scholarly journals Development of a Simulation Model for Real-Time Urban Floods Warning: A Case Study at Sukhumvit Area, Bangkok, Thailand

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1458
Author(s):  
Detchphol Chitwatkulsiri ◽  
Hitoshi Miyamoto ◽  
Sutat Weesakul
Keyword(s):  
Real Time ◽  
Water Resource Management ◽  
Drainage System ◽  
Flood Management ◽  
Rainfall Data ◽  
Urban Drainage ◽  
Flood Inundation ◽  
The Real ◽  
Inundation Area ◽  
Flood Inundation Mapping

Increasingly frequent, high-intensity rain events associated with climatic change are driving urban drainage systems to function beyond their design discharge capacity. It has become an urgent issue to mitigate the water resource management challenge. To address this problem, a real-time procedure for predicting the inundation risk in an urban drainage system was developed. The real-time procedure consists of three components: (i) the acquisition and forecast of rainfall data; (ii) rainfall-runoff modeling; and (iii) flood inundation mapping. This real-time procedure was applied to a drainage system in the Sukhumvit area of Bangkok, Thailand, to evaluate its prediction efficacy. The results showed precisely that the present real-time procedure had high predictability in terms of both the water level and flood inundation area mapping. It could also determine hazardous areas with a certain amount of lead time in the drainage system of the Sukhumvit area within an hour of rainfall data. These results show the real-time procedure could provide accurate flood risk warning, resulting in more time to implement flood management measures such as pumping and water gate operations, or evacuation.

scholarly journals A Raster-based model for flood inundation mapping on delta lowland

2018 ◽  
Vol 229 ◽  
pp. 03012 ◽  
Author(s):  
Nurhamidah Nurhamidah ◽  
Bujang Rusman ◽  
Bambang Istijono
Keyword(s):  
Rapid Development ◽  
Drainage System ◽  
Heavy Rain ◽  
Geographical Information ◽  
Urban Drainage ◽  
Flood Inundation ◽  
Future Planning ◽  
Long Duration ◽  
Flood Inundation Mapping ◽  
Prone Area

A high intensity of rainfall experiences flooding in some areas. Flooding can be caused by several aspects, such as inadequate urban drainage, reduce the porous surface due to rapid development and the topography of the area itself. Flood has always been a scourge for the inhabitants of Padang city. Especially when there are a heavy-rain and long duration, certainly flood will hit some places in Padang city. Therefore, many things that must be considered by the local government in overcoming the problem of this flood, including improvements of the drainage system, reforestation and create the polders. In this research, it is described the area of the prone area in Padang city with spatial analysis tools which are approached in the Geographical Information System. Based on the topography of the Padang city, inundated areas and flood direction will be presented in case of the heavy rain occurs. From the analysis, there are several points of vulnerable inundation in Padang city that are generally located in densely populated areas and main roads in Padang city which can be considered for the future planning.

A novel approach to the real-time modelling of large urban drainage systems

1997 ◽  
Vol 36 (8-9) ◽  
pp. 19-24 ◽  
Author(s):  
Richard Norreys ◽  
Ian Cluckie
Keyword(s):  
Real Time ◽  
Dynamic Models ◽  
Drainage System ◽  
Radar Data ◽  
Urban Drainage ◽  
Real Time Control ◽  
Empirical Modelling ◽  
Time Control ◽  
Novel Approach ◽  
Non Linear Systems

Conventional UDS models are mechanistic which though appropriate for design purposes are less well suited to real-time control because they are slow running, difficult to calibrate, difficult to re-calibrate in real time and have trouble handling noisy data. At Salford University a novel hybrid of dynamic and empirical modelling has been developed, to combine the speed of the empirical model with the ability to simulate complex and non-linear systems of the mechanistic/dynamic models. This paper details the ‘knowledge acquisition module’ software and how it has been applied to construct a model of a large urban drainage system. The paper goes on to detail how the model has been linked with real-time radar data inputs from the MARS c-band radar.

Energy optimization of the urban drainage system by integrated real-time control during wet and dry weather conditions

2018 ◽  
Vol 15 (4) ◽  
pp. 362-370 ◽  
Author(s):  
Stefan Kroll ◽  
Alessio Fenu ◽  
Tom Wambecq ◽  
Marjoleine Weemaes ◽  
Jan Van Impe ◽  
...  
Keyword(s):  
Real Time ◽  
Energy Optimization ◽  
Drainage System ◽  
Weather Conditions ◽  
Urban Drainage ◽  
Real Time Control ◽  
Urban Drainage System ◽  
Time Control

Towards Smart Water Cities – opportunities arising from Smart Rain Barrels for urban drainage and water supply

2020 ◽  
Author(s):  
Martin Oberascher ◽  
Carolina Kinzel ◽  
Martin Schöpf ◽  
Ulrich Kastlunger ◽  
Christoph Zingerle ◽  
...  
Keyword(s):  
High Resolution ◽  
Water Supply ◽  
Real Time ◽  
Control Strategy ◽  
Drainage System ◽  
Urban Drainage ◽  
Urban Water ◽  
Water Infrastructure ◽  
Smart Water ◽  
Smart Campus

<p>In this work, the concept of the smart rain barrel (SRB) as an IoT solution for green infrastructure is presented. The SRB are real-time controlled micro-storages (200 litre) used for an advanced rainwater management. System states and high-resolution weather forecasts from the meteorological service are integrated into the control strategy to provide adequate rainwater for irrigation requirements and to reduce peak runoff in the drainage system. The integration into the smart water infrastructure and the exchange of control commands is done via LoRaWAN, a low-power radio network. For ease of development and to demonstrate the effectiveness of the SRB concept, a two-stage approach was chosen.</p><p>First, a prototype of the SRB was built, which is in operation at the university campus of Innsbruck (Austria) during the summer months since 2019. The campus area, also denoted Smart Campus, is part of a pilot project for a “Smart Water City”. This campus is used as both, demonstration object and experimental framework for smart applications in urban water management. The Smart Campus integrates water supply and urban drainage into a joint controlled system, in which natural and anthropogenic water inflows and outflows are measured in real-time. Current measurements encompass water consumptions and pressures in the distribution system, meteorological data at different locations, filling levels in the drainage system, as well as filling levels and soil moistures of decentralised stormwater retention and infiltration systems. The temporal resolution of the measurements is depending on the application between 1 and 15 minutes. By using these high-resolution measurement data, the Smart Campus is an ideal testing ground for smart applications such as the SRB.</p><p>In addition, numerical simulations were carried out to test different control strategies and to investigate the effects of a large-scale implementation of the SRBs at community level. The results show that the SRBs can significantly improve system performance (e.g. reduce potable drinking water demand and reduce the risk of flooding) despite their small storage volumes. But the results also demonstrate, that if a large number of SRBs are implemented, a coordinated control strategy to operate SRBs and urban water infrastructure is necessary to avoid a worsening of the system (e.g. generate a combined sewer overflow by simultaneous emptying the SRBs during dry weather flow).</p>

scholarly journals DETERMINAÇÃO DO LIMITE DA FAIXA DE INUNDAÇÃO COM USO DO HEC-RAS PARA O PARQUE LINEAR DO CÓRREGO MACAMBIRA EM GOIÂNIA, GOIÁS (doi:10.5216/reec.V11i1.32101)

2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Fernanda Almeida de Oliveira ◽  
Carolina Queiroz Arantes ◽  
Juliana Almeida de Oliveira ◽  
Tatiane Souza Rodrigues Pereira ◽  
Tatiane Souza Rodrigues Pereira ◽  
...  
Keyword(s):  
Drainage System ◽  
Urban Stream ◽  
Flood Inundation ◽  
Public Park ◽  
Inundation Area ◽  
Hydrodynamic Study ◽  
The Subject ◽  
Small Industries ◽  
The City ◽  
Natural Channel

RESUMO: O presente trabalho teve por objetivo delimitar as áreas inundáveis do Córrego Macambira para implantação de um parque linear. Esse curso d'água é objeto de um projeto denominado Programa Urbano Ambiental Macambira-Anicuns com a finalidade de transformar as margens de dois córregos em um parque para população do município de Goiânia-GO. O curso d'água em questão, não diferente dos outros presentes na área urbana, atualmente se encontra degradado e com as áreas de várzea ocupadas desordenadamente por habitações, comércios, pequenas plantações e indústrias. Para a delimitação do perímetro máximo do parque, sua área de abrangência, foi necessário um estudo hidrodinâmico com a delimitação da faixa de inundação das margens do córrego urbano Macambira, em Goiânia, utilizando topografia de alta resolução e o software HEC-RAS. De forma geral, a mancha de inundação obtida para a área em estudo apresentou estar dentro da calha natural inundável do curso d'água na maior parte do tempo. No entanto, alguns pontos ocorrem transbordamentos, que atingem as ruas e locais de áreas habitadas, podendo chegar a até 70 metros a partir da calha natural. Dessa forma, a modelagem por HEC-RAS permitiu contemplar o diagnóstico atual do funcionamento hidrodinâmico do sistema de drenagem do Córrego Macambira com foco no comportamento hidráulico da calha de drenagem existente, servindo de base para o projeto, para que se posa estabelecer estratégias de intervenções eficazes mais apropriadas para cada situação. ABSTRACT: This study aimed to define the flood inundation area of the stream Macambira to implement a linear park. This stream is the subject of a project called Urban Environmental Program-Macambira Anicuns, which aims to transform the banks of these two streams in a public park for the city of Goiania. The stream in question, not different from the others in the urban area, is currently degraded and the floodplain areas occupied by disorderly houses, shops, small industries and plantations. To define the maximum perimeter of the park, its area of coverage, a hydrodynamic study was necessary with the delimitation of flood area of Macambira's urban stream margins, in Goiania, using high-resolution topography and HEC-RAS software. Overall, the flood of band obtained for the study area was flooded in the natural channel of the stream. However, there are overflowing in some points, reaching the streets and places of populated areas, reaching up to 70 meters from the natural channel. Thus, the modeling HEC-RAS allowed contemplate the current diagnosis of the drainage system Stream Macambira, focusing on the hydraulic behavior of the existing drainage channel, providing the basis for the project, so that we can establish effective intervention strategies more appropriate for each situation.

scholarly journals Real-time forecasting urban drainage models: full or simplified networks?

2010 ◽  
Vol 62 (9) ◽  
pp. 2106-2114 ◽  
Author(s):  
J. P. Leitão ◽  
N. E. Simões ◽  
Č. Maksimović ◽  
F. Ferreira ◽  
D. Prodanović ◽  
...  
Keyword(s):  
Real Time ◽  
Overland Flow ◽  
Reference Model ◽  
Drainage System ◽  
Computational Time ◽  
Urban Drainage ◽  
Flood Prediction ◽  
Hydraulic Simulation ◽  
Simulation Results ◽  
Simulation Time

Lead time between rainfall prediction results and flood prediction results obtained by hydraulic simulations is one of the crucial factors in the implementation of real-time flood forecasting systems. Therefore, hydraulic simulation times must be as short as possible, with sufficient spatial and temporal flood distribution modelling accuracy. One of the ways to reduce the time required to run hydraulic model simulations is increasing computational speed by simplifying the model networks. This simplification can be conducted by removing and changing some secondary elements using network simplification techniques. The emphasis of this paper is to assess how the level of urban drainage network simplification influences the computational time and overall simulation results' accuracy. The models used in this paper comprise a sewer network and an overland flow drainage system in both 1D/1D and 1D/2D approaches. The 1D/1D model is used as the reference model to generate several models with different levels of simplifications. The results presented in this paper suggest that the 1D/2D models are not yet suitable to be used in real-time flood prediction applications due to long simulation time, while on the other hand, the simplified 1D/1D models show that considerable reductions in simulation time can be achieved without compromising simulation results (flow and water depth) accuracy.

Real-time control of urban drainage system: Optimization of spillways

2015 ◽  
Author(s):  
S. Spina ◽  
L. Pancotto ◽  
G. Paris ◽  
F. Lombardo ◽  
S. Magnaldi ◽  
...  
Keyword(s):  
Real Time ◽  
Drainage System ◽  
System Optimization ◽  
Urban Drainage ◽  
Real Time Control ◽  
Urban Drainage System ◽  
Time Control

scholarly journals The Importance of Digital Elevation Model Selection in Flood Simulation and a Proposed Method to Reduce DEM Errors: A Case Study in Shanghai

2021 ◽  
Author(s):  
Kepeng Xu ◽  
Jiayi Fang ◽  
Yongqiang Fang ◽  
Qinke Sun ◽  
Chengbo Wu ◽  
...  
Keyword(s):  
Open Access ◽  
Critical Role ◽  
Flood Management ◽  
Hydraulic Modeling ◽  
Flood Mapping ◽  
Flood Inundation ◽  
Flood Simulation ◽  
Urban Flood ◽  
Digital Elevation ◽  
Flood Inundation Mapping

AbstractDigital Elevation Models (DEMs) play a critical role in hydrologic and hydraulic modeling. Flood inundation mapping is highly dependent on the accuracy of DEMs. Various vertical differences exist among open access DEMs as they use various observation satellites and algorithms. The problem is particularly acute in small, flat coastal cities. Thus, it is necessary to assess the differences of the input of DEMs in flood simulation and to reduce anomalous errors of DEMs. In this study, we first conducted urban flood simulation in the Huangpu River Basin in Shanghai by using the LISFLOOD-FP hydrodynamic model and six open-access DEMs (SRTM, MERIT, CoastalDEM, GDEM, NASADEM, and AW3D30), and analyzed the differences in the results of the flood inundation simulations. Then, we processed the DEMs by using two statistically based methods and compared the results with those using the original DEMs. The results show that: (1) the flood inundation mappings using the six original DEMs are significantly different under the same simulation conditions—this indicates that only using a single DEM dataset may lead to bias of flood mapping and is not adequate for high confidence analysis of exposure and flood management; and (2) the accuracy of a DEM corrected by the Dixon criterion for predicting inundation extent is improved, in addition to reducing errors in extreme water depths—this indicates that the corrected datasets have some performance improvement in the accuracy of flood simulation. A freely available, accurate, high-resolution DEM is needed to support robust flood mapping. Flood-related researchers, practitioners, and other stakeholders should pay attention to the uncertainty caused by DEM quality.

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