The Use of Lamination Basins for Mitigation of the Urban Flooding Risk: The Case Study of Peschici

2021 ◽  
pp. 491-500
Author(s):  
Ciro Apollonio ◽  
Andrea Petroselli ◽  
Raffaele Pelorosso ◽  
Salvatore Grimaldi ◽  
Crescenzo Luca Frontuto ◽  
...  
Keyword(s):  
Urban Flooding ◽  
Flooding Risk

scholarly journals Designing for People’s Safety on Flooded Streets: Uncertainties and the Influence of the Cross-Section Shape, Roughness and Slopes on Hazard Criteria

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2119
Author(s):  
Luís Mesquita David ◽  
Rita Fernandes de Carvalho
Keyword(s):  
Cross Section ◽  
Overland Flow ◽  
Rectangular Cross Section ◽  
Safety Hazard ◽  
Cross Section Shape ◽  
Section Shape ◽  
Flood Flows ◽  
The Cross ◽  
Flooding Risk

Designing for exceedance events consists in designing a continuous route for overland flow to deal with flows exceeding the sewer system’s capacity and to mitigate flooding risk. A review is carried out here on flood safety/hazard criteria, which generally establish thresholds for the water depth and flood velocity, or a relationship between them. The effects of the cross-section shape, roughness and slope of streets in meeting the criteria are evaluated based on equations, graphical results and one case study. An expedited method for the verification of safety criteria based solely on flow is presented, saving efforts in detailing models and increasing confidence in the results from simplified models. The method is valid for 0.1 m2/s 0.5 m2/s. The results showed that a street with a 1.8% slope, 75 m1/3s−1 and a rectangular cross-section complies with the threshold 0.3 m2/s for twice the flow of a street with the same width but with a conventional cross-section shape. The flow will be four times greater for a 15% street slope. The results also highlighted that the flood flows can vary significantly along the streets depending on the sewers’ roughness and the flow transfers between the major and minor systems, such that the effort detailing a street’s cross-section must be balanced with all of the other sources of uncertainty.

Construction of Urban Flooding Prevention System under “One City, One Executor, and One Network” Model: Case Study of Kunming, China

2021 ◽  
Vol 22 (3) ◽  
Author(s):  
Fei Zhao ◽  
Jingzhi Cai ◽  
Hongyun Zeng ◽  
Zhiqiang Xie ◽  
Qingyun Du ◽  
...  
Keyword(s):  
Network Model ◽  
Urban Flooding ◽  
Model Case ◽  
Prevention System

scholarly journals Analysis of urban flood using synthetic unit hydrograph (SUH) and flood mitigation strategies along way Halim River: a case study on Seroja street, Tanjung Senang District

2021 ◽  
Vol 331 ◽  
pp. 07015
Author(s):  
Dian Pratiwi ◽  
Arniza Fitri ◽  
Arlina Phelia ◽  
Nabila Annisa Amara Adma ◽  
Kastamto
Keyword(s):  
Mitigation Strategies ◽  
Flood Mitigation ◽  
Trigger Factor ◽  
Urban Flooding ◽  
Unit Hydrograph ◽  
Urban Flood ◽  
Flood Discharge ◽  
Absorption Area ◽  
Synthetic Unit Hydrograph

In the urban area, flooding becomes the most common disaster that has not been resolved until today. The utilization of river border area into housing and lack of absorption area becomes the trigger factor of urban flooding, as what is happening around Way Halim River on Seroja street. In this area, floods often happen during the rainy season, with the latest events recorded on January 21st, 2021. Analysis of flood intensities and discharges can be parameters for the decision-making of flood mitigation strategies. This study aims to analyze the flood discharges along Way Halim River, Seroja street by comparing the flood discharges resulting from three analysis methods of Synthetic Unit Hydrograph (SUH) including Gama I SUH, Nakayasu SUH, and Snyder SUH. Finally, suitable flood mitigation strategies were also proposed in this study based on the flood discharges and rain intensities. The results showed that Nakayasu SUH had the highest peak flood discharge than Snyder SUH and Gama I SUH. Based on the results of the investigation of land suitability; and analysis of rainfall intensities and flood discharges, the proposed flood mitigation in Seroja street is by installing biopore infiltration holes along Seroja street for storing water and reducing the risk of flooding in the area.

Urban Flooding—A Case Study of Chennai Floods of 2015

2020 ◽  
pp. 797-807
Author(s):  
Mohammad Sharif ◽  
M. S. Dhillon ◽  
Sharad Chandra ◽  
Manoj Kumar ◽  
Vasanthakumar V
Keyword(s):  
Urban Flooding

Flood resilience in Malaysian cities: a case study of two towns in Johor state

2019 ◽  
Vol 11 (3) ◽  
pp. 329-342 ◽  
Author(s):  
Tej Kumar Karki
Keyword(s):  
Research Question ◽  
Structured Interview ◽  
Urban Flooding ◽  
Structured Interviews ◽  
Flood Vulnerability ◽  
Content Type ◽  
Land Use Regulations ◽  
Flood Disasters ◽  
Institutional Resources

Purpose This paper has carried out a case study of two flood-prone towns in Johor state, Malaysia, to understand how resilient the residents and local authorities were in dealing with the flood disasters in terms of their ability to anticipate, mobilize institutional resources, adapt and respond. Design/methodology/approach This research conducted semi-structured interviews with flood-affected residents, flood disaster managers and planners, and assessed land use regulations and institutional strengths to answer the research question. Findings The results showed that the residents’ anticipatory capacity to flood risks was weak and both the human and institutional resources were insufficient in coping with and responding to urban flooding. Research limitations/implications This research has not carried out questionnaire survey of large number of residents. It is based on semi-structured interview of ten residents in two Malaysian cities. Practical implications The insights drawn from this research would help develop flood-resilient policies for Malaysian cities. The global communities exposed to flood disasters too benefit from the Malaysia’s minute but crucial human and institutional experiences in urban flooding. Social implications Being resilient to all these small but important flood concerns has huge potential to reduce vulnerability and disaster risks and protect the lives and properties of flood affected urban residents. Originality/value The research focus in Malaysia is less on flood resilience and more on flood modeling and hydrology analysis. In this sense, this research is new because it talks more on flood vulnerability and resilience issues at the community level and gives a perspective on current Malaysian town's state of flood resilience culture and practices.

scholarly journals Hydroinformatics in multi-colours—part red: urban flood and disaster management

2009 ◽  
Vol 11 (3-4) ◽  
pp. 166-180 ◽  
Author(s):  
Arthur E. Mynett ◽  
Zoran Vojinovic
Keyword(s):  
Disaster Management ◽  
Millennium Development Goals ◽  
Environmental Science ◽  
Urban Flooding ◽  
Urban Flood ◽  
Niagara Falls ◽  
The Past ◽  
Development Goals

Hydroinformatics found its origin in the advancement of computational hydraulics in the early 1990s but has expanded considerably, both in scope and in application areas. It is now not only being applied in the fields of hydraulics and hydrology (often indicated by the colour blue), but also in environmental science and technology (green) as well as in knowledge systems and knowledge management (yellow). This paper focuses on urban (red) applications of hydroinformatics, taking urban flood and disaster management as an example. It is part of a sequence of papers, each focusing on a particular field (colour) of hydroinformatics, which together constitute a multi-coloured rainbow of application areas that hydroinformatics has expanded into over the past two decades or so. The combined papers on “Hydroinformatics in multi-colours” were presented as the opening keynote of the Workshop on Advances in Hydroinformatics held in Niagara Falls, in June 2007. In this paper—part red of the sequence—the role of urban hydroinformatics in assessing effects of climate change on urban flooding and health risk is addressed in relation to the UN Millennium Development Goals and illustrated on a case study of Dhaka, Bangladesh.

scholarly journals GEOSPATIAL ASSESSMENT OF VULNERABILITIES OF CROPLANDS TO FLOODING RISKS: A CASE STUDY OF PHILIPPINE RIVER BASINS

2019 ◽  
Vol XLII-4/W19 ◽  
pp. 173-180
Author(s):  
D. M. G. dela Torre ◽  
P. K. A. dela Cruz ◽  
R. P. Jose ◽  
N. B. Gatdula ◽  
A. C. Blanco
Keyword(s):  
Adaptive Capacity ◽  
River Basin ◽  
River Basins ◽  
High Poverty ◽  
Analytic Hierarchical Process ◽  
Vulnerability Maps ◽  
Flooding Risk ◽  
Agricultural Areas ◽  
Agricultural Regions

Abstract. This study utilized the Analytic Hierarchical Process and spatial analysis using various datasets to produce sub-provincial vulnerability maps with 20 km resolution. Five (5) indicators for exposure, four (4) for sensitivity and seven (7) for adaptive capacity were selected and weighted using aggregated rankings from twenty-three (23) experts. Based on these indicators, gridded maps of exposure, sensitivity, adaptive capacity, and vulnerability were produced. Using river basins as the unit of analysis, the Pampanga River Basin was determined to be the most vulnerable, followed by the Agus River Basin, having the highest sensitivity, and Buayan River Basin, having the lowest adaptive capacity. These areas have large agricultural regions and river systems with high flooding risk. Coastal regions in southern Mindanao and eastern Visayas were also highly vulnerable to flooding. High poverty rates with high dependence on agricultural incomes and low adaptive capacities characterize these areas. Vulnerability hotspots can easily be identified through these maps, which have value in planning initiative to reduce potential damages of floods to agricultural areas.

scholarly journals Urban Flooding Risk Assessment Based on Numerical Simulation of Sub-catchment Area: A Case Study From Chengdu, China

2021 ◽  
Author(s):  
Xuejin Ying ◽  
Ting Ni ◽  
Mingxia Lu ◽  
Zongmin Li ◽  
Yi Lu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Evaluation Method ◽  
Flood Hazard ◽  
Evaluation Model ◽  
Assessment System ◽  
Urban Flooding ◽  
Fuzzy Evaluation ◽  
Evaluation Indexes ◽  
Flooding Disaster ◽  
Flooding Risk

Abstract Urbanization and climate change usually result in frequent urban flooding. Since the floods cannot be avoided, the scenario simulation combined with risk analysis is an effective way to assess the disaster level and reduce direct damage loss when facing the emergency management problems. Different from the whole city dimension, the paper proposed a sub-catchment multi-index hesitant fuzzy evaluation model for the community planning level, and takes Jinjiang District of Chengdu city as the research object. Firstly, based on the PSR (Pressure-State-Response) model, the risk assessment system has been established in three aspects, including the current situation of urban drainage, the basic geographic information, and the social influence. Secondly, A total of 14 evaluation indexes were selected, among which the pressure index came from the calculation results of ArcGIS and EPASWMM5 model such as runoff coefficient, maximum water depth, etc. Thirdly, the expert hesitate fuzzy evaluation method was used to obtain the weight of 14 indexes of each sub-catchment. Finally, the 224 evaluation results were compared, and the urban flooding disaster risk map has been drawn. It is mainly concluded that 160 medium-higher risk areas were mainly concentrated in high built-up area in study area. Furthermore, the evaluation model is very useful as a decision-making tool for mitigation of the flood hazard and its associated risk.

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