Influence of Surrounding Land Use on the Physicochemical Parameters of Agulu Lake, Anambra State, Nigeria

Okoye, Nelson Mbanefo; Orakwe, L. C.

doi:10.9734/acri/2018/39397

Cited by 6 publications

(4 citation statements)

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“…Greater intake of nitrate causes methemoglonaemia in youngster which might also create mental retardation if the child survives. Moreover, nitrate in the bod may reduce to nitrite which is NO 2 − which oxidizes with amines to create carcinogenic nitrosamines (Okoye and Orakwe, 2018). Greater intake of cadmium causes flu-like or chronic sicknesses such as muscle pain, chills, lung, and fever in youngster and elderly.…”

Section: Hazard Quotient (Hq) and Hazard Index (Hi)mentioning

confidence: 99%

“…Greater intake of cadmium causes flu-like or chronic sicknesses such as muscle pain, chills, lung, and fever in youngster and elderly. Moreover, cadmium high exposure due to human deeds associated with industrialization also generated bone or itai-itai sickness that characterized by osteomalaecia that is related with renal tubular dysfunction, which was first discovered in Japan in 1960s (Okoye and Orakwe, 2018).…”

Section: Hazard Quotient (Hq) and Hazard Index (Hi)mentioning

confidence: 99%

“…Urbanization and industrialization influences environmental consequences that later cause's negative effect on the groundwater as a source of supply over an extended period. At hand aremany lands open for raw solid unwanted (waste) disposal (Agbazue et al, 2015;Okoye and Orakwe, 2018). The ever-growing populace and accumulation of wastes pose serious environmental, socio-economic problems in the developed and developing nations.…”

Section: Introductionmentioning

confidence: 99%

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2023

IJWPDS

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Anthropogenic and industrial activities triggering an alteration on the natural cadmium and nitrogen cycle are deliberated on as one among the most vital environmental concerns. Water quality index (WQI) and skewness, nitrate was 8.37 ± 1.014 in dry season and 3087.87 ± 1.150 for wet season, but cadmium was 0 ± 1.559 in wet season and zero all through the sunny period. Equating results with World Health Organization (WHO) permissible limits, it discovered that nitrate was low throughout both seasons whereas cadmium was 90% above permissible during rainy season, but 100% within limit throughout arid season. The water-physiques in all sites at Ikpoba River in both seasons revealed low disparities (< 20%) with positive linear relationship (R 0.922 ≥ 0.211) for nitrate and (R 0 ≤ 089) for cadmium in dry and wet seasons respectively. What's more, site 1 in the wet season, and all sites in dry season, exhibited no significant dissimilarities (p >0.05) between them, but others indicated significant dissimilarity (p <0.05) for cadmium and nitrate concentrations. In respect to seasonality, all water-physiques scrutinized revealed significant dissimilarities (p <0.05) for both seasons (nitrate and phosphate) concentration. The cadmium-nitrate ratio was very high particularly in the humid season because of the high input of nitrate. The nutrient contagion index displayed slightly to significantly contagion, whereas the water physiques will pose very high non-carcinogenic health risks and threats to users through the oral pathway.

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Section: Hazard Quotient (Hq) and Hazard Index (Hi)mentioning

confidence: 99%

Section: Hazard Quotient (Hq) and Hazard Index (Hi)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2023

IJWPDS

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“…Prominent amongst them is the Agulu Lake located towards the Eastern edge of the basin. The lakes may have originated from erosion and depositional processes along the course of the Idemili River and are known to display periodic fluctuation in size (Okoye and Orakwe 2018).…”

Section: Object (Cover Class) Identificationmentioning

confidence: 99%

A GIS-Based Methodology for Extracting Historical Land Cover Data from Topographical Maps: Illustration with the Nigerian Topographical Map Series

Maduekwe¹

2021

KN J. Cartogr. Geogr. Inf.

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The availability of historical land cover data is a major challenge to long term land change analysis. This is more so in developing countries like Nigeria with weak land information systems and poor inventories of long term land cover data. This situation is to some extent ameliorated by the existence of topographic maps which represent encryptions of historical snapshots of land condition based on primary sources like aerial and land surveys. Topographic maps are however not easily amenable to analysis for land cover data extraction, given their inherent characteristics. This paper presents a GIS-based digitization, symbols analysis, pattern recognition, and polygonization methodology for the extraction of land cover information from topographic maps. The methodology is demonstrated with sheets in the Nigerian topographic map series covering the Idemili River basin. Results show that indigenous settlement types, derived Savanna, and residual forests occupied 27%, 35% and 24% of the basin area, respectively, during the period. An internal data validation approach showed a significant correlation (p = 0.000; r = 0.975) between base topographical map and extracted cover data. There is a need to apply the methodology to other topographical sheets in country's inventory to build up a national digital database of historical land cover. KeywordsHistorical land cover • Topographic maps • GIS • Nigeria • Data validation Eine GIS-basierte Methode zum Extrahieren historischer Landbedeckungsdaten aus topographischen Karten: Eine Darstellung mit der nigerianischen Reihe topographischer Karten Zusammenfassung Die Verfügbarkeit historischer Landbedeckungsdaten ist eine große Herausforderung für die langfristige Analyse von Landveränderungen. Dies gilt insbesondere für Entwicklungsländer wie Nigeria mit schwachen Landinformationssystemen und schlechten Beständen an langfristigen Landbedeckungsdaten. Diese Situation wird in gewissem Maße durch die Existenz topographischer Karten verbessert, die historische Momentaufnahmen des Landzustands repräsentieren, die auf Primärquellen wie Luft-und Landvermessungen basieren. Topographische Karten sind jedoch aufgrund ihrer inhärenten Eigenschaften für eine Analyse zur Extraktion von Landbedeckungsdaten nicht leicht zugänglich. In diesem Artikel wird eine GIS-basierte Digitalisierungs-, Signaturenanalyse-, Mustererkennungs-und Polygonisierungsmethode zur Extraktion von Landbedeckungsinformationen aus topografischen Karten vorgestellt. Die Methodik wird anhand von Blättern der nigerianischen topographischen Kartenserie demonstriert, die das Einzugsgebiet des Flusses Idemili abdecken. Die Ergebnisse zeigen, dass einheimische Siedlungsstrukturen, abgeleitete Savannen und Restwälder im Berichtszeitraum 27%, 35% bzw. 24% der Beckenfläche einnahmen. Ein interner Datenvalidierungsansatz verweist auf eine signifikante Korrelation

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Pollution and health risks assessment of nitrate and phosphate concentrations in water bodies in South Eastern, Nigeria

Isiuku

Enyoh

2020

Environmental Advances

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Influence of Surrounding Land Use on the Physicochemical Parameters of Agulu Lake, Anambra State, Nigeria

Cited by 6 publications

References 0 publications

Untitled

Untitled

A GIS-Based Methodology for Extracting Historical Land Cover Data from Topographical Maps: Illustration with the Nigerian Topographical Map Series

Pollution and health risks assessment of nitrate and phosphate concentrations in water bodies in South Eastern, Nigeria

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