers, when a high tide and critical rainfall occur simultaneously, the flood damage will increase due to the increased external water level. The establishment of a disaster prevention plan through a simulation of existing inequality streams may be suitable for general rivers; however, it is inadequate for considering the effects of tide changes over time, such as those in a reduced tide stream. Therefore, in this study, an optimal operation plan is formulated based on unsteady flow simulations in regions where a large number of hydraulic facilities are installed, and an optimal river management plan is derived for the flood season. For the Ara Waterway (Ara Stream) and Gulpo Stream managed by the Korea Water Resources Corporation, various hydraulic facilities (weir, inverted syphon, etc.) are operated in conjunction with the West Sea to mitigate the continuous flood damage. In that context, a West Sea drainage gate has been installed. Correspondingly, it is necessary to optimize the flood exclusion capacity by deriving an optimal operation plan because it directly affects the water level in hydraulic facilities such as the Right No. 1, Left No. 1, and flood gates, which are the most important drainage structures for the Gulpo Stream operation. Herein, through a trial-and-error method, an optimal operation plan is derived to reduce the flood frequency in the Ara Waterway and Gulpo Stream.

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Section: Influence Of External Water Level Of the Han Rivermentioning

confidence: 99%

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

Choo

Park²,

Kim³

2022

Water

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“…Effect analysis techniques include calculation through numerical modeling, spatial information analysis, and the convergence of remote sensing data and artificial intelligence technology [17][18][19][20][21]. The use of numerical models, such as watershed models, makes it possible to quantitatively simulate discharge and water quality changes before and after LID and GI application [22][23][24]. The water cycle improvement effect can be evaluated through the analysis of spatial information, such as cadastral maps and land use maps.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Non-Point Source (NPS) Management on Non-Point Source Reduction and Water Cycle Improvement in an Urban Area

Kim,

Lee,

Park

et al. 2024

Sustainability

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Suwon, the capital and largest city of Gyeonggi-do, South Korea, was designated as a non-point source management area in 2010. The management period ended in 2020, so follow-up measures are needed. In this study, we investigated several projects implemented in Suwon for urban water cycle improvement and non-point source pollution reduction, and the long-term management effects were analyzed to suggest policy directions such as the revision of designation notices. During the 10-year management period in Suwon, the population and lot area continued to increase, and the non-point source-based annual Biochemical Oxygen Demand (BOD) discharge loads also increased by approximately 25% at the half sub-basins Hwangguji-cheon and Woncheonri-cheon in 2020 compared to 2010. Even under these conditions, statistical analyses show that the Biochemical Oxygen Demand (BOD) and Total Phosphorus (TP) concentrations monitored at the outlet of basin were decreased due to the promotion of a large-scale sewer management project as well as non-point source pollution reduction projects. Also, the field monitoring data-based Load Duration Curve (LDC) analysis results indicate that the loads decreased in the high-flow period of 2020 compared to 2015. Also, the Normalized Difference Vegetation Index (NDVI) values calculated using satellite images since 2017 tended to increase slightly during the period when the impervious area estimated using the land registration map increased. It is assumed that using the current calculation method for impervious areas has limitations regarding its ability to reflect changes in the small-scale Low-Impact Development (LID) facility and in ecological/landscape areas. On the other hand, the annual variation in direct runoff estimated at the outlet using three hydrograph separation methods did not show any improvement with regard to storm water retention during the management period. These results reveal that the effects on urban water cycle improvement, such as peak flow reduction and base flow increase, may not be noticeable despite some progress in reducing non-point source pollution and increasing green area. Therefore, additional efforts directed towards non-point source pollution management focused on water cycle improvement are required in the city, especially in the sub-basins with higher pollution loads such as Hwangguji-cheon and Seoho-cheon.

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“…Bai et al [10] applied LID (infiltration, storage types) in Suqian City, Jiangsu Province, from which the surface runoff rate was assessed to be high in the infiltration type. Shin et al [11] and Lee et al [12] designated priority management regions for reducing combined sewer overflow (CSO) emissions during rainfall and non-point source pollutants occurring from residential and industrial areas in Suyeong-gang River, Busan City, and analyzed the runoff mitigation effect using the LID approach. Zhang et al [13] and Bhandari et al [14] analyzed the flood mitigation effects through the application of LID considering the groundwater in the states of Washington and Maryland in the United States.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of SWMM-LID Modeling Applicability Considering Regional Characteristics for Optimal Management of Non-Point Pollutant Sources

et al. 2022

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Urbanization and climate change have deteriorated the runoff water circulation and quality in urban areas worldwide. Consequently, low-impact development (LID) and green infrastructure (GI) techniques have been applied to manage impermeable land and non-point source pollutants. Herein, the impacts of urban characteristics, sewer system type, and precipitation intensity on surface runoff were analyzed using the Storm Water Management Model (SWMM) to derive an effective water circulation strategy for urban and complex areas through the optimal allocation of LID/GI strategies. The runoff rates were estimated to be 77.9%, 37.8%, and 61.7% for urban areas with separated and combined sewer systems and complex areas with combined sewer systems, respectively. During low rainfall, runoff was intercepted in areas with combined sewer systems, and runoff and pollutant load were lower than that in areas with separated sewer system. In contrast, wastewater was diluted during heavy rainfall; however, the total pollutant load was higher than in separated areas. The analysis of scenarios according to the regional distribution of each LID type resulted in high efficiency when combined sewers were applied during the distributed placement of catchment areas. Additionally, LID infrastructure was applied in areas with separated sewers when the placement was concentrated at the end of the basin.

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An Analysis of Runoff Mitigation Effect Using SWMM-LID Model for Frequently Inundated Basin

Cited by 13 publications

References 1 publication

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

Deriving an Optimal Operation Plan for Hydraulic Facilities with Complex Channels through Unsteady Flow Simulations

The Impact of Non-Point Source (NPS) Management on Non-Point Source Reduction and Water Cycle Improvement in an Urban Area

Evaluation of SWMM-LID Modeling Applicability Considering Regional Characteristics for Optimal Management of Non-Point Pollutant Sources

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