The technical and scientific approach and the main steps in setting up the plan for flood prevention, protection and mitigation at the river basin level are presented. The paper aimed to demonstrate how the application of hecras and gis techniques can be utilized for better results when carrying out a flood vulnerability mapping and assessment. Flood modelling and vulnerability assessment of settlements in the adamawa state floodplain using gis and cellular framework approach. The flood risk vulnerability mapping follows a multiparametric approach and integrates some of the flooding causative factor s such as rainfall dist ribution, elevation and. Modelling surface runoff and mapping flood vulnerability. Nov 22, 2017 present day and future social vulnerability, flood risk, and disadvantage across the uk are explored using the uk future flood explorer. Mapping flash flood will be beneficial to urban and infrastructure planners, risk managers and disaster response or emergency services during extreme and. Flood vulnerability mapping in the lower mono river basin. Present day and future social vulnerability, flood risk, and disadvantage across the uk are explored using the uk future flood explorer. The lower mono river basin has been identified as an annual flood hotspot in togo, where human and ecological systems are negatively impacted. Flood extent flood risk indicators such as number of people potentially affected utility infrastructure affected roadrail and other communication infrastructure flood extent and depth for different return periods and other flood parameters as relevant to location vulnerability incl.
Under contract with tetratechard for the us agency for international development usaid. This study emphasizes the importance and needs of looking the phenomena of floods and floods vulnerable area at the national scale in order to fully understand and completely deal with the problem. Therefore the responsible authorities should provide timely and reliable flood warning, flood. The need of research in flood hazard, vulnerability and risk assessment has been stress in literature 30,31. Pdf a gisbased flood vulnerability assessment maureen. Flood vulnerability assessment of ibadan city, oyo state. The contributing percentage for the factors are mean annual rainfall 20%, slope 20%, landuse 20%, relief 15%, drainage density. This study is aimed at mapping flood vulnerable areas within. The estimates are based on collected data and are considered to be the most reliable when compared to the 1. Modelling surface runoff and mapping flood vulnerability of. In doing so, new indices of neighbourhood flood vulnerability and social flood risk are introduced and used to provide a quantitative comparison of the flood risks faced by more and less socially vulnerable neighbourhoods. Flood vulnerability mapping is a necessary prerequisite for comprehensive flood mitigation programs.
In extreme cases, such as the huge floods of 1988 and 1998 they inundated as much as 70% of bangladesh. Adequate geographic information on flood vulnerability is required to be able to prepare for flood disasters. Flash flood mapping to identify sites in high risk flood zones is one of the powerful tools for this purpose. Best practices on flood prevention, protection and mitigation 3 flood forecasting and warning is a prerequisite for successful mitigation of flood damage.
Pdf flood vulnerability mapping in the lower mono river. Gisbased mapping of flood vulnerability and risk in the benin niger river valley idelbert dagbegnon behanzin et al. Climate vulnerability mapping tool data sources mepht. The checklist presented here is an amended version of the checklist that was developed for fema p424, design guide for improving school safety in earthquakes, floods. Lamptey, jean mianikposogbedji abstract the lower mono river basin has been identified as an annual flood hotspot in togo, where human and ecological systems are negatively impacted. An information system for riskvulnerability assessment to. This mapping is very important to be done in the determination of various development policies, such as the development of conservation land, the opening and placement of settlement land, the making of embankments, and other policies. Flood vulnerability analysis using remote sensing and g is. If in a particular river basin, subbasin or stretch of coastline no potential significant flood risk exists or is foreseeable, no further action would have to be taken. The vulnerability analysis and mapping vam unit is an. Flood risk vulnerability and flood zone compatibility.
The estimates are based on collected data and are considered to be the most reliable when compared to the 1year and 3 year estimates. Vulnerability is multidimensional economic, social, demographic, politicalinstitutional and psychological that affect peoples susceptibility to environmental hazard and is influenced by a number of factors, at different levels from the local to the global. This study is aimed at mapping flood vulnerable areas within lokoja metropolis, for an effective flood. The results are validated using flood depth measurements, with a minimum average difference of 0. Vulnerability is the measure of the capacity to weather, resist, or recover from the impacts of a hazard in the long term as well as the short term. Vulnerability is multidimensional economic, social, demographic, politicalinstitutional and psychological that affect peoples susceptibility to environmental hazard and is influenced by a number of factors, at different levels from the local to. Flood vulnerability assessment of ibadan city, oyo state, nigeria. Mar 06, 2014 this guidance on flood risk and coastal change will help local planning. This is because the flood vulnerability class progression in the model coincide with the areas of observable impact as earlier visited on the field when compared with the model. This includes lowering the probability of flooding as well as reducing the vulnerability of the society in flood prone areas. In this context a study on flood risk and vulnerability mapping using gis with a case study of the ratu khola basin was conducted by icimod with the support from unesco. Flood vulnerability mapping in the lower mono river basin in togo, west africa joshua ntajal, benjamin l. Checklist for vulnerability of floodprone sites and buildings t. Almost all the administrative blocks of the district are more or less flood prone.
Introduction flood is an overflow of water submerging land which is usually dry mohammed et al. Checklist for vulnerability of floodprone sites and. In many cases vulnerability assessment va is synonymous with spatial vulnerability assessment, owing in part to an understanding that. This guidance on flood risk and coastal change will help local planning. As a result, this paper focused on the assessment and mapping of the vulnerability of communities to. A key part of risk assessment studies consists in the estimation of the vulnerability of flood. Stepbystep guide to vulnerability hotspots mapping. Mapping flood vulnerability of local communities in pakistan derives the social indicators from the household surveys and relates to the collocated values of various geographical characteristics from remote sensing imagery and gis data sets.
Flood risk and vulnerability mapping using gis mafiadoc. An overview to flood vulnerability assessment methods. Flood modelling in gis is used to produce flood vulnerability maps for flood planning and analysis. Flood vulnerability mapping in the lower mono river basin in. Apr 26, 2016 vulnerability is the main construct in flood risk management. Mapping flash flood will be beneficial to urban and infrastructure planners, risk managers and disaster response or emergency services during extreme and intense rainfall events. It is important to point out that this definition of return period is contrary to what the term 10year flood or 100year flood would seem to imply, i. Flash flood hazard mapping using satellite images and gis. Variety of approaches has been introduced to assess vulnerability therefore selection of more. If apfsr are identified, a full detailed flood hazard and risk assessment should be undertaken.
A methodology for flood susceptibility and vulnerability. Mapping vulnerability in the upper thames watershed under a changing climate final report 2 table of contents 1. The flood information system is designed to provide support for different users, i. Flood vulnerability refers to the unique characteristics of an individual or group in terms of their exposure, susceptibility, and resilience from the impact of flood hazards. It causes damage to lives and natural resources as well as the loss of economy and health. There are various human and territorial factors that influence an areas vulnerability to flooding. Human vulnerability index territorial vulnerability index ranking value hsi ssi r b mpsi mi wii 28 57 forest areas local roads 0. Flood vulnerability mapping of lokoja metropolis using. How to measure vulnerability to flooding flood resilience. Vulnerabilities differs between families in a same village. This study applies geographical information system techniques to produce flood vulnerability map of lokoja metropolis due to its confluence nature and its potential to cause devastating effect to the surrounding communities.
Gisbased mapping of flood vulnerability and risk in the. Checklist for vulnerability of flood prone sites and buildings vulnerability considerations guidance observations siting conditions is the site near a body of water with or without a mapped flood hazard area. This report was produced under united states agency for international development usaid cooperative agreement no. Vulnerability is an important concept in food security. Spatial flood potential mapping with flood probability and. Flood modelling and vulnerability assessment of settlements. A gisbased support vector machine model for flash flood. Vulnerability there is a relationship between exposure to a flood h azard, risk the next topic of this chapter, and vulnerability. Vulnerability, impacts and adaptation provia 20 highlights measuring and mapping vulnerability as a first priority for supporting adaptation decisionmaking. Spatial flood potential mapping with flood probability and exposure indicators of flood vulnerability. One of the most significant aims of flood vulnerability assessment is to make a clear association between the theoretical conceptions of flood vulnerability and the daily administrative process. From the vulnerability mapping, urban flood risk index ufri for the case study area, which. Its effectiveness depends on the level of preparedness and correct response.
A case study from west bengal, india flood is an annual event in the district of jalpaiguri. Flood vulnerability, risk, and social disadvantage. You should consider the flood mapping available from the. Available data content format sources spatial distribution of the intensity level of flood hazard for the benin at 1km resolution. This study illustrates the flood vulnerability mapping to riverine floods in the old brahmaputra river in mymensingh sadar upazila. Mapping floodvulnerability in bangladesh on average, every year, floods engulf roughly 20. Variety of approaches has been introduced to assess vulnerability therefore selection of more appropriate methodology is vital for. The american community survey acs 5year 20122016 estimates were used for the demographic data presented in the vulnerability mapping tool. The flood risk vulnerability mapping follows a multiparametric approach and integrates some of the flooding causative factors such as rainfall distribution, elevation and slope, drainage network and density, landuselandcover and soil type. Mapping flood vulnerability from socioeconomic classes and. Pdf urban flood vulnerability and risk mapping using.
Flood hazard assessments usually aim to estimate the flood intensity for a range of exceedance probabilities, for example from 0. Modellingsurfacerunoffandmappingfloodvulnerability inlagosstatefromdigitalelevation model. Mapping flood vulnerability floods have a high impact in densely populated areas, especially when strategic infrastructure is affected. Susceptibility is the tendency of individuals and their belonging. From the vulnerability mapping, urban flood risk index ufri for the case study area, which is determined by the degree of vulnerability and exposure is also derived. Flood risk management aims at preventing losses and damages by preventing flooding andor by preventing the exposure of people and property to flooding.
Exposure refers to individuals and their surroundings in floodprone space that are subject to potential losses from a flood event. In this exercise flood depth is considered crucial for flood hazard mapping and a digital elevation model dem is considered to be the most effective means to estimate flood depth from remotely sensed or hydrological data. Vulnerability is the main construct in flood risk management. University of lagos, nigeria abstract the devastating flood occurrence and its impact on the people have been of great concern to man. Lamptey, jean mianikposogbedji abstract the lower mono river basin has been identified as an annual flood hotspot in togo, where human and. An information system for riskvulnerability assessment to flood. Handbook on good practices for flood mapping in europe. Urban flood vulnerability and risk mapping using integrated. Capacity to adapt to floods 10 vulnerability 10 vulnerability assessments 12 indicators of vulnerability 12 geographic information systems 20 4. A gisbased support vector machine model for flash flood vulnerability assessment and mapping in china junnan xiong 1,2, jin li 1, weiming cheng 2,3,4, nan wang 2 and liang guo 5 1 school of civil engineering and architecture, southwest petroleum university, chengdu 610500, china.
Mapping flood vulnerability from socioeconomic classes and gi. Flood vulnerability mapping using geospatial technique for. This includes lowering the probability of flooding as well as reducing the vulnerability of the society in floodprone areas. Center for international earth science information network ciesin, the earth institute, columbia university. Flood, vulnerability, control, mapping, geospatial and multicriteria 1. Study area the 532 km2 ratu watershed extends from the siwaliks at the elevation of 800 m in the north to the indonepal border in the south at the elevation of 61 m with a. Intensive agricultural activity and large urbanised areas are examples of such human factors, while.
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