Urban Drainage System Improvement for Climate Change Adaptation

Kang, Narae; Kim, Soojun; Kim, Yonsoo; Noh, Huiseong; Hong, Seongbin; Kim, Hung Soo

doi:10.3390/w8070268

Cited by 42 publications

(24 citation statements)

References 31 publications

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“…Rounded and tangential transitions between the upper water body and the culvert had the biggest positive impact on the flows for any degree of misalignment. These methods increase the flow capacity while also decreasing the likelihood of blockage and reducing sedimentation and erosion processes due to less vorticity upstream and a more uniform velocity distribution [2].…”

Section: Discussionmentioning

confidence: 99%

“…Perpendicular crossings between transport infrastructure and natural streams are favored when installing new culverts, but this is not always possible as natural creeks meander through the landscape. Maintaining a perpendicular intersection and not aligning the culvert with the main flow direction leads to reduced flows, higher blockage risks [1][2][3], and sedimentation and erosion [4][5][6]. Today, three different methods are used to approach this problem; skewed barrels, upstream realignments, or misaligned structures.…”

Section: Introductionmentioning

confidence: 99%

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Improving Flows in Misaligned Culverts

Jaeger

Jacobs

Tondera

et al. 2019

Water

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This study investigated different approaches to optimize flows in misaligned culverts. Structures aligned with the natural stream are always preferred, as misalignments cause a change of direction at the culvert inlet associated with lower performance and sedimentation and erosion problems. This optimal positioning can cause high financial costs and a flow optimization minimizing the associated problems could be a viable alternative. In this study, we used computational fluid dynamics analysis to evaluate the flow in 44 different scenarios with misalignment angles ranging from 0 • to 90 • . It was found that smooth transitions towards the narrowest point in the stream (culvert) were possible for any degree of misalignment resulting in improved, uniform velocity distributions and less turbulence. An experimental setup was able to confirm the possible flow improvements. The proposed approach of flow redirection can lower construction costs and gives planners and designers more flexibility as tailored reinforcement and redesign of the stream embankment can be used as an alternative to costly creek alignments.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving Flows in Misaligned Culverts

Jaeger

Jacobs

Tondera

et al. 2019

Water

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“…The frequency of urban water disasters caused by heavy rain or continuous rainfall can be reduced to lower design rainfall return periods by improving the capacity of inadequate urban drainage facilities [36]. Flooding associated with return period exceeds the storm sewer capacity which is different from what is needed for drainage water; this puts emphasis on utilizing a variety of measures to cope with rainstorm of a great return period.…”

Section: The City Flood Prevention Abilitymentioning

confidence: 99%

Objectives and Indexes for Implementation of Sponge Cities—A Case Study of Changzhou City, China

Dong

Wong

et al. 2018

Water

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This paper presents a framework of objectives and indexes for sponge cities implementation in China. The proposed objectives and indexes aims to reflect whether the city is in accord with the sponge city. Different cities have different objectives and indexes as each city has its own geologic and hydrogeological conditions. Therefore, the main problems (e.g., water security and flood risks) in the central urban area of Changzhou city, China were evaluated scientifically. According to the local conditions, four objectives and eleven indexes have been made as a standard to estimate the sponge city and set a goal for the city development to reach the goal of sustainable urban development. The strategy of process control was implemented to improve the standard of urban drainage and flood control facilities, regulate total runoff and reduce storm peak flow, and the ecological monitoring of the function of the rivers and lakes. The objectives of sponge cities include water security, water quality improvement, healthy water ecosystems, and water utilization efficiency. Urban flood prevention capacity, river and lake water quality compliance, and annual runoff control are the key objectives to encourage the use of non-conventional water resources.

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“…Considerable effort has been devoted to considering scenario(s) in the water resources engineering domain such as the following: evolution of land use and impact assessment [1][2][3][4][5][6][7][8][9][10], water distribution system (WDS) design [11,12], watershed management [13,14], water resources management in natural river basins [15], and UDS design [16][17][18][19]. The focus of these studies was to obtain the most feasible 2 of 17 solution for the most probable scenario.…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 2020, 10, 1834 2 of 16 management in natural river basins [15], and UDS design [16][17][18][19]. The focus of these studies was to obtain the most feasible solution for the most probable scenario.…”

Section: Introductionmentioning

confidence: 99%

Development of a Multiscenario Planning Approach for Urban Drainage Systems

2020

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A traditional urban drainage system (UDS) planning approach generally considers the most probable future rainfall scenario. However, this single scenario (i.e., scenario-optimal) planning approach is prone to failure under recent climatic conditions, which involve increasing levels of uncertainty. To overcome this limitation, an alternative is to consider multiple scenarios simultaneously. A two-phase multi-scenario-based UDS planning approach was developed. Scenario-optimal solutions were determined for a set of scenarios in Phase I, as the traditional planning approach, while common elements across the scenarios were identified and used to consider components-wise regret cost concept for Phase II optimization, from which a compromise solution was sought. The storm water management model was dynamically linked with the harmony search algorithm for each phase optimization model. The proposed approach was demonstrated in the planning of the grid-type drainage networks of S-city. The compromise solution was compared with the scenario-optimal solutions (Phase I) with respect to cost effectiveness and system performance under scenarios that were not considered in the planning phase. of 17where X i * is scenario-optimal solution in scenario i, obtained from Phase I and X comp is the potential compromise solution generated by Phase II.The overpayments and supplementary payments were computed by comparing the nth components (links or nodes) of X i * and X comp . Study NetworkThe simple grid network is a section of a representative flooding area in S-city, South Korea ( Figure 5) and was used to develop the proposed model. The discharge and flow of the urban drainage network was determined by gravity only in the study network (i.e., the no-pump condition). The S-city network consisted of 15 nodes, 15 potential links, and one outlet. Appl. Sci. 2020, 10, 1834 where X i * is scenario-optimal solution in scenario i, obtained from Phase I and X comp is the potential compromise solution generated by Phase II. The overpayments and supplementary payments were computed by comparing the nth components (links or nodes) of X i * and X comp . Study NetworkThe simple grid network is a section of a representative flooding area in S-city, South Korea ( Figure 5) and was used to develop the proposed model. The discharge and flow of the urban drainage network was determined by gravity only in the study network (i.e., the no-pump condition). The S-city network consisted of 15 nodes, 15 potential links, and one outlet.

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Urban Drainage System Improvement for Climate Change Adaptation

Cited by 42 publications

References 31 publications

Improving Flows in Misaligned Culverts

Improving Flows in Misaligned Culverts

Objectives and Indexes for Implementation of Sponge Cities—A Case Study of Changzhou City, China

Development of a Multiscenario Planning Approach for Urban Drainage Systems

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