Minimum Instream Environmental Flow in Shatt Al-Hillah River
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Abstract
To maintain river flows necessary to meet social and ecological objectives, instream environmental flows are frequently used as a strategy. The capability of three alternative historical flow approaches to protect against low flows is shown in this study using gage stations in the Shatt Al-Hillah River in Iraq. The extension of the Shatt al-Hillah River is the focus of this research discussion on environmental flow assessment. The available data on discharge in this research were adopted for ten years from 2012-2021. Different flow methods were adopted to establish a minimum environmental flow in the Shatt Al-Hillah River. Three hydrological-based approaches: Tennant, modified Tennant, and low-flow metrics like 7Q10, were used to compare the results of the methods with the provision of a minimal environmental flow. The Tennant method relies on 30 % of the annual discharge rate as the minimum environmental instream flow. The modified Tennant method is based on 30% of the monthly average discharge rate as a minimum environmental instream flow. The 7Q10 method is based on the lowest daily discharge rate in 7 consecutive days for ten years. The results showed that the minimum instream environmental flow given by the Tennant method is 42.26 m3/s while the lowest value of the minimum instream environmental flow obtained from modified Tennant was 37.2 m3/s in January, and the largest value was 47.22 m3/s in August. The one obtained by the 7Q10 method was 50 m3/s in this research.
Article received: 12/11/2022
Article accepted: 03/12/2022
Article published: 01/04/2023
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Abbas, S. H., Khudair, B. H., and Jaafar, M. S., 2019. River water salinity impact on drinking water treatment plant performance using artificial neural network. Journal of Engineering, 25, pp. 149-159. doi:10.31026/j.eng.2019.08.10
Al-Zaidy, H. S. A., and Al-Thamiry, H. A. K., 2020. Prediction Capacity of Euphrates River at Assamawa City. Journal of Engineering, 26, pp. 111-122. doi:10.31026/j.eng.2020.04.08
Alsaadi, T. S., and Al-Thamiry, H. A. K., 2022. Evaluation and Development of the (Hilla–Daghara) Rivers System. Journal of Engineering, 28 , pp. 46-62. doi:10.31026/j.eng.2022.02.04
Alzubaidi, A., and Pagel, H., 1974. Chemical characteristics of some Iraqi soils. Tropische Lardwirtschaft and Veterinarmedizin, 12, pp.229-320
Annear, T. C., and Conder, A. L., 1983. Evaluation of instream flow methods for use in Wyoming. Wyoming Game and Fish Department, Cheyenne, Wyo.
Assessment, M. E., 2005. Living beyond our means: natural assets and human well-being: statement from the board, Millennium Ecosystem Assessment.
Caissie, D., and El-Jabi, N., 1995a. Comparison and regionalization of hydrologically based instream flow techniques in Atlantic Canada. Canadian Journal of Civil Engineering, 22, pp,35-246. doi:10.1139/l95-033
Caissie, D., and El-Jabi, N. Comparison of hydrologically based instream flow techniques in New Brunswick. Managing the Water Environment, Proceedings of the 48th CWRA Annual Conference, Fredericton, NB, 1995b, pp. 20-23.
Chiang, S. L., and Johnson, F. W., 1976. Low flow criteria for diversions and impoundments. Journal of the Water Resources Planning and Management Division, 102, pp. 227-238.
doi:10.1061/JWRDDC.0000019
Fraser, J., 1978. Suggestions for developing flow recommendations for in-stream uses of New Zealand streams (a report to the National Water and Soil Organisation). Water and Soil Miscellaneous Publication-National Water and Soil Conservation Organisation (New Zealand).
Jowett, I., 1997. Instream flow methods: a comparison of approaches. Regulated Rivers: Research & Management: An International Journal Devoted to River Research and Management, 13, pp. 115-127. doi:10.1002/(SICI)1099-1646(199703)13:2<115::AID-RRR440>3.0.CO;2-6
Manea, M. H., Al-Tawash, B. S., and Al-Saady, Y. I., 2019. Hydrochemical characteristics and evaluation of surface water of Shatt Al-Hilla, Babil Governorate, Central Iraq. Iraqi Journal of Science, pp. 583-600. doi:10.24996/ijs.2019.60.3.17
Mosawi, M. A., and Al Thamiry, H., 2022. Evaluation of Elaj Irrigation Project in Babil Governorate. Journal of Engineering, 28, pp. 21-33. doi:10.31026/j.eng.2022.08.02
Orth, D. J., 1981. Evaluation of the" Montana method" for recommending instream flows in Oklahoma streams. Proceedings of the Oklahoma Academy of Science, pp. 62-66.
Praskievicz, S., Luo, C., Bearden, B., and Ernest, A., 2018. Evaluation of low-flow metrics as environmental instream flow standards during long-term average and 2016 drought conditions: Tombigbee River Basin, Alabama and Mississippi, USA. Water Policy, 20, pp. 1240-1255.
doi:10.2166/wp.2018.023
Reiser, D. W., Wesche, T. A., and Estes, C., 1989. Status of instream flow legislation and practices in North America. Fisheries, 14, pp. 22-29.
doi:10.1577/1548-8446(1989)014<0022:SOIFLA>2.0.CO;2
Ubertini, L., Manciola, P., and Casadei, S., 1996. Evaluation of the minimum instream flow of the Tiber River Basin. Environmental monitoring and assessment, 41, pp. 125-136.
Wesche, T. A., and Rechard, P. A., 1980. A summary of instream flow methods for fisheries and related research needs. Water Resources Research Institute Eisenhower Consortium Bulletin, 9, University of Wyoming, Laramie.