scholarly journals Influence of Land Use Activities on Spatial and Temporal Variation of Nutrient Deposition in Mwanza Region: Implication to the Atmospheric Loading to the Lake Victoria

2013 ◽  
Vol 03 (02) ◽  
pp. 224-234 ◽  
Author(s):  
Said Ali Hamad Vuai ◽  
John D. Ibembe ◽  
Nancy W. Mungai
Keyword(s):  
Land Use ◽  
Temporal Variation ◽  
Lake Victoria ◽  
Spatial And Temporal Variation ◽  
Nutrient Deposition ◽  
Atmospheric Loading

scholarly journals Spatial and Temporal Variation of Rainwater Chemistry in Ile-Ife and Its Environ, Osun State, Nigeria

2017 ◽  
Vol 10 (2) ◽  
pp. 203 ◽  
Author(s):  
Aderonke Adetutu Okoya ◽  
Bamikole Walter Osungbemiro ◽  
Temi E. Ologunorisa
Keyword(s):  
Land Use ◽  
Chemical Composition ◽  
Temporal Variation ◽  
Major Ions ◽  
Rain Water ◽  
Spatial And Temporal Variation ◽  
Rainwater Chemistry ◽  
Water Composition ◽  
Physico Chemical ◽  
The Impact

The study of the chemical composition of rain water was conducted in Ile – Ife and environs, an agrarian, commercial, residential and semi-industrialised center of Osun state Nigeria. This was with a view to assessing the impact of land use activities on rain water composition and the temporal variation of rainwater chemistry. Physico-chemical parameters such as Turbidity, pH, TDS, Conductivity, Oxygen parameters, Alkalinity, Acidity, Hardness and Major ions (Ca2+, Mg2+, K+, Na+, NO3-, SO4-, HCO3-) were determined, predominant ions were identified. Turbidity, pH, Conductivity, TDS, D.O B.O.D, Alkalinity, Acidity Hardness ranged between 2.90 - 42.84 NTU, 5.65 - 7.40, 6.71 – 122.33 µScm-1, 4.10 –73.27 mg/L, 3.60 – 10.60 mg/L, 0.13 – 7.20 mg/L, 0.33 – 22.0 mg/L, 2.00 – 15.00 mg/L, 0.04 – 1.23 CaCO3mg/l respectively. The dominant ions detected in the study were HCO3-, Mg2+, Na+ and Ca2+. Generally, the mean concentration of ions as expressed in milli-equivalent per Litre showed order of dominance as HCO3- > NO3- > SO42- for the anions and Mg2+ > Na+ > Ca2+ > K+ for cations. The study concluded that land use activities had influence on all the chemical composition of rain water in the study area but more on pH, alkalinity, acidity, bicarbonate. Except sulphate and Nitrate, all other parameters recorded high values in dry season.

Spatial and temporal variation in the distribution and density of pelagic fish species in Lake Victoria, East Africa

2014 ◽  
Vol 17 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Anthony Taabu-Munyaho ◽  
Chrisphine S. Nyamweya ◽  
Lewis Sitoki ◽  
Robert Kayanda ◽  
Inigo Everson ◽  
...  
Keyword(s):  
Temporal Variation ◽  
East Africa ◽  
Fish Species ◽  
Lake Victoria ◽  
Pelagic Fish ◽  
Spatial And Temporal Variation
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