Yusuf A. Lahai¹, Prince S. Lahai Jr.²

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¹ Department of Geology, Faculty of Pure and Applied Sciences, Fourah Bay College, University of Sierra Leone, Freetown, Sierra Leone.
² Department of Library, Fourah Bay College, University of Sierra Leone, Freetown, Sierra Leone.
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Abstract: In the event of natural disasters, Sierra Leone like any other country loses lives as well as properties and natural resources. Despite notable occurrences of small disasters in the country, only on August 14th sugarloaf landslide and the resulting flash flood (twin disasters) which affected Regent and other communities in 2017 have captured both national and international attention due to their alarming impacts. To obtain a better knowledge on the nature of the disasters, this research considered the geological context of the landslide and focused on statistical analysis of the impacts of the twin disasters using Statistical Package for Social Sciences (SPSS). Geological field-based approach and self-administered questionnaires of both closed and open-ended questions, personal interviews and observations were adopted as research techniques. Descriptive statistics and qualitative analysis were used to analyze the data of the research. Relevant literature from books, journals, and newspapers was also consulted, including Radio, Television discussions and the internet. Slope destabilization that caused the Landslide was linked to the geology of sub-surface formation (highly weathered olivine gabbro), lineaments and the rate of weathering. Study showed remarkable economic, social and political impacts as a consequence of the twin disasters. Study also revealed that families assisted the most in both financial and non-financial ways to the victims, and renowned misappropriation of donated disaster funds. All variables tested using student t-distribution and chi-square test of independence accepted the hypothesis. Information obtained from this work could be fundamental for policy makers and development practitioners (Osuteye & Leck, 2017).

Keywords: Geological Context, Natural Disaster, SPSS, Slope Destabilization, Statistical Analysis

Cite this paper: Lahai, Y. and Lahai Jr., P. (2019) Geological Context and Statistical Assessment of the Impacts of Sugarloaf Twin Disasters, in Western Sierra Leone. Journal of Geoscience and Environment Protection, 7, 226-247. doi: 10.4236/gep.2019.76017.

References

[1]   Amnesty International (2017). Sierra Leone: Housing and Environmental Failures behinds Shocking Scale of Mudslide Death.

[2]   Bangura, M. (2017). Mudslide and Flooding in Sierra Leone.

[3]   Baraytay, A. (2017). Presidential Diary on the Effect of Mudslide and Flooding in Sierra Leone.

[4]   BBC British Broadcasting Corporation (2017). A Disaster Waiting to Happen in Freetown.

[5]   BGS British Geological Survey (2017). Sierra Leone Disaster Response.
http://www.bgs.ac.uk

[6]   BGS British Geological Survey (2018). Landslide and Earth Observation; Power Point Presentation by David Boon.

[7]   Chalokwu, C. I. (2001). Petrology of the Freetown-Layered Complex, Sierra Leone: Part II Magma Evolution and Crystallization Conditions. Journal of African Earth Sciences, 32, 519-540.
https://doi.org/10.1016/S0899-5362(01)90112-5

[8]   Dumbuya, I. (2018). Proactive Measure by Government Officials Could Have Saved Victims at Regent Mudslide (p. 17). Standard Times Newspaper, 31st May.

[9]   Economic-Freedom Index (2009). Transparency International Corruption Perception Index 2007.
http://www.heritage.org/Index/country/SierraLeone

[10]   Egbejule, E. (2017). Mudslide in Sierra Leone Exposes Dangers of Freetown’s Unchecked Sprawl, 2017. Freetown: Thomson Reuters Foundation.

[11]   Feizizadeh, B., & Blaschke, T. (2011). Landslide Risk Assessment Based on GIS Multi-Criteria Evaluation: A Case Study in Bostanabad County, Iran. Journal of Earth Science and Engineering, 1, 66-71.

[12]   Free Encyclopedia (2017). The Causes and Effect of Natural Disaster.

[13]   Freetown City Council (2014). The Environmental Assessment and Evaluation of Natural Disaster Risk and Evaluation of Natural Disaster Risk and Mitigation in Freetown. Urban Planning Project 2011-14, Financed by the European Union, Freetown: Freetown City Council (FCC) and the Ministry of Lands, Country Planning and the Environment (MLCPE).

[14]   Gibbins, J. (2017). The Magnitude of Natural Disaster in Sierra Leone since 2013-2017.

[15]   Igwe, O. (2017). Report Made on Africa Landslide Disaster, 2017; A Senior Lecturer at the University of Nigeria-Landslide Expert.

[16]   Kamara, K. (2017a). Mudslide at Pentagon a New Settlement Two Miles from Mudslide.

[17]   Kamara, Y. (2017b). Flooding at Kamayama Community.

[18]   Mansaray, A. (2017). Flooding at Kaningo Community.

[19]   McAllister, E. (2017). Cities across Africa Face Threat of Landslides like Sierra Leone, 2017.

[20]   McCarthy, J. (2017). Sierra Leone Mudslides Was a Man-Made Tragedy That Could Have Been Prevented.

[21]   Ministry of Information & Communication (2016). The Country Year Book of Sierra Leone. Freetown: Hamilton Wise Communication Ltd.

[22]   Mitchell, H. (2017). I’ve Seen How Perilous Life in Sierra Leone Can Be. We Cannot Ignore This Disaster. The Guardian Tabloid.

[23]   NEC National Electoral Commission (2017). The Impacts of August 14th Twin Disasters in Freetown, Sierra Leone.

[24]   Nsengiyumva, J. B., Luo, G., Nahayo, L., Huang, X., & Cai, P. (2018). Landslide Susceptibility Assessment Using Spatial Multi-Criteria Evaluation Model in Rwanda. International Journal of Environmental Research and Public Health, 3, 23-67.
https://doi.org/10.3390/ijerph15020243

[25]   Osuteye, E., & Leck, H. (2017). Freetown’s Mudslides and the Slippery Slope of Urban Risk in Africa. Sierra Leone Telegraph-Sierra Leone News.

[26]   Ramakrishnan, S. S., Sanjeevi Kumar, V., Zaffar Sadique, M. G. S. M., Arulraj, M., & Venugopal, K. (2002). Landslide Disaster Management and Planning—A GIS Based Approach.

[27]   Roy-Macauley, C. (2017). At Least 300 Dead in Sierra Leone Mudslide and Flooding. Freetown: Associated Press.

[28]   Salkind, N. J. (2006). Exploring Research (4th ed.). Upper Saddle River, NJ: Prentice Hall.

[29]   Sierra Leone Disaster Management Policy (2006). Final Draft on Disaster Management Policy.

[30]   Sierra Leone MoFED (2017). Disaster Management Funds.

[31]   Sierra Leone MoFED (2018). Request for Expression of Interest: Emergency Recovery Project (pp. 6-7). Global Times Newspaper, 31st May.

[32]   Sillah, S., & Williams, B. (2017). Geological Observation of the Epicentre of the Landslide Disaster Zone. Situation Report, Freetown Landslide: Sierra Leone Institution of Scientists.

[33]   UN/OCHA United Nations Office for Coordination of Humanitarian Affairs (2017). Sierra Leone: Landslide and Floods Situation Update. UN Country Team in Sierra Leone.

[34]   UNDP & EPA (2017). Technical Publication: Analysis of the Causal and Trigger Factors of the August 20s17 Landslide Risk Management in Freetown, Sierra Leone. Freetown: United Nations Development Programme and Environmental Protection Agency.

[35]   UNDP (2015). Sierra Leone Millennium Development Goal. Freetown: United Nation Development Programme.

[36]   USGS U.S. Geological Survey (2015). Help Build Safer Communities, Science for a Changing World.

[37]   Westen, C. J. (2000). The Modelling of Landslide Hazards Using GIS. Surveys in Geophysics, 21, 241-255.
https://doi.org/10.1023/A:1006794127521

[38]   World Bank (2017). Sugarloaf Landslide and Floods Rapid Damage and Loss Assessment in Western Sierra Leone. A Presentation.