John Didacus Njoku

John Didacus Njoku
Federal University of Technology Owerri | FUTO

PhD

About

52
Publications
14,180
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123
Citations

Publications

Publications (52)
Article
Full-text available
The quality of fresh water sources as influenced by external and internal factors is a major consideration for water-use programs. Seasonal (rainy and dry) values and variations of pH, Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) and their interactions in Imo River quality were determined under standard analytical methods. Wate...
Article
Full-text available
The study investigated the effects of oil spillage on the surface water resources at Mmahu, in Ohaji/Egbema L.G.A., Imo State. It was suspected that oil exploratory and exploitation activities have degraded surface water resources in the area. The study determined the extent of damage to surface water by oil spillage. Water samples were collected f...
Article
Full-text available
It was discovered that it is difficult to achieve cooperation for air pollution control in developing countries like Nigeria whose main concern is to provide the basic needs as food, shelter and employment for her populace. Moreover, the control measures adopted have not been very effective and fully enforced (Suleiman, 2013). It is based on the ab...
Research
Full-text available
The quality of fresh water sources as influenced by external and internal factors is a major consideration for water-use programs. Seasonal (rainy and dry) values and variations of pH, Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) and their interactions in Imo River quality were determined under standard analytical methods. Wate...
Article
Full-text available
This study investigated the air quality parameters and microbial load of poultry, piggery and abattoir vicinities in selected LGAs of Imo State. Three facilities (Piggery farm, Poultry farm) and two abattoirs were selected and sampled for four weeks. Temperature and relative humidity was determined using HT9600 detector. Wind speed and wind directi...
Article
Full-text available
This study analyzed relationships between soil properties and food crop production in Ebonyi State of southeast Nigeria. Free survey was conducted after three zones (Agbaja, Akaeze and Ikwo) in the state were purposely selected for representation of the soil sampling. Two types of sampling were conducted; Auger sampling at 0-20 and 20-40 cm depths...
Article
Full-text available
The study was conducted in Imo State in Southeastern Nigeria where rain fed agriculture is widely practiced. People in the area are affected by the current global food security crisis due to their total dependence on rainfall for agricultural production. It assesses relationships existing between climate change and food crop production in the area....
Article
Full-text available
This study compared the contribution of various soil erodibility factors in the formation of gully erosion channels in the study area. Gully cross sectional area were measured in the field. Soil samples were collected at the top, middle and gully floor and analyzed for various soil physical/geotechnical parameters. Field measurements as well as the...
Article
Full-text available
This study applied Geographic Information System (GIS), to assess the spatial distribution of groundwater quality parameters and to identify places with the best groundwater quality within the study area. This study was based on spatial integrated analysis of physico-chemical parameters obtained from Anambra-Imo River Basin Authority Owerri Imo Sta...
Article
Full-text available
This study constitutes a critical measure of comprehension among the local residents of various communities on how they view the causes and impacts of soil erosion; this is in view to designing a sustainable control measure against erosion. On the basis of gully erosion density determined from satellite imagery, thirty communities were selected f...
Article
Full-text available
Due to demand for fish products which has doubled since the 1950s following rising population and declining wild catch from open water and lagoons, fish farming now offers an effective alternative to generating animal protein and income from dwindling land spaces. However, to embark on fish farming venture, a suitable site need to be identified to...
Article
Full-text available
This is a GIS-based time series study of annual soil loss value and soil erosion trends linked with precipitation and land use in Okigwe. The Revised Universal Soil Loss Equation (RUSLE) model was used to calculate annual soil loss. In applying the model, flow length was used instead of flow accumulation to estimate the slope length and steepness (...
Article
Full-text available
This is a GIS-based time series study of annual soil loss value and soil erosion trends linked with precipitation and land use in Okigwe. The Revised Universal Soil Loss Equation (RUSLE) model was used to calculate annual soil loss. In applying the model, flow length was used instead of flow accumulation to estimate the slope length and steepness (...
Article
Full-text available
In Owerri and environs of southeastern Nigeria, urban centers are faced with environmental challenges arising from infrastructural development, increase in paved surfaces. This study investigated the relationship between impervious surfaces and ambient temperature in Owerri Metropolis using remotely sensed data. Landsat 7 ETM+ of 1986, Landsat 5 TM...
Article
Full-text available
Soils of a mine site at Leru, Abia State, Nigeria were characterized and classified for proper usage .A transect survey technique was employed in which a traverse was cut to link soils affected by mining to the unaffected soils in the area. Soil profile pits were dug described and sampled using standard techniques. Routine laboratory analyses were...
Article
Full-text available
In Owerri and environs of southeastern Nigeria, urban centers are faced with environmental challenges arising from infrastructural development, increase in paved surfaces. This study investigated the relationship between impervious surfaces and ambient temperature in Owerri Metropolis using remotely sensed data. Landsat 7 ETM+ of 1986, Landsat 5 TM...
Conference Paper
Full-text available
The high incidence of seasonal rainfall and the nature of soils made parts of southeastern (SE) Nigeria vulnerable to degradation by mainly flood and erosion. This study is an attempt to uncover the traditional methods of flood water harvesting and conservation among the Mbaise peoples of SE. The ponds (Iyi-ala, meaning land river) were created to...
Article
Full-text available
This study applied Geographical Information System Technology in the spatial analysis of flood risks in Aba metropolis. Data on spot heights and elevation were collected with Global Positioning System and used to produce digital elevation model map in a 2-D format; the aspect map showed the natural direction of storm water flow; the slope map was u...
Article
Full-text available
The quality of fresh water sources as influenced by external and internal factors is a major consideration for water-use programs. Seasonal (rainy and dry) values and variations of pH, Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) and their interactions in Imo River quality were determined under standard analytical methods. Wate...
Conference Paper
Full-text available
Despite the actions of past Nigerian administrations to contain the problems of urbanization through the promulgation of major land development and urban management laws establishing special regulatory institutions, the cities are still besieged by many of those challenges. With the intent to examine the duties and responsibilities of the various t...
Article
Full-text available
The quality of fresh water sources as influenced by external and internal factors is a major consideration for water-use programs. Seasonal (rainy and dry) values and variations of pH, Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) and their interactions in Imo River quality were determined under standard analytical methods. Wate...
Article
Full-text available
This study investigated the physicochemical status of groundwaters of the oil-rich Ekakpamre community in Ughelli, Nigeria. Ten borehole water samples located about 1 km apart and soil samples around them were collected and analyzed by standard methods. Clay, sand and silt compositions in overlaying soils appeared to influence the DO (r=-0.999), TP...
Article
Full-text available
Artisanal refining typically involves primitive illegal stills in which crude oil is boiled and the resultant fumes are collected, cooled and condensed in tanks to be used locally for lighting, energy or transport. The distilleries are heated on open fires fed by crude oil that is tipped into pits in the ground. As part of the oil burns away, some...
Article
Full-text available
The United Nations General Assembly, at its Millennium meeting in 2000, established eight Millennium Development Goals (MDGs) with targets to be achieved by 2015, with the aim of speeding up poverty alleviation and socio-economic development. The MDGs were elaborated and endorsed by the intergovernmental community at the World Summit on Sustainable...
Article
Full-text available
This study investigated the physicochemical status of groundwaters of the oil-rich Ekakpamre community in Ughelli, Nigeria. Ten borehole water samples located about 1 km apart and soil samples around them were collected and analyzed by standard methods. Clay, sand and silt compositions in overlaying soils appeared to influence the DO (r=-0.999), TP...
Article
Full-text available
The United Nations General Assembly, at its Millennium meeting in 2000, established eight Millennium Development Goals (MDGs) with targets to be achieved by 2015, with the aim of speeding up poverty alleviation and socio-economic development. The MDGs were elaborated and endorsed by the intergovernmental community at the World Summit on Sustainable...
Article
Full-text available
The research evaluated soil fertility condition of River Otamiri watershed in southeastern Nigeria in relation to topographic heterogeneity using GIS technique. GPS was used to determine the geodetic coordinate of the sampling points and site elevation. Soil samples were collected and analyzed using standard soil analysis method to determine major...
Article
Full-text available
We investigated the effects of palm bunch refuse ash on soil properties and performance of amaranth (Amaranthus cruentus) in 2008, 2009 and 2010. Routine land preparations were made. Seedlings were raised and transplanted after 14 days. The experiment consisted of 5 treatments: 0t/ha, 0.5t/ha,1.0t/ha, 1.5t/ha and 2.0t/ha of palm bunch refuse ash, w...
Article
Land use and Land cover dynamics is a major feature of human presence and existence. In and around Owerri Metropolis, in Southeastern Nigeria, land conversion for infrastructural facilities is dominant. This study assesses the conversion rate and classes of land for infrastructure. Landsat TM 86 and ETM+ 2000 were used to detect and map the infrast...
Article
Land use and land cover dynamics has been commonplace around Owerri and environs. Landsat TM 86 and ETM+ 2000 were used to detect and map these changes. The imageries were mapped at the scales of 1:250,000 and 1:150,000 using ILWIS Academic 3.0 GIS software. The result showed significant shift in the aggregate land use and land cover class due to n...
Article
Full-text available
Corrected and uncorrected SPOT XS imageries are used to achieve comparative assessment of built-up areas land use and land cover classes in Northwestern Nigeria. The built-up environment showed on both imageries. The PAVM was used to determine the ability of the data sets to produce similar results over the area. Results indicate a low PAVM value f...

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Project (1)
Project
To ascertain the level of pollution at the different locations within the Niger delta region and to compare if this pollution occurs more in the industrial areas while also checking out to see if Wetlands soil are more or less vulnerable to pollution than terrestrial areas.