Impact of Lake Beseka on the Water Quality of Awash River, Ethiopia

Yosef Abebe Yimer^1, and Li Jin²

¹Water Quality Expert, Basins Development Authority, Addis Ababa, Ethiopia, P.O.B -20474/1000 Addis Ababa

²Department of Geology, State University of New York College at Cortland, Cortland, USA, Office: Bowers Hall 1004

Cite this paper:
Yosef Abebe Yimer and Li Jin. Impact of Lake Beseka on the Water Quality of Awash River, Ethiopia. American Journal of Water Resources. 2020; 8(1):21-30. doi: 10.12691/ajwr-8-1-3

Abstract

Untreated discharge from industries, domestic wastes, flower farms, and irrigation runoff are among the major sources of pollution in Awash River. Increasing of unregulated lake water discharge is another indication of water degradation in the AR. The objectives of the study were to better understand the discharge of Lake Beseka (LB) and its impact downstream on the water quality of Awash River (AR). 480 samples were collected from 2008 to 2017 and analyzed for more than 20 parameters e.g.; TDS, EC, pH, alkalinity, chloride, bicarbonates, carbonates at four sampling stations. Results showed that the water quality of the AR downstream of the Lake has shown a decreasing trend from 2013 to 2017. The quality of the river water deteriorating due to the release of unregulated Lake water into the AR. The annual mixing ratios of the Lake water with the AR were 6.67%, 13.98%, 45.83%, 27.67%, and 18.73% from 2013 to 2017. Thus, it is essential to install and implement adequate and affordable technologies in order to regulate and quantify amount of flow into the AR from the Lake. If the Lake water continuously drains at its current rate, it would be difficult to control its water quality deteriorating effect and will cause environmental disasters in water and soil salinity problematic downstream of the lake human habitats and the Amibera Irrigation Farms.

Keywords:
mixing Lake Beseka quantified Awash River water quality degradation salinity

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References:

[1]	Iddo Kan and Mickey Rapaport-Rom (2012). Regional blending of fresh and saline irrigation water: Is it efficient? Water Resources Research, Vol. 48, W07517.
[2]	Sir W. Halcrow and Partners, (1978). The Study of Beseka Lake Levels. Ministry of Water Resources, Addis Ababa, Ethiopia.
[3]	WWDSE/MoWER (2011). Study and Design Lake Beseka Level Rise Project-II; Ministry of Energy and Water Resource, Awash Basin Authority, Addis Ababa, Ethiopia.
[4]	Megessa O., (2017). Analyzing the temporal water quality dynamics of Lake Basaka, Central Rift Valley of Ethiopia; Department of Civil Engineering Sciences, University of Johannesburg APK Campus 2006, South Africa. 52, 012057.
[5]	Ayenew, T., (2004). Environmental implications of changes in the levels of lakes in the Ethiopian rift since1970. Regional Environmental Change 4, 192-204.
[6]	Anna Goerner, Jolie, E., Gloaguen, R., (2009) Non-climatic growth of Lake Beseka. Main Ethiopian rift. Journal of Arid Environments (2008), 1-9.
[7]	Mulugeta D., Bernd D., and Jackson R., (2015). Characterization of water level variability of the main Ethiopian Rift Valley Lakes. MDPI, Journal of Hydrology vol.3,1
[8]	WWDSE, MoWR (2010). Lake Beseka Level Rise Project-II, Environmental and Social Impact Assessment Study Report; Ministry of Water Resources (MoWR), Addis Ababa, Ethiopia.
[9]	FAO, (1976) Water Quality For Irrigation Water; Irrigation and Drainage Paper No. 29, FAO, Rome.
[10]	G. Hussien, A. and Al. Zarah (2010). Guidelines for irrigation water quality and water management in the kingdom of Saudi Arabia Journal of Applied Science.
[11]	Miller, R., and Donahue, R., (1999). Soils in Our Environment, Seventh Edition. Prudence Hall, Englewood, Cliffs, NJ. p.323.
[12]	William Davison (2013). Mysterious Lake Threatens Ethiopian Sugar Ambitions. https://www.bloomberg.com/news/articles/2013-04- 23/mysterious-lake-threatens-ethiopian-sugar-ambitions.
[13]	Elleni Ayalew, (2009). Growing Lake with growing problems: integrated hydrogeological investigation on Lake Beseka, Ethiopia. PhD thesis submitted to university of ZEF (Center for Development Research). Bonn, Germany
[14]	Haile A. Shishaye (2015). Challenges in Lake Beseka. (Conference Paper).
[15]	Elias K., Hailu A., Brook A., & Tilahun H. (2016). Ethiopia. Effect of blended irrigation water quality on soil physicochemical properties and cotton yield in Middle Awash Basin Ethiopia, EIAR/WERER, Addis Ababa.
[16]	Tyagi, N.K. (2003). Managing Saline and alkaline water for higher production central soil salinity Research Institute, Haryana, India.
[17]	Eaton, F.M. (1950). Significance of carbonates in irrigation water; Soil Sci. 69, pp 123-133.
[18]	Yosef A. and Abraha G., (2017). The Current Pollution Status of Awash River Basin, Ethiopia Unpublished MSc Thesis Mekelle University, Mekelle, Ethiopia.
[19]	Chaterjee, C. and Raziuddin, M. (2002). Determination of Water Quality Index (WQI) of a degraded river in Asanol Industrial area, Raniganj, Burdwan, West Bengal. Nature, Environ. Poll. Technol., 1(2), 181-189.
[20]	Kebede, E., Mariam, Z., & Ahlgren, I., (1994). The Ethiopian Rift Valley lakes: chemical characteristics of a salinity-alkalinity series. Hydrobiologia 288, 1-12.
[21]	Talling J. and Talling I. (1965). The chemical composition of African lake waters Int. revue. Hydrobiolges. 50 pp 421-463.
[22]	Kelly J. Morgan., (1998). Understanding the potential with high bicarbonates in irrigation water. South West Florida Research and Education Center, Immokalee. Reprinted from California-Arizona farm press.
[23]	ASTU (2016). Water Quality Modeling of Awash River Basin (Unpublished final Report). Adama Science and Technology University (ASTU), Adama, Ethiopia.
[24]	https://aglifesciences.tamu.edu/baen/wp- content/uploads/sites/24/2017/01/B-1667-Irrigation-Water- Quality-Standards-and-Salinity-Management-Strategies.pdf (AGRILIFE Extension-Texas-2017).
[25]	Megersa O., Willibald L. & Josef F., (2009) Effect of Lake Basaka expansion on the sustainability of Matahara SE in the Awash river basin, Ethiopia, Addis Ababa.
[26]	Krista E. Pearson, & James W. Bauder (2003) Basics of Salinity and Sodicity Effects on Soil Physical Properties. Adapted by Krista E. Pearson from a paper by Nikos J. Warrence.
[27]	Singh, A.K., Mondal, G.C., Suresh Kumar, T.B., Singh, B.K. Tewary, A., (2008). Major ion chemistry, weathering processes and water quality assessment in upper catchment of Damodar River basin, India. Environmental Geology 54: 745-758.
[28]	Lesch S., Donald L.S. (2009). Technical Note: A short note on calculating the Adjusted SAR Index.
[29]	Nikos J. Warrence, Krista E. Pearson, and James W. Bauder (2003) Basics of Salinity and Sodicity Effects on Soil Physical Properties. Adapted by Krista E. Pearson from a paper by Nikos J. Warrence, Krista E. Pearson, & James W. Bauder
[30]	Ayers, R.S. and D.W. Westcot, (1976) Water Quality for Agriculture, FAO Irrigation and Drainage Paper No, 29 (Rev 1), Food and Agriculture Organization of the United Nations.
[31]	Ayers, R.S., Westcot, D.W., (1985). Water Quality for Agriculture; Food and Agriculture Organization of the United Nations: Rome, Italy.
[32]	WHO (2011) Guidelines for drinking-water quality. Vol.1, 4th.ed., world health organization, Geneva.
[33]	Rao, D.L.N., Singh, N.T., Gupta, R.K. and Tyagi, N.K. (eds) (1994) Salinity Management for Sustainable Agricultural. Central Soil Salinity Research Institute, Karnal, India.
[34]	Yoshito Yuyama (1999) The Impact of agriculture on water quality and methodology for its improvement in Japan. JICA Expert, Royal Irrigation Department Bangkok, Thailand. http://www.fao.org/3/a-bl035e.pdf.
[35]	Bryan G. Hopkins, Donald A. Horneck, Robert G. Stevens, Jason W. Ellsworth, Dan M. Sullivan. (2007), Managing Irrigation Water Quality, for crop production in the Pacific Northwest, A Pacific Northwest Extension publication PNW 597-E.
[36]	MoWR (1999) Study of Lake Beseka. Ministry of Water Resources, MoWR, Addis Ababa, Ethiopia, (Main Report, Vol.1).
[37]	César Almeida, Silvya Quintar, Patricia González and Miguel Mallea (2007) Assessment of irrigation water quality. A proposal of a quality profile. Environmental Monitoring and Assessment 142: 149-152.
[38]	U.S, EPA (2014) Draft Summary of Blending Practices and the Discharge of Pollutants for Different Blending Scenarios. Developed by Tetra Tech, Inc. Under U.S. EPA (Office of wastewater management water permits division), Contract No. EP-C-11-009 Work Assignment No. 3-05. h0/documents/sso_lit_review_draft.pdf http://cfpub.epa.gov/npdes/sso/peakflowsforum.cfm) https://www.tetrapak.com/processing/blending.