Monitoring and Evaluating the Sedimentation Process in Mosul Dam Reservoir Using Trap Efficiency Approaches

Issa E. Issa^1,2*, Nadhir Al-Ansari^1*, Sven Knutsson^1*, Govand Sherwany^3*

¹Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå, Sweden.
²University of Mosul, Mosul, Iraq.
³Ministry of Higher Education and Scientific Research—KRG, Erbil, Iraq.

DOI: 10.4236/eng.2015.74015                

Abstract

Reservoirs are usually exposed to sediment accumulation problems that will lead to reduction in their storage capacity. This problem directly affects the performance of the dams and causes shortage of their useful life. The simplest technique to estimate sediment deposition rate is using sediment rating curve with sediment trapping efficiency (TE) of the reservoir. Many empirical and semi-empirical approaches have been suggested for to determine this term depending on the annual inflow rate, reservoir characteristics and features of the catchments area. In this study six different empirical methods depending on the residence time principle (water retention time) were used. These approaches were reviewed and applied to determine TE of Mosul dam reservoir (MDR) for period 1986 to 2011. The monthly operating data for inflow, outflow and water elevations for MDR were used to determine monthly TE and long-term TE for whole period of MDR using the mentioned methods. Furthermore, the monthly inflow rate for River Tigris upstream MDR, its sediment rating curve and sediment feeding from valleys around MDR were used to estimate the amount sediment coming to the reservoir. The results provided by these methods for TE with sediment coming to MDR were used to compute the amount of sediment deposited in MDR on monthly bases during this period. The results obtained were evaluated using observed bathymetric survey data that had been collected in 2011 after 25 years of the operation of the dam. The results showed all the mentioned methods gave convergent results and they were very close to bathymetric survey results for estimating the volume of sediment deposited especially that proposed by Ward which gave 0.368% percentage error. Furthermore, the result computed using monthly TE gave good agreement if compared with that long-term TE where the percentage error was ranging between –3.229% to 1.674% for monthly adopted data and –4.862% to –2.477% for whole period data. It is believed that this work will help others to use this procedure on other reservoirs.

Keywords

Losing Storage Capacity, Mosul Dam, Reservoir Sedimentation, Sediment Trap Efficiency

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Morris, G.L. and Fan, J. (1998) Reservoir Sedimentation Handbook, Design and Management of Dams, Reservoirs, and Watersheds for Sustainable Use. McGraw-Hill Book Co., New York, 805 p.
[2]	Jain, S.K. and Singh, V.P. (2003) Water Resources Systems Planning and Management. Elsevier Science B.V.
[3]	Garde, R.J. (2006) River Morphology. New Age International Ltd., New Delhi, 502 p.
[4]	Yang, X.Q. (2003) Manual on Sediment Management and Measurement. World Meteorological Organization, Operational Hydrology Report No. 47, WMO-No. 948, Secretariat of the World Meteorological Organization, Geneva.
[5]	Sumi, T., Okano, M. and Takata, Y. (2004) Reservoir Sedimentation Management with Bypass Tunnels in Japan. Proceedings of 9th International Symposium on River Sedimentation, Yichang, 1036-1043.
[6]	Basson, G. (2008) Reservoir Sedimentation—An Overview of Global Sedimentation Rates and Predicted Sediment Deposition. Oral Contribution to the International CHR Workshop—Expert Consultation: Erosion, Transport and Deposition of Sediments, Berne, 28-30 April 2008, 74-79.
[7]	Annandale, G.W. (2013) Quenching the Thirst: Sustainable Water Supply and Climate Change. Create Space Independent Publishing Platform, North Charleston, 250 p.
[8]	Garde, R.J. and Raju, K.G. (1985) Mechanics of Sediment Transportation and Alluvial Stream Problems. 2nd Edition, Wiley Eastern Limited.
[9]	Annandale, G.W. (1987) Reservoir Sedimentation. Elsevier Science Publisher B.V.
[10]	Smith, S.E. (1990) A Revised Estimate of the Life Span for Lake Nasser. Environmental Geology and Water Sciences, 15, 123-129. http://dx.doi.org/10.1007/BF01705100
[11]	Maneux, E., Probst, J.L., Veyssy, E. and Etcheber, H. (2001) Assessment of Dam Trapping Efficiency from Water Residence Time: Application to Fluvial Sediment Transport in the Adour, Dordogne, and Garonne River Basins (France). Water Resources Research, 37, 801-811. http://dx.doi.org/10.1029/2000WR900195
[12]	Brune, G.M. (1953) Trap Efficiency of Reservoirs. Transactions, American Geophysical Union, 34, 407-418. http://dx.doi.org/10.1029/TR034i003p00407
[13]	Dendy, F.E. (1974) Sediment Trap Efficiency of Small Reservoirs. Transactions of the ASAE, 17, 898-988. http://dx.doi.org/10.13031/2013.36994
[14]	Gill, M.A. (1979) Sedimentation and Useful Life of Reservoirs. Journal of Hydrology, 44, 89-95. http://dx.doi.org/10.1016/0022-1694(79)90148-3
[15]	Ward, P.R.B. (1980) Sediment Transport and a Reservoir Siltation Formula for Zimbawe-Rhodesia. Die Siviele Ingénier in Suid-Afrika, 9-15 (Januarie).
[16]	Heinemann, H.G. (1981) A New Sediment Trap Efficiency Curve for Small Reservoirs. Water Resources Bulletin, 175, 825-830. http://dx.doi.org/10.1111/j.1752-1688.1981.tb01304.x
[17]	Jothiprakash, V. and Garg, V. (2008) Re-Took to Conventional Techniques for Trapping Efficiency Estimation of a Reservoir. International Journal of Sediment Research, 23, 76-84. http://dx.doi.org/10.1016/S1001-6279(08)60007-4
[18]	Issa, I.E., Al-Ansari, N. and Knutsson, S. (2013) Sedimentation and New Operational Curve for Mosul Dam, Iraq. Hydrological Sciences Journal, 58, 1456-1466. http://dx.doi.org/10.1080/02626667.2013.789138
[19]	Al-Ansari, N., Issa, I.E., Sherwani, G. and Knutsson, S. (2013) Sedimentation in the Mosul Reservoir of Northern Iraq. Journal of Environmental Hydrology, 21, 1-10.
[20]	Droogers, P., Immerzeel, W.W., Terink, W., Hoogeveen, J., Bierkens, M.F.P., van Beek, L.P.H. and Debele, B. (2012) Water Resources Trends in Middle East and North Africa towards 2050. Hydrology and Earth System Sciences, 16, 3101-3114. http://dx.doi.org/10.5194/hess-16-3101-2012
[21]	Issa, I.E., Al-Ansari, N.A., Sherwany, G. and Knutsson, S. (2014) Expected Future of Water Resources within Tigris-Euphrates Rivers Basin, Iraq. Journal of Water Resource and Protection, 6, 421-432. http://dx.doi.org/10.4236/jwarp.2014.65042
[22]	Ansari, N.A., Ali, A. and Knutsson, S. (2014) Present Conditions and Future Challenges of Water Resources Problems in Iraq. Journal of Water Resource and Protection, 6, 1066-1098. http://dx.doi.org/10.4236/jwarp.2014.612102
[23]	Al-Ansari, N.A., Ali, A.A. and Knutsson, S. (2015) Iraq Water Resources Planning: Perspectives and Prognoses. Proceedings of the ICCCE 2015: XIII International Conference on Civil and Construction Engineering, Jeddah, 26-27 January, 2097-2108.
[24]	Yang, C.T. (1996) Sediment Transport: Theory and Practice. McGraw-Hill, New York.
[25]	Verstraeten, G. and Poesen, J. (2001) Modelling the Long-Term Sediment Trap Efficiency of Small Ponds. Hydrological Processes, 15, 2797-2819. http://dx.doi.org/10.1002/hyp.269
[26]	Garg, V. and Jothiprakash, V. (2008) Trap Efficiency Estimation of a Large Reservoir. ISH Journal of Hydraulic Engineering, 14, 88-101. http://dx.doi.org/10.1080/09715010.2008.10514907
[27]	Espinosa-Villegas, C.O. and Schnoor, J.L. (2009) Comparison of Long-Term Observed Sediment Trap Efficiency with Empirical Equations for Coralville Reservoir, Iowa. Journal of Environmental Engineering, 135, 518-525. http://dx.doi.org/10.1061/(ASCE)0733-9372(2009)135:7(518)
[28]	Lewis, S.E., Bainbridge, Z.T., Kuhnert, P.M., Sherman, B.S., Henderson, B., Dougall, C., Cooper, M. and Brodie, J.E. (2013) Calculating Sediment Trapping Efficiencies for Reservoirs in Tropical Settings: A Case Study from the Burdekin Falls Dam, NE Australia. Water Resources Research, 49, 1017-1029. http://dx.doi.org/10.1002/wrcr.20117
[29]	Brown, C.B. (1944) Discussion of Sedimentation in Reservoirs. Proceedings of the American Society of Civil Engineers, 69, 1493-1500.
[30]	Churchill, M.A. (1947) Discussion of “Analysis and Use of Reservoir Sedimentation Data”. Proceedings of the Federal Inter-Agency Sedimentation Conference, Denver, 6-8 May 1947, 139-140.
[31]	USACE (1989) Engineering and Design: Sedimentation Investigations of Rivers and Reservoirs. Engineering Manual 1110-2-4000, Washington DC.
[32]	Iraqi Ministry of Water Resources (2012) Water Resources, Mosul Dam. http://www.mowr.gov.iq/cwaterresourceview.php?id=54
[33]	Ezz-Aldeen, M., Al-Ansari, N.A. and Knutsson, S. (2012) Sediment Delivery from Right Bank Valleys to Mosul Reservoir, Iraq. Journal of Ecology and Environmental Sciences, 3, 50-53.
[34]	Al-Ansari, N.A. (2013) Management of Water Resources in Iraq: Perspectives and Prognoses. Journal of Engineering, 5, 667-684. http://dx.doi.org/10.4236/eng.2013.58080
[35]	Swiss Consultants (1979) Mosul Dam Project-Planning Report, State Organization of Dams: Republic of Iraq. Ministry of Irrigation, Volume 1, 34 p.
[36]	Saleh, D.K. (2010) Stream Gage Descriptions and Stream Flow Statistics for Sites in the Tigris River and Euphrates River Basins, Iraq. US Geological Survey, Data Series 540, 154 p. http://pubs.usgs.gov/ds/540/pdf/ds540.pdf
[37]	Al-Ansari, N.A. and Knutsson, S. (2011) Toward Prudent Management of Water Resources in Iraq. Journal of Advance Science and Engineering Research, 1, 53-67.
[38]	Harza Engineering Company and Binnie and Partners (1964) Hydrological Survey of Iraq: Appendix A, Hydrologic Network and Data. Vol. II, Final Report, The Government of Iraq, Ministry of Agriculture, Baghdad, 486 p.
[39]	Najib, Y.E. (1980) Characteristics of Tigris River at Mosul. Master’s Thesis, College of Engineering, University of Mosul, Mosul, 95 p.
[40]	Ezz-Aldeen, M., Al-Ansari, N.A. and Knutsson, S. (2013) Application of Swat Model to Estimate the Sediment Load from the Left Bank of Mosul Dam. Journal of Advance Science and Engineering Research, 3, 47-61.
[41]	ECB, Engineering Consulting Bureau (2010) Sedimentation Study at the Intake of North Al-Jazeera Irrigation Project. Final Report, Mosul University, College of Engineering, Contract No. 20, 112 p.