Flood mitigation and nutrient reduction benefits of flood control wetlands

2021 ◽  
Author(s):  
Ashley J Knudson
Keyword(s):  
Flood Control ◽  
Flood Mitigation ◽  
Nutrient Reduction

scholarly journals Approach to Mitigation of Territory Inundation with Help of Flood Control by Small Water Reservoirs

10.29007/hjpt ◽  
2018 ◽  
Author(s):  
Vitaly Ilinich ◽  
Aleksey Perminov ◽  
Olga Rukhovich ◽  
Anna Naumova
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Water Reservoir ◽  
River System ◽  
Flood Mitigation ◽  
Water Reservoirs ◽  
Hydraulic Flow ◽  
Small Water ◽  
Flow Capacity ◽  
Flood Hydrograph

The research dedicated to modeling of flood mitigation on the river basin with help of simulation of flood control by virtual small water reservoirs located in different places of the river system. Such problem decided with help of modeling of flood hydrograph and its routing through water reservoir on the base GIS. Reducing the degree of flooding should occur due to the limited hydraulic flow capacity of the water flow by dam spillways without flood control by people. The offered model is represented on the example of concrete river basin. Results have showed relevance of the model for flood mitigation on the river basin.

scholarly journals Floodplain Inhabitation: A Socio-Spatial Resilience Network

2021 ◽  
Author(s):  
◽  
Rebecca Boyle
Keyword(s):  
Flood Control ◽  
New South ◽  
Regional Scale ◽  
New South Wales ◽  
City Council ◽  
Flood Mitigation ◽  
Ecological Resilience ◽  
Population Increase ◽  
Spatial Resilience ◽  
South Wales

<p>The inadequacy of current approaches to managing floodplain inhabitation was highlighted in the 2010-11 Queensland, northern New South Wales and Victorian floods; the most costly floods in Australia’s history. Despite technological advancements and the prevalence of flood mitigation infrastructure, floods continue to have widespread adverse physical, social, economic, and emotional impacts. This situation is mirrored internationally and is anticipated to worsen as scientists predict an increase in the severity and prevalence of natural disasters such as flooding. In response to this, management of floodplain inhabitation must shift from flood prevention to adaptation. Adaptation is a key term in ecological resilience, defined as the capacity of a system to adapt and persist in the face of disturbance (Holling 1976). Hendstra et al (2004) suggests that in the context of disaster-resilient cities, resilience can be defined as the “capacity to adapt to stress from hazards and the ability to recover quickly from their impacts” (Henstra, Kovacs, McBean, & Sweeting, 2004, p. 5). Analysis of ecosystems reveals that interdependence across scales, variety, redundancy, adaptability and feedback are the key resilience principles enabling the system to adapt and maintain stability during flooding. At present there is a sparsity of literature exploring spatial resilience approaches to improving floodplain inhabitation. Whilst amphibious approaches improve individual resilience, there is a lack of innovative solutions to improve community and city resilience to flooding. Resilience approaches have the potential to reduce safety concerns, financial losses and the emotional stress associated with residing on Australian floodplains. Such approaches acknowledge the interconnected nature of riverine floodplains and their inhabitants. However resilience principles need to be given a physical spatial function within specific social contexts. Architecture provides a platform to test new and retrofit adaptable approaches to promote a more suitable spatial relationship with the river. This thesis will take the theory and literature of resilience and apply it to a site-specific spatial context: Maitland. Maitland city is built on one of the most flood prone regions in New South Wales (Keys, 1999). Despite the Hunter Valley Flood Mitigation Scheme, which consists of 170 kilometers of levees and flood control structures, flooding continues to occur in and around Maitland. Regardless of these flood risks, Maitland City Council is proposing large scale residential development on the floodplain to encourage population increase. Maitland will be used as the primary case study for investigating the opportunities socio-spatial resilience interventions have for improving the longterm inhabitation of the floodplain. This thesis proposes a multi-scaled approach to examine flood hazard and exposure at the individual, community, city and regional scale. As spatial designers it is imperative that architects play a part in this explorative process</p>

Design of Villages and Towns Flood Disaster Simulation and Emergency Decision Support System

2012 ◽  
Vol 198-199 ◽  
pp. 808-813
Author(s):  
Xiao Yu Song ◽  
Shou Jin Wang ◽  
Yong Hui Wang ◽  
Ming Zhao
Keyword(s):  
Decision Support ◽  
Emergency Management ◽  
Flood Control ◽  
Flood Disaster ◽  
Flood Mitigation ◽  
Flood Prevention ◽  
Virtual Reconstruction ◽  
Visualization Technology ◽  
Emergency Decision ◽  
The Town

China is a country prone to natural disasters, especially the flood disaster. In order to improve the villages and towns flood emergency management, through a series of methods such as information management and simulation, the establishment of emergency decision support using information technology to reduce losses caused by floods, the visualization technology is used in the virtual reconstruction model of floods, intuitive way to simulate the dynamic spread of the process of the flood disaster, in a safe and economical method to obtain the number of indicators of disaster-related decision. It provides a new method and ideas, and then it gives a reliable basis for the flood prevention and emergency management. The visualization analysis and decision is achieved for the villages and towns flood control, and it provides great support for the villages and towns flood mitigation and prevention. The result shows that the system is useful and meaningful in the town flood mitigation.

scholarly journals Using 2D HEC-RAS Modeling and Embankment Dam Break Scenario for Assessing the Flood Control Capacity of a Multi-Reservoir System (NE Romania)

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 57
Author(s):  
Andrei Urzică ◽  
Alin Mihu-Pintilie ◽  
Cristian Constantin Stoleriu ◽  
Cătălin Ioan Cîmpianu ◽  
Elena Huţanu ◽  
...  
Keyword(s):  
Flood Control ◽  
Flood Hazard ◽  
Hydraulic Modeling ◽  
Dam Break ◽  
Recurrence Interval ◽  
Flood Mitigation ◽  
Dam Failure ◽  
Inflow Rate ◽  
Embankment Dam ◽  
Reservoir System

Using hydraulic modeling techniques (e.g., one-dimensional/two-dimensional (1D/2D) hydraulic modeling, dam break scenarios) for extracting the flood settings is an important aspect of any action plan for dam failure (APDF) and flood mitigation strategy. For example, the flood hydraulic models and dam break scenario generated based on light detection and ranging (LiDAR)-derived digital elevation models (DEMs) and processed in the dedicated geographic information systems (GIS) and hydraulic modeling software (e.g., HEC-RAS—Hydrologic Engineering Center River Analysis System, developed by USACE HEC, Davis, CA, USA) can improve the flood hazard maps in case of potentially embankment dam failure. In this study, we develop a small-scale conceptual approach using 2D HEC-RAS software according to the three embankment dam break scenarios, LiDAR data (0.5 m spatial resolution), and 2D hydraulic modeling for the Başeu multi-reservoir system which belongs to the Başeu River (NE Romania) including R1—Cal Alb reservoir, R2—Movileni reservoirs, R3—Tătărăşeni reservoirs, R4—Negreni reservoirs, and R5—Hăneşti reservoirs. In order to test the flood control capacity of the Bașeu multi-reservoir system, the Cal Alb (R1) dam break scenario (piping failure) was taken into account. Three 2D stream flow modeling configurations based on R1 inflow rate with a 1% (100 year), 0.5% (500 year), and 0.1% (1000 year) recurrence interval and the water volume which can be accumulated with that specific inflow rate (1% = 10.19 × 106 m3; 0.5% = 12.39 × 106 m3; 0.1% = 17.35 × 106 m3) were computed. The potential flood wave impact was achieved on the basis of different flood severity maps (e.g., flood extent, flood depth, flood velocity, flood hazard) generated for each recurrence interval scenario and highlighted within the built-up area of 27 settlements (S1–S27) located downstream of R1. The results showed that the multi-reservoir system of Bașeu River has an important role in flood mitigation and contributes to the APDF in the context of climate change and the intensification of hydrological hazard manifestation in northeastern Romania.

scholarly journals Floodplain Inhabitation: A Socio-Spatial Resilience Network

2021 ◽  
Author(s):  
◽  
Rebecca Boyle
Keyword(s):  
Flood Control ◽  
New South ◽  
Regional Scale ◽  
New South Wales ◽  
City Council ◽  
Flood Mitigation ◽  
Ecological Resilience ◽  
Population Increase ◽  
Spatial Resilience ◽  
South Wales

<p>The inadequacy of current approaches to managing floodplain inhabitation was highlighted in the 2010-11 Queensland, northern New South Wales and Victorian floods; the most costly floods in Australia’s history. Despite technological advancements and the prevalence of flood mitigation infrastructure, floods continue to have widespread adverse physical, social, economic, and emotional impacts. This situation is mirrored internationally and is anticipated to worsen as scientists predict an increase in the severity and prevalence of natural disasters such as flooding. In response to this, management of floodplain inhabitation must shift from flood prevention to adaptation. Adaptation is a key term in ecological resilience, defined as the capacity of a system to adapt and persist in the face of disturbance (Holling 1976). Hendstra et al (2004) suggests that in the context of disaster-resilient cities, resilience can be defined as the “capacity to adapt to stress from hazards and the ability to recover quickly from their impacts” (Henstra, Kovacs, McBean, & Sweeting, 2004, p. 5). Analysis of ecosystems reveals that interdependence across scales, variety, redundancy, adaptability and feedback are the key resilience principles enabling the system to adapt and maintain stability during flooding. At present there is a sparsity of literature exploring spatial resilience approaches to improving floodplain inhabitation. Whilst amphibious approaches improve individual resilience, there is a lack of innovative solutions to improve community and city resilience to flooding. Resilience approaches have the potential to reduce safety concerns, financial losses and the emotional stress associated with residing on Australian floodplains. Such approaches acknowledge the interconnected nature of riverine floodplains and their inhabitants. However resilience principles need to be given a physical spatial function within specific social contexts. Architecture provides a platform to test new and retrofit adaptable approaches to promote a more suitable spatial relationship with the river. This thesis will take the theory and literature of resilience and apply it to a site-specific spatial context: Maitland. Maitland city is built on one of the most flood prone regions in New South Wales (Keys, 1999). Despite the Hunter Valley Flood Mitigation Scheme, which consists of 170 kilometers of levees and flood control structures, flooding continues to occur in and around Maitland. Regardless of these flood risks, Maitland City Council is proposing large scale residential development on the floodplain to encourage population increase. Maitland will be used as the primary case study for investigating the opportunities socio-spatial resilience interventions have for improving the longterm inhabitation of the floodplain. This thesis proposes a multi-scaled approach to examine flood hazard and exposure at the individual, community, city and regional scale. As spatial designers it is imperative that architects play a part in this explorative process</p>

scholarly journals Reduce Flood Losses Of Kali Tanggul Using Spatial Based Technical Approaches

UKaRsT ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 174
Author(s):  
Prabowo Prabowo ◽  
Gusfan Halik ◽  
Entin Hidayah ◽  
Taqiudin Haq
Keyword(s):  
Flood Control ◽  
Control Structure ◽  
Mitigation Strategy ◽  
Flood Mitigation ◽  
Flood Inundation ◽  
Hydraulic Analysis ◽  
Inundation Height ◽  
Flood Inundation Modeling ◽  
Downstream Area ◽  
Inundation Modeling

Flood disasters frequently occurred in Jember Regency, East Java. It is usually caused by the overflow of the Tanggul River in the rainy season, especially in the downstream area. Flood control could be done by building dams, embankments, shortcuts, and other technical flood protections. Meanwhile, mitigation efforts such as developing thematic maps of flood inundation need to be done to minimize losses caused by the flood. This study aims to design a flood mitigation strategy technically. The flood control structure was proposed by designing a shortcut in Kali Tanggul. Its performance was analyzed to reduce flood inundation in the Tanggul watershed. The flood inundation modeling was carried out using spatial analysis using ArcGIS 10.1 and hydraulic analysis using HECRAS 5.0.3. Flood inundation results were compared with the Tanggul watershed flood map developed by UPT PUSDA Lumajang. Based on modeling results, flood control using shortcuts is considered an effective strategy for flood mitigation. It was indicated by the reduction of flood inundation distributions, flood inundation height, and flood-affected areas. The results show that the flood height decrease 0.47 up to 0.56 m

scholarly journals Incorporating Floodplain Inundation as a Strategy in Flood Mitigation Plan

2012 ◽  
Vol 3 ◽  
pp. 41-45
Author(s):  
Darrien Y.S. Mah ◽  
Rosmina A. Bustami ◽  
Frederik J. Putuhena
Keyword(s):  
Control Systems ◽  
Flood Control ◽  
Systemic Change ◽  
Flood Management ◽  
Flood Mitigation ◽  
Engineering Structure ◽  
Natural Systems ◽  
Floodplain Inundation ◽  
Flooded Areas

This paper is promoting the awareness that nature and engineering structure can co-exist together. Natural floodplain inundation is usually restrained to separate floodplain lands for human uses. In contrary to conventional flood control systems, a vision of restoring floodplain inundation in Kuching Bypass Floodway is presented as a flood mitigation plan. Modelling of the approach indicates a reduction of flooded areas up to 61%. By means of modelling, portions of floodplains are virtually preserved in their natural states and functions, a role that often has been undervalued. Floodplain permits storage and conveyance of floodwaters. At the same time, it provides replenishment of the adjoining wetlands. The strategy proves beneficial to both human and natural systems. It also calls for a systemic change in flood management that we can live with the natural forces instead of forbidding them.

scholarly journals Impact of Flood Control Systems on the Probability Distribution of Floods

2021 ◽  
Author(s):  
Salvatore Manfreda ◽  
Domenico Miglino ◽  
Cinzia Albertini
Keyword(s):  
Probability Distribution ◽  
Control Systems ◽  
Flood Control ◽  
Mathematical Formulation ◽  
River Basins ◽  
Flood Mitigation ◽  
Mathematical Framework ◽  
Flood Peak ◽  
Detention Basins ◽  
The Impact

Abstract. Detention dams are one of the most effective practices for flood mitigation. Therefore, the impact of these structures on the basin hydrological response is critical for flood management and the design of flood control structures. With the aim to provide a mathematical framework to interpret the effect of flow control systems on river basin dynamics, the functional relationship between inflows and outflows is investigated and derived in a closed-form. This allowed the definition of a theoretically derived probability distribution of the peak outflows from in-line detention basins. The model has been derived assuming a rectangular hydrograph shape with a fixed duration, and a random flood peak. In the present study, the undisturbed flood distribution is assumed to be Gumbel distributed, but the proposed mathematical formulation can be extended to any other flood-peak probability distribution. A sensitivity analysis of parameters highlighted the influence of detention basin capacity and rainfall event duration on flood mitigation on the probability distribution of the peak outflows. The mathematical framework has been tested using for comparison a Monte Carlo simulation where most of the simplified assumptions used to describe the dam behaviours are removed. This allowed to demonstrate that the proposed formulation is reliable for small river basins characterized by an impulsive response. The new approach for the quantification of flood peaks in river basins characterised by the presence of artificial detention basins can be used to improve existing flood mitigation practices, support the design of flood control systems and flood risk analyses.

scholarly journals A Time-Integrated Index for Flood Risk to Resistance Capacity

Water ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1321 ◽  
Author(s):  
Osvaldo M. Rezende ◽  
Luciana F. Guimarães ◽  
Francis M. Miranda ◽  
Assed N. Haddad ◽  
Marcelo G. Miguez
Keyword(s):  
Urban Areas ◽  
Flood Control ◽  
Urban Infrastructure ◽  
Flood Mitigation ◽  
Mitigation Measures ◽  
Open Spaces ◽  
Flood Plains ◽  
Sequence Of Events ◽  
Integrated Index ◽  
Main Target

The lack of open spaces and the intense land use occupation in flood plains makes floods in consolidated urban areas difficult to mitigate. In these areas, setting a standard pre-defined return period for projects can limit and even preclude flood mitigation actions. However, it is possible to propose flood control alternatives that are compatible with available spaces. Thus, determining how much the original risk is reduced and how significant the residual risk can be becomes the main target. In this context, a time-integrated index for risk to resistance capacity is proposed to address these questions. This index correlates the exposure of buildings and urban infrastructure to the hazard of a given flood and is then evaluated over a project horizon through a sequence of events. The proposed index is applied to the Canal do Mangue catchment, a highly urbanized watershed located in Rio de Janeiro. The results demonstrate the difficulty of designing flood mitigation measures in extremely occupied watersheds and the importance of evaluating residual risks associated with proposed projects. As an additional result, a scenario with concentrated measures is compared to another with distributed interventions, evidencing the greater coverage of the latter.

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