scholarly journals Assessment of downstream impact of Bahir Dar tannery effluent on the head of Blue Nile River using macroinvertebrates as bioindicators

2014 ◽  
Vol 6 (4) ◽  
pp. 342-350 ◽  
Author(s):  
Wosnie Assefa ◽  
Wondie Ayalew
Keyword(s):  
Nile River ◽  
Tannery Effluent ◽  
Bahir Dar ◽  
Blue Nile

scholarly journals Physico-chemical and biological evaluation of Blue Nile River at Lake Tana, Ethiopia, in relation to discharge of tannery effluent

2020 ◽  
Vol 13 (3) ◽  
pp. 185-195
Author(s):  
Mekdes Hone ◽  
Getachew Beneberu
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Samples ◽  
Biological Evaluation ◽  
Nile River ◽  
Tannery Effluent ◽  
Bahir Dar ◽  
Chironomid Larvae ◽  
Blue Nile ◽  
Low Dissolved Oxygen

Pollution of aquatic ecosystems with waste-water coming from tanneries is a serious challenge worldwide. The purpose of this study was to assess the water quality of Blue Nile River at a tannery in Bahir Dar, Ethiopia, using physicochemical and biological attributes. Four sampling sites were selected along the river based on the degree of degradation and major land-use types. Phyisco-chemical data, water samples, and chironomid larvae were collected monthly from March-May, 2016. Two liters of water were collected from each site and stored in the icebox and transported to Bahir Dar University. Water samples were analyzed for nutrients following standard procedures.  Chironomid larvae were collected using a D- Frame net of 500 µm mesh size. One-way ANOVA was used to compare variations in all measured parameters among the sampling sites. Low dissolved oxygen (2.8 mg/l) was recorded at the site where the tannery meets the river. Moreover, the concentration of soluble reactive phosphorus, SRP (25.5±14.3 μg/l) and conductivity (1907.3±39.5 µS/cm) were low in the most upstream site of the river. A total of six Chironomid genera belonging to the subfamilies Chironominae and Tanypodinae were identified.  The genus Chironomus dominated the impacted sites that had low dissolved oxygen levels. The other five genera were not found in those impacted sites. The result of this study indicated that the tannery effluent had impact on chironomid distribution as well as on river water quality.

scholarly journals Effect of Bahir Dar municipal effluents on water quality of the head of Blue Nile River

2016 ◽  
Vol 9 (2) ◽  
pp. 197
Author(s):  
Abrehet Kahsay Mehari ◽  
Shewit Gebremedhin ◽  
Belayneh Ayele
Keyword(s):  
Water Quality ◽  
Nile River ◽  
Bahir Dar ◽  
Blue Nile

scholarly journals Effects of Bahir Dar Textile Factory Effluents on the Water Quality of the Head Waters of Blue Nile River, Ethiopia

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Abrehet Kahsay Mehari ◽  
Shewit Gebremedhin ◽  
Belayneh Ayele
Keyword(s):  
Water Quality ◽  
Total Alkalinity ◽  
Biotic Index ◽  
Nile River ◽  
Bahir Dar ◽  
Upstream Site ◽  
Blue Nile ◽  
Family Level ◽  
The Mean ◽  
Textile Factory

The study was conducted in 2013/14 with the objective of determining the effects of Bahir Dar textile factory effluents on the head of Blue Nile River water quality. Dissolve oxygen was higher at the upstream site of the river, whereas BOD5, TDS, and total alkalinity values were higher at wastewater outlet of the factory site. The mean values of dissolved oxygen, BOD5, and total alkalinity were above maximum permissible limits set by WHO for drinking water at head of Blue Nile River. The mean value of BOD5 was above permissible limit of IFC for textile effluents to be discharged to surface water. A total of 836 aquatic macroinvertebrate individuals belonging to 21 families were collected. The Shannon-Wiener Diversity Index, the Hilsenhoff family-level biotic index, family richness, and percent dipterans were calculated. Hilsenhoff family-level biotic index and percent dipterans metrics differed significantly among sampling sites(P<0.05). Hilsenhoff family-level biotic index was higher at the most downstream site but percent dipterans were higher at site of discharge of effluent to the head of Blue Nile River. Therefore, there is indication that effluent demands frequent control and proper treatment before being discharged to the environment.

Sediment balances in the Blue Nile River Basin

2014 ◽  
Vol 29 (3) ◽  
pp. 316-328 ◽  
Author(s):  
Yasir S.A. ALI ◽  
Alessandra CROSATO ◽  
Yasir A. MOHAMED ◽  
Seifeldin H. ABDALLA ◽  
Nigel G. WRIGHT
Keyword(s):  
River Basin ◽  
Nile River ◽  
Blue Nile ◽  
Nile River Basin ◽  
Blue Nile River Basin

Recession flow analysis of the Blue Nile River

2003 ◽  
Vol 17 (14) ◽  
pp. 2825-2835 ◽  
Author(s):  
Anil Mishra ◽  
Takeshi Hata ◽  
A. W. Abdelhadi ◽  
Akio Tada ◽  
Haruya Tanakamaru
Keyword(s):  
Flow Analysis ◽  
Nile River ◽  
Blue Nile
Sign in / Sign up

Export Citation Format

Share Document