Flood Vulnerability and Risk Assessment with Parsimonious Hydrodynamic Modeling and GIS

2022 ◽  
pp. 3-18
Author(s):  
Sudhakar B. Sharma ◽  
Anupam K. Singh ◽  
Ajay S. Rajawat
Keyword(s):  
Risk Assessment ◽  
Hydrodynamic Modeling ◽  
Flood Vulnerability

scholarly journals Molecular Analyses of Fecal Bacteria and Hydrodynamic Modeling for Microbial Risk Assessment of a Drinking Water Source

Water ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 3
Author(s):  
Olga D. Chuquimia ◽  
Viktor Bergion ◽  
Jessica Guzman-Otazo ◽  
Kaisa Sörén ◽  
Lars Rosén ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Real Time ◽  
Water Intake ◽  
Real Time Pcr ◽  
Hydrodynamic Modeling ◽  
Salmonella Spp ◽  
Molecular Analyses ◽  
Microbial Risk Assessment ◽  
Microbial Risk ◽  
Campylobacter Spp

Safe water is a global concern, and methods to accurately monitor quality of water are vital. To assess the risks related to bacterial pathogen load in Lake Vomb that provides drinking water to the southern part of Sweden, this study combined molecular analyses of enterobacteria and bacterial pathogens in water using quantitiative real-time PCR with hydrodynamic modeling and quantitative microbial risk assessment (QMRA). A real-time PCR assay to detect enterobacteria was set up by primers targeting ssrA. Between February 2015 and May 2016, presence of ssrA gene copies as well as Campylobacter spp., Salmonella spp., and EHEC O157 DNA was analyzed by real-time PCR at several locations in the catchment of Lake Vomb and its tributaries Björkaån, Borstbäcken, and Torpsbäcken. Björkaån had the highest detected concentrations of the ssrA gene and, according to the results of hydrodynamic modeling, contributed most to the contamination of the water intake in the lake. None of the water samples were positive for genes encoding EHEC O157 and Campylobacter spp., while invA (Salmonella spp.) was present in 11 samples. The QMRA showed that the suggested acceptable risk level (daily probability of infection <2.7 × 10−7) is achieved with a 95% probability, if the Salmonella concentrations in the water intake are below 101 bacteria/100 mL. If a UV-disinfection step is installed, the Salmonella concentration at the water intake should not exceed 106 bacteria/100 mL.

scholarly journals Flood Hazard, Vulnerability and Risk Assessment for Different Land Use Classes Using a Flow Model

2019 ◽  
Vol 4 (1) ◽  
pp. 225-244 ◽  
Author(s):  
Md Abdullah Al Baky ◽  
Muktarun Islam ◽  
Supria Paul
Keyword(s):  
Risk Assessment ◽  
Critical Point ◽  
Return Period ◽  
Flood Risk ◽  
Flood Hazard ◽  
Flow Simulation ◽  
Flood Risk Assessment ◽  
Damage Functions ◽  
Flood Vulnerability ◽  
Different Levels

AbstractThis study is concerned with flood risk that can be assessed by integrating GIS, hydraulic modelling and required field information. A critical point in flood risk assessment is that while flood hazard is the same for a given area in terms of intensity, the risk could be different depending on a set of conditions (flood vulnerability). Clearly, risk is a function of hazard and vulnerability. This study aims to introducing a new approach of assessing flood risk, which successfully addresses this above-mentioned critical issue. The flood risk was assessed from flood hazard and vulnerability indices. Two-dimensional flood flow simulation was performed with Delft3D model to compute floodplain inundation depths for hazard assessment. For the purpose of flood vulnerability assessment, elements at risk and flood damage functions were identified and assessed, respectively. Then, finally flood risk was assessed first by combining replacement values assessed for the elements and then using the depth–damage function. Applying this approach, the study finds that areas with different levels of flood risk do not always increase with the increase in return period of flood. However, inundated areas with different levels of flood depth always increase with the increase in return period of flood. The approach for flood risk assessment adopted in this study successfully addresses the critical point in flood risk study, where flood risk can be varied even after there is no change in flood hazard intensity.

scholarly journals AN INDICATOR-BASED APPROACH FOR MICRO-SCALE PHYSICAL FLOOD VULNERABILITY MAPPING

2019 ◽  
Vol XLII-4/W16 ◽  
pp. 331-337
Author(s):  
I. U. Kaoje ◽  
M. Z. Abdul Rahman ◽  
T. H. Tam ◽  
M. R. Mohd Salleh
Keyword(s):  
Risk Assessment ◽  
At Risk ◽  
Vulnerability Assessment ◽  
Flood Risk ◽  
Vulnerability Mapping ◽  
Rapid Urbanization ◽  
Flood Vulnerability ◽  
Protection Measures ◽  
Micro Scale ◽  
Elements At Risk

Abstract. Map representation of vulnerability is a crucial step in evaluating flood impact and all vulnerability indicators that are the final product of risk assessment. So far, in flood risk assessment, this is probably the weakest link. Flood risk mapping suffers from inequality in the level of development in presenting the different components: where exposure and hazard modelling and mapping is well developed and advanced, while vulnerability analysis and mapping are underdeveloped. Therefore, the objective of this paper is to discuss a newly developed GIS-based approach on micro-scale flood vulnerability mapping of physical elements at risk using an indicator-based method. Micro-scale flood vulnerability is used to eliminate flood vulnerability in an area with a high probability of occurrences. The approach is suitable for cost-benefit analysis of structures protection measures. At micro-scale flood vulnerability mapping, it is more suitable to adopt indicator-based vulnerability assessment methods. Because it provides an opportunity for incorporating all the factors and characteristics of elements at risk that contribute to generating their flood vulnerability. Likewise, a considerable amount of studies argue that vulnerability assessment and its representation on maps should focus on the identification of variables that influence the vulnerability of an element at risk. Flood vulnerability mapping at micro-scale provides critical information for the decision-makers on why specific infrastructures are susceptible more than the others. Moreover, assessing and managing flood risk is crucial in order to reduce the loss and adapt to the combined effects of rapid urbanization and climate changes.

scholarly journals Hydrodynamic modeling for identifying flood vulnerability zones in lower Damodar river of eastern India

2020 ◽  
Vol 11 (4) ◽  
pp. 1035-1046
Author(s):  
Ravindra Kumar Singh ◽  
Vasanta Govind Kumar Villuri ◽  
Srinivas Pasupuleti ◽  
Rajesh Nune
Keyword(s):  
Hydrodynamic Modeling ◽  
Eastern India ◽  
Flood Vulnerability ◽  
Damodar River

scholarly journals Flood Hazard and Risk Assessment Due to Land Use Changes in Purbalingga, Indonesia

2020 ◽  
Vol 9 (4) ◽  
pp. 1315-1318
Keyword(s):  
Risk Assessment ◽  
Land Use ◽  
Spatial Analysis ◽  
Urban Planning ◽  
Flood Hazard ◽  
Land Use Changes ◽  
Current Data ◽  
Projection Data ◽  
Flood Vulnerability ◽  
Hazard Zoning

Purbalingga Regency is one of the regencies in Central Java Province that has rapid growing in economic and tourism in accordance with comprehensive urban planning. Land use changes is an important aspect of urban planning. Therefore, spatial analysis is needed to highlight the problem of flooding in Purbalingga Regency. Spatial analysis performed for flood risk is a spatial analysis based on flood hazard zoning and flood vulnerability. Flood hazard zoning and flood vulnerability analysis were conducted using Analytical Hierarchy Process (AHP) and Geographic Information System (GIS) for existing condition, regarding current data and projection condition presented in Purbalingga Urban Planning 2011-2031. Result of flood hazard zoning analysis showed that for existing condition, Purbalingga Regency is mostly considered into the medium category of hazard category with an area of 62,652.077 ha. On the other hand, referring urban planning projection data 2031, there is a decrease in categories of low, medium, and high, but increase in very high and extreme category. Risk assessment shows that Purbalingga Regency currently has an extreme category with an area of 11,080.047 ha, including the proposed location of Wirasaba Airport.

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