An Assessment of Flood Vulnerability Zones in the Niger Delta, Nigeria

Ologunorisa, Temi E.

doi:10.1080/0020723032000130061

Cited by 82 publications

(47 citation statements)

References 5 publications

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“…There are three categories at which streams can be grouped according to their orders; headwaters (Stream order 1 to 3), medium-sized streams (Stream order 4 to 6) and larger rivers (Stream order greater than 6). Stream order is also an important part of the River Continuum Concept [12][13][14][15]. The River Continuum Concept is a model used to determine the biotic community expected in a stream, based on the size of the stream itself.…”

Section: Resultsmentioning

confidence: 99%

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Adeyeri¹,

Ishola²,

Ec³

2017

J Coast Zone Manag

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Journal of Coastal Zone Management AbstractThe pressures caused by anthropogenic activities such as housing development and road construction, oil and gas exploration, economic development and demographic changes, have partly fuelled several environmental challenges faced in the coastal areas of Nigeria. One of these challenges is the flood events which have recently caused damage of properties and loss of lives in the areas. This study examines and predicts the susceptibility of the coastal region of Nigeria to flood hazard in a changing climate using geo-spatial techniques. Topographic maps and Moderateresolution imaging spectroradiometer (MODIS) image of 2015 were processed, digitized, interpolated, classified and overlaid using the suitable algorithms. The MODIS imagery was classified into suitable land cover classes using the supervised maximum likelihood scheme. The 3D-analyst module was used to generate the Hydrological Digital Elevation Model (HDEM), Triangulated Irregular Network (TIN), and flood risk map of the study area. The flood risk map was classified into high, medium, low, and no risk zones. Results showed that, areas lying along the banks of Guinea coast are highly susceptible to flood hazards with the degree of susceptibility decreasing towards the North and eastern part of the area. These areas are classified as swamps (water-log) with low water retention which gives rise to high susceptibility of coastal flood hazards. The study discovered that the flood risk map can be used as an effective tool for precautionary measures, early warning systems, and consequently reduce the damages that could be caused by flood events.

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Section: Resultsmentioning

confidence: 99%

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Adeyeri¹,

Ishola²,

Ec³

2017

J Coast Zone Manag

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“…However, for sound risk management to occur, Ologunorisa (2004) asserts that, there should be a forth step, (iv) which addresses the need to take post audits of all risk assessment exercises. When risk analysis is undertaken, risk (R) is taken as some product of probability (P) and (L) the scale of occurrence.…”

Section: The Concept Of Riskmentioning

confidence: 99%

Flood Risk Assessment of Residential Neighbourhoods in Calabar Metropolis, Cross River State, Nigeria

Ojikpong

Ekeng

Obonga

et al. 2016

ENRR

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The study is aimed at examining the vulnerability of some residential neighbourhoods in Calabar to the menace of flooding with a view to determining residential areas of high, medium and low flood risk. Two hypotheses were formulated such as: there is no significant relationship between the magnitude of flood, and the vulnerability of residential neighbourhoods and the elements-at-risk to flood in residential neighbourhoods in Calabar do not vary significantly according to the topography of the area. The major primary data were obtained from the metric measurement of the coverage of flood and the assessment of the numerical value of the residential buildings considered vulnerable to flood within the areas measured. Secondary data were also obtained from the collection of both published and unpublished materials and data on flooded buildings and displaced persons were also obtained from the State Emergency Management Agency (SEMA), Calabar. The data were analyzed using descriptive statistics and hypotheses tested using the regression coefficient of the least square method and scatter grams for prediction. The results of the hypotheses were found to be significant as the magnitude of flood determined the vulnerability of some residential neighbourhoods. Vulnerability was found to be higher in low lying residential neighbourhoods. The study, however, recommends among others, planned and autonomous adaptation responses, flood plain zoning to urban agriculture, landscaping and recreational uses. Proper channelization of Calabar urban drainage system, stringent flood control legislation, and development control measures should be enforced so as to discourage people from building on or near flood-prone areas of Calabar.

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“…Flood risk is a function and a product of hazard and vulnerability (Ologunorisa, 2004). Flood risk is a result of the combination of the flood hazard and the consequences of the flooding.…”

Section: Risk Assessmentmentioning

confidence: 99%

Brief communication "Determination of urban growth in catchment areas in Cyprus using multi-temporal remotely sensed data: risk assessment study"

Hadjimitsis

2010

Nat. Hazards Earth Syst. Sci.

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Abstract.The aim of this study is to quantify the actual urbanization activity near the catchment area in the urban area of interest located in the vicinity of the Agriokalamin River area of Kissonerga Village in Paphos District. Remotely sensed data such as aerial photos, Landsat-5/7 TM/ETM+ and Quickbird image data have been used to track the urbanization activity from 1963 to 2008. In-situ GPS measurements have been used to locate in-situ the boundaries of the catchment area. The results clearly illustrate that tremendous urban development has taken place ranging from 0.9 to 33% from 1963 to 2008, respectively. A flood risk assessment and hydraulic analysis were also performed.

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An Assessment of Flood Vulnerability Zones in the Niger Delta, Nigeria

Cited by 82 publications

References 5 publications

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Flood Risk Assessment of Residential Neighbourhoods in Calabar Metropolis, Cross River State, Nigeria

Brief communication "Determination of urban growth in catchment areas in Cyprus using multi-temporal remotely sensed data: risk assessment study"

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An Assessment of Flood Vulnerability Zones in the Niger Delta, Nigeria

Cited by 82 publications

References 5 publications

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Climate Change and Coastal Floods: The Susceptibility of Coastal Areas of Nigeria

Flood Risk Assessment of Residential Neighbourhoods in Calabar Metropolis, Cross River State, Nigeria

Brief communication &quot;Determination of urban growth in catchment areas in Cyprus using multi-temporal remotely sensed data: risk assessment study&quot;

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Brief communication "Determination of urban growth in catchment areas in Cyprus using multi-temporal remotely sensed data: risk assessment study"