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Nonlinear dynamics and multifractal analysis of minimum–maximum temperature and solar radiation over Lagos State, Nigeria

Akinsusi Joshua, Ogunjo Samuel, Fuwape Ibiyinka

Acta Geophysica

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2022

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Vol. 70, no 5

2171--2178

EN

This study focuses on investigating the chaotic and multifractal behavior of atmospheric time series of solar radiation (solar), maximum temperature (Tmax), and minimum temperature (Tmin) over Lagos State for a period of 24 years. Chaotic quantifiers such as sample entropy, Lyapunov exponent, and correlation dimension were employed to unveil the chaotic nature of the time series. Values of Lyapunov exponents obtained for the three parameters were in the range 0.251–0.261, which confirms chaos in the time series. The scaling properties of the time series were revealed by applying the Multifractal Detrended Fluctuation Analysis (MFDFA). Based on the multifractal strength, we infer that the dynamics of solar radiation (0.932) is different from that of maximum temperature (0.155) and minimum temperature (0.198). The time series have a long-range correlation and broad probability distribution. Results obtained showed that the time series is chaotic and exhibited a multifractal behavior. The results also show that chaotic and multifractal analyses are useful in unveiling the complex dynamics of the atmosphere.

2

Prioritisation of ferry commuters’ needs in Lagos metropolis: an analytical hierarchical process approach

Hart Eke Christy, Adebiyi Sulaimon Olanrewaju, Oyenuga Olamilekan Gbenga

Zeszyty Naukowe. Transport / Politechnika Śląska

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2020

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z. 107

53--71

EN

Understanding the needs of ferry service commuters cannot be overemphasis, considering the fact that the survival of any business largely depends on the volume of its customer base, and how well they are satisfied with the level of services received. More so, owing to the high population of Lagos state and usual traffic congestion across main roads during the peak periods, water transportation via ferries undoubtedly becomes a viable alternative to ensure stakeholders satisfaction in urban planning for a city majorly surrounded by water providers. Thus, this study employs the analytical hierarchy process (AHP) to prioritise the ferry services needs of commuters to make effective managerial decisions that will aid efficiency in their operations, thereby, increasing the market penetration, competitive edge and commuter satisfaction. A sample size of two hundred and four was computed through purposive sampling procedure. The data retrieved were analysed using pairwise comparison in line with AHP methodology. The study found out that among the criteria measured, comfort was perceived more important to commuters compared to its pairs. In addition, recreational facilities, ease of online payment, regular maintenance of waterways and seating with good legroom were ranked high by the commuters. Therefore, to ensure a sustainable competitive advantage over other modes of transportation, these indicators need to be effectively considered in water transportation policy.

3

Determinants of travel behaviour in taxi transport system of Lagos Metropolis of Nigeria

Aiyegbajeje Femi Ola

Prace Komisji Geografii Komunikacji PTG

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2019

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nr 22(1)

13--21

EN

Literatures have stressed the importance of mode choice preference in accurately predicting the future travel demand. Despite having diverse travel needs and challenges coupled with the proliferation of informal operation of car hire services in Lagos over the years, there is still a lack of knowledge and understanding of the intra-mode use behaviour of Lagos metropolitan residents of taxi services. This is necessary to address the numerous challenges posed by inadequate transport supply within the Lagos metropolis. Using the availability of the traditional taxi (Lagos yellow cabs), Uber, Bolt, this study examines the factors that drive a sustainable intra-modal competition through the mode choice behaviour of a diverse Lagos population with residents sampled from selected areas where all the three modes operate within the Lagos metropolis. A structured questionnaire form was administered randomly to 174 commuters to find out the reasons behind their preference and their perception of the service delivery of ride service hailing operators in comparison to the traditional taxi (Lagos yellow cabs). The study revealed that Uber had the highest preference (41.3%) followed by Bolt (36.8%) with yellow cabs recording only 6.9%. Service charge (cost) for taxi service was responsible for 74.1% of intra-modal preferences. The stepwise multiple regression results further revealed that easy access to Uber and Bolt (through the use of ride-sharing apps) and service charge had significant influence on passengers’ intra-mode preference. The study suggests that government should step up action at reviving the ‘yellow cabs’ to boost access to taxi services within Lagos metropolis.

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Assessment of Shoreline and Associated Landuse/Land cover Changes along Part of Lagos Coastline, Nigeria

Akinluyi F. O., Adebola A. O., Adeseko A. A.

Contemporary Trends in Geoscience

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2018

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Vol. 7, iss. 1

59--71

EN

The city of Lagos, Nigeria has undergone rapid increase in population due to economic and commercial activities. As a result of this, there has been a persistent change in Land use/Land cover (LULC) of the city and shoreline through the years. This observation necessitated the use of multi-temporal satellite data to characterize shoreline changes between 1984 and 2016. Therefore, the study attempts to determine the shoreline change during the study period and the coastal land use and land cover (LULC) of the study area. Satellite data was acquired and subjected to some image processing techniques such as image enhancement, supervised classification, and shoreline extraction. The digital shoreline analysis system (DSAS) in ArcGIS environment was utilized to cast transects and calculate statistical parameters for the shoreline and spatial data used was Landsat TM, ETM and OLI for the years 1984, 1990, 2000, 2004 and 2016 respectively. The results indicate that LULC changes in built-up areas increases rapidly during the years (1984-2015) from 12.2 -36.2%, water bodies increased from (1984-1990-2000) from 52%, 54%, 52% and reduces to 47.4% in the year 2015 while vegetation cover reduces drastically through the year range from 36%, 33%, 29%, 24% and 16%. A total of 1034 transects were generated with 100m spacing and the average rate of change was calculated for the 32 year period (1984-2016). The linear regression rate (LRR) shoreline result shows a mean of -0.59m/year where 73.1% of transect fall under erosion and 61.8% accretion respectively. The end point rate (EPR) and net shoreline movement (NSM) analysis revealed mean shoreline change of -0.57m/year and -18.1m/period respectively from 1984-2016. The EPR and NSM results both revealed that 231 transect or 22.3% experienced erosion, and 805 transect or 77.9% with accretion. It was observed that significant accretion rate recorded along most sections of the shorelines is attributed to beach nourishment activities.

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Behavioral pattern of commercial public transport passengers in Lagos metropolis

Afolabi O. J., Hassan A. M., Age L. O.

Journal of Sustainable Development of Transport and Logistics

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2017

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Vol. 2, No. 1

40--50

EN

This study examined the travel behawior of commercial public transport passengers in Lagos State, Nigeria. The descriptive research survey was used in order to assess the opinions of the respondents using the questionnaire. A total of 84 samples were used as representative population, while two null hypotheses were formulated and tested using the Pearson Product Moment Correlation Coefficient at 0.05 level of significant. The results that were obtained indicated that a positive correlation exists between frequency of travel and commuters income in Lagos Metropolis and also that a positive correlation exists between frequency of travel and distance covered by commuters in Lagos Metropolis. Secondary data was also sourced to serve as complement to the primary data, thus allowing for a robust research. Descriptive statistical tools such as percentages were also adopted to present the socio-economic characteristics in the area. Findings showed that about 57% of sampled population are male, 62 % are civil servants, 48% of respondents travel for business purposes. Also, that majority of the respondents (50%) said that the commercial public transport is highly prone to accident, while about 64% of the respondents commute on daily basis. It was established that lack of transport infrastructure coupled with poor road maintenance were seen as the leading causes of inaccessibility of the area.