Geophysical investigation of Obot Ekpo Landslide site, Cross River State, Nigeria

Akpan, Anthony E.; Ilori, Abidemi Olujide; Essien, N.

doi:10.1016/j.jafrearsci.2015.05.015

Cited by 29 publications

(11 citation statements)

References 95 publications

(117 reference statements)

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“…In developing countries, urban growth is often so rapid that the unregulated development of large, unplanned settlements can directly result in an increased risk from fluvial-geomorphological hazards (e.g. Akpan et al 2015). For example, during intense rainfall events, the underlying soils and steep slopes often destabilise and can result in devastating landslides with significant loss of life and economic cost (Kometa and Akoh 2012, Akpan et al 2015, Laribi et al 2015.…”

Section: Physical/geomorphic Impactsmentioning

confidence: 99%

“…Akpan et al 2015). For example, during intense rainfall events, the underlying soils and steep slopes often destabilise and can result in devastating landslides with significant loss of life and economic cost (Kometa and Akoh 2012, Akpan et al 2015, Laribi et al 2015. The depletion of groundwater via overpumping can also trigger the emergence of large sinkholes by removing the supporting buoyancy of groundwater, resulting in the emergence of underground cavities beneath densely populated urban areas (Al-Kouri et al 2013).…”

Section: Physical/geomorphic Impactsmentioning

confidence: 99%

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Impacts of urbanisation on hydrological and water quality dynamics, and urban water management: a review

McGrane

2016

Hydrological Sciences Journal

625

230

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As urban space continues to expand to accommodate a growing global population, there remains a real need to quantify and qualify the impacts of urban space on natural processes. The expansion of global urban areas has resulted in marked alterations to natural processes, environmental quality and natural resource consumption. The urban landscape influences infiltration and evapotranspiration, complicating our capacity to quantify their dynamics across a heterogeneous landscape at contrasting scales. Impervious surfaces exacerbate runoff processes, whereas runoff from pervious areas remains uncertain owing to variable infiltration dynamics. Increasingly, the link between the natural hydrological cycle and engineered water cycle has been made, realising the contributions from leaky infrastructure to recharge and runoff rates. Urban landscapes are host to a suite of contaminants that impact on water quality, where novel contaminants continue to pose new challenges to monitoring and treatment regimes. This review seeks to assess the major advances and remaining challenges that remain within the growing field of urban hydrology. ARTICLE HISTORY

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Section: Physical/geomorphic Impactsmentioning

confidence: 99%

Section: Physical/geomorphic Impactsmentioning

confidence: 99%

Impacts of urbanisation on hydrological and water quality dynamics, and urban water management: a review

McGrane

2016

Hydrological Sciences Journal

625

230

View full text Add to dashboard Cite

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“…Authors agree that seismic wave velocities and soil ER could be useful in identifying anomalies related to structural (faults, fissures, and stability), lithological (sand to clay or calcareous variations) and hydrological (moisture, water flow) conditions [42,123,143]. However, drillings and inclinometer measurements are still crucial to providing a reliable idea of landslide structures and slip surfaces and to validate any geophysical measurements.…”

Section: Drawback 5: Efforts Should Also Be Made Towards Obtaining Qumentioning

confidence: 99%

A Review of the Advantages and Limitations of Geophysical Investigations in Landslide Studies

Pazzi

Morelli

Fanti

2019

International Journal of Geophysics

110

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Landslide deformations involve approximately all geological materials (natural rocks, soil, artificial fill, or combinations of these materials) and can occur and develop in a large variety of volumes and shapes. The characterization of the material inhomogeneities and their properties, the study of the deformation processes, and the delimitation of boundaries and potential slip surfaces are not simple goals. Since the ‘70s, the international community (mainly geophysicists and lower geologists and geological engineers) has begun to employ, together with other techniques, geophysical methods to characterize and monitor landslides. Both the associated advantages and limitations have been highlighted over the years, and some drawbacks are still open. This review is focused on works of the last twelve years (2007-2018), and the main goal is to analyse the geophysical community efforts toward overcoming the geophysical technique limitations highlighted in the 2007 geophysics and landslide review. To achieve this aim, contrary to previous reviews that analysed the advantages and limitations of each technique using a “technique approach,” the analysis was carried out using a “material landslide approach” on the basis of the more recent landslides classification.

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“…It is a common knowledge among earth scientists that different parts of the world experience varying intensities of seismic related activities and natural disasters. The intensities of these events which include volcanic eruptions, landslides, earthquakes and tsunamis depend on the geophysical and geological features of the region where they occur (Akpan et al 2015). Tectonic activities occurring beneath the earth's surface are the major causative factors of these events resulting in disturbances which have devastating effects on the earth surface (Elnashai and Sarno 2008).…”

Section: Introductionmentioning

confidence: 99%

Critical evaluation of seismic activities in Africa and curtailment policies – a review

Alaneme

Okotete

2018

Geoenviron Disasters

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The present paper discusses the seismicity of Africa and the need for the implementation of vibration control strategies in Africa, erroneously considered as aseismic. The review catalogues information on the seismicity of Africa, attesting that virtually every region in the African continent has come under the threat of some form of seismic event. The magnitudes and intensities of these seismic activities has resulted in devastations, including: loss of lives, building and civil structures collapse, displacements of people, economic losses, psychological traumatization, and grave fear. Evidences available show that most of the devastations are accentuated by tremor induced collapse of buildings and civil structures. It is thus imperative for substantive, simply implementable, and sustainable proactive measures for controlling the threats of seismic events be discussed within the African context. Current mitigation strategies in Africa include the establishment of seismic codes which govern the design of civil structures. The challenge to the implementation and the effectiveness of the existing African seismic codes was briefly discussed, and new measures which can reduce seismic risks were also highlighted The submissions of the paper is envisaged will create awareness on the budding seismic activities in Africa and awaken relevant authorities on the need for timely and practicable mitigation strategies to be in place to avert the attendant catastrophes associated with seismic occurrences.

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Geophysical investigation of Obot Ekpo Landslide site, Cross River State, Nigeria

Cited by 29 publications

References 95 publications

Impacts of urbanisation on hydrological and water quality dynamics, and urban water management: a review

Impacts of urbanisation on hydrological and water quality dynamics, and urban water management: a review

A Review of the Advantages and Limitations of Geophysical Investigations in Landslide Studies

Critical evaluation of seismic activities in Africa and curtailment policies – a review

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