Potential Impacts of Climate Change on Extreme Weather Events in the Niger Delta Part of Nigeria

Hassan, Ibrahim; Kalin, Robert M.; Aladejana, Jamiu A.; White, Christopher J.

doi:10.3390/hydrology7010019

Cited by 18 publications

(10 citation statements)

References 27 publications

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“…Due to these climate changes and variations, frequent extreme climatic disasters, such as flood and droughts, have occurred. ey have resulted in severe adverse impacts on infrastructure, dams, urban drainage systems, and livelihood of human, animals, and vegetation [6,7]. It has been found out that multiday rainfall events have massively contributed to the extreme floods [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka

Perera

Ranasinghe

Gunathilake

et al. 2020

Advances in Meteorology

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Identifying rainfall trends in highly urbanized area is extremely important for various planning and implementation activities, including designing, maintaining and controlling of water distribution networks and sewer networks and mitigating flood damages. However, different available methods in trend analysis may produce comparable and contrasting results. Therefore, this paper presents an attempt in comparing some of the trend analysis methods using one of the highly urbanized areas in Sri Lanka, Colombo. Recorded rainfall data for 10 gauging stations for 30 years were tested using the MannKendall test, Sen’s slope estimator, Spearman’s rho test, and innovative graphical method. Results showcased comparable findings among three trend identification methods. Even though the graphical method is easier, it is advised to use it with a proper statistical method due to its identification difficulties when the data scatter has some outliers. Nevertheless, it was found herein that Colombo is under a downward rainfall trend in the month of July where the area receives its major rainfall events. In addition, the area has several upward rainfall trends over the minor seasons and in the annual scale. Therefore, the water management activities in the area have to be revisited for a sustainable use of water resources.

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Section: Introductionmentioning

confidence: 99%

Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka

Perera

Ranasinghe

Gunathilake

et al. 2020

Advances in Meteorology

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“…Both the JJA and SON seasons will experience a signi cant and severe increase in precipitation extremes, with higher magnitude recorded in the SON season. Speci cally, Hassan et al, [20] used the downscaled CMIP5 model to demonstrate that mean precipitation will increase signi cantly in July-August-September in most parts of the Niger-Delta region. This indicates that water vapour will be more abundant during the July-August-September season in the near future.…”

Section: Annual and Seasonal Dependent Changes In Precipitation Extremesmentioning

confidence: 99%

Projected near-future changes in precipitation extremes over Anambra-Imo River Basin inferred from CMIP6 HighResMIP

Ibe,

Dike,

Ishaya

et al. 2024

Preprint

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The southeastern region of Nigeria is susceptible to flood disasters primarily triggered by extreme precipitation with localized impacts. This study uses the Coupled Model Intercomparison Project Phase 6 (CMIP6), High-Resolution Model Intercomparison Project (HighResMIP) to investigate seasonal dependent changes in precipitation extremes in the near future (2031–2050) in the Anambra-Imo River Basin, in the southeastern region of Nigeria. Evaluating the models against observation for the 1995–2014 period, it is found that models creditably reproduced the spatial pattern of the observed annual precipitation extremes over the river basin. Results show that in the near future, annual precipitation extremes will be characterized by a robust increase in annual total precipitation amount (PRCPTOT), maximum 5-day precipitation (RX5day), and heavy precipitation (R10mm). Meanwhile, the models project a significant increase in PRCPTOT, RX5day, R10mm, and wet-day intensity (SDII) for the June-July-August (JJA) and September-October-November (SON) seasons. The results demonstrate a robust and higher magnitude increase in precipitation extremes during the SON season. Specifically, PRCPTOT, RX5day, R10mm and SDII are projected to increase by up to 46 mm, 24 mm, 1.2 days and 2.4 mm/day, respectively. Whereas during the March-April-May (MAM) season, the HighResMIP suggests that PRCPTOT, R10mm, and SDII will marginally increase over the eastern part of the Anambra-Imo River Basin. Besides, the December-January-February (DJF) season will be characterized by a marginal increase in the precipitation extremes, especially over the southern fringes of the river basin. We note that in the near future, precipitation extremes in the river basin will be characterized by more intense and less frequent precipitation extremes during the JJA and SON, potentially exacerbating flash flooding in the river basin. Hence, the results of this study may be vital for near-term socio-economic planning and policy decisions that will minimize the impact of flood disasters in the Anambra-Imo River Basin.

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“…In this study, six (6) major waste dumpsites, five (5) located in Rivers State (Eleme, Eliozu, Eneka, Oyigbo, Woji) and one (1) located in Bayelsa state (Yenagoa), South-South, Nigeria were selected as shown in Figure 1. The study site is characterized by tropical dry seasons (November to February) and wet seasons (March to October) with a mean annual rainfall increasing from 2000 mm around the northern border to about 4500 mm around the coastal margin [27]. The dumpsites are surrounded by residential houses, factories, gasoline stations, auto spare parts market and auto repair workshops as these expose residents, rag-pickers passer-by including infants to soil and water contaminants by inhalation, ingestion and dermal contacts.…”

Section: Description Of Study Sitementioning

confidence: 99%

Pollution investigation and risk assessment of polycyclic aromatic hydrocarbons in soil and water from selected dumpsite locations in rivers and Bayelsa State, Nigeria

Okechukwu

Omokpariola

Onwukeme

et al. 2021

Environ Anal Health Toxicol

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The transfer ratio of polycyclic aromatic hydrocarbons (PAHs) from soil dumpsite to borehole water is dependent of polluting source and exposure matrices that causes immerse health risk to man and environment over a period of time. PAHs were assessed in selected soil dumpsite and borehole water located at Rivers state (Eleme, Eliozu, Eneka, Oyigbo, and Woji) and Bayelsa state (Yenagoa), Nigeria. Soil samples were collected at four different points 30 m (North, South, East and West) locations at a depth of 15 cm for each dumpsite using soil auger while control samples were collected 200 m away (farmland), where there were little anthropogenic activities and no presence of active dumpsites. Borehole water samples were collected from 300 m distance, which were packaged in an amber container, labeled, and transported to the laboratory for analysis. Standard analytical methods were employed. PAHs concentrations were analyzed using gas chromatography- mass spectrometry (GC-MS) after extraction of water and soil using liquid-liquid and soxhlet extraction methods respectively and clean-up of the extracts, thereafter the laboratory data generated were subjected to statistical analysis. Total PAHs (ΣPAHS) concentrations in soil samples from the study sites ranged from 2.4294 mg/kg in Yenagoa to 5.1662 mg/kg in Eleme while in water samples the total PAHs ranged from 1.3935 mg/L in Woji to 3.009 mg/L in Eleme. The total PAH concentrations in the soil were above the Agency for Toxic Substances and Disease Registry levels of 1.0 mg/kg for a considerably contaminated site except for the control sites. The total concentration of carcinogenic PAHs ranged from 0.0038 to 1.1301mg/kg in soil samples and 0.0014 to 0.9429 mg/L in borehole water samples, therefore raising concern of human exposure via food chain. The results indicate that low molecular weight PAHs were more dominant than high molecular weight PAHs in both soil and water samples, however molecular diagnostic ratio shows that pyrogenic activities are major sources of PAHs as compared to petrogenic origin. Multivariate analysis (principal component analysis and Pearson correlation) showed strong negative correlation implying that they were from dissimilar sources and different migratory route. Cancer and non-cancer risk showed that children were more at risk compared to adults, where inhalation exposure were major contribution as compared to ingestion and dermal exposure, as such there is a need to implement regulatory laws on indiscriminate release of PAHs contaminants to maintain sustainability.

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Potential Impacts of Climate Change on Extreme Weather Events in the Niger Delta Part of Nigeria

Cited by 18 publications

References 27 publications

Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka

Comparison of Different Analyzing Techniques in Identifying Rainfall Trends for Colombo, Sri Lanka

Projected near-future changes in precipitation extremes over Anambra-Imo River Basin inferred from CMIP6 HighResMIP

Pollution investigation and risk assessment of polycyclic aromatic hydrocarbons in soil and water from selected dumpsite locations in rivers and Bayelsa State, Nigeria

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