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A New Modified Tennant Method with Spatial-Temporal Variability

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  • Changwen Li
  • Ling Kang

Abstract

Tennant method gets more widely applied worldwide via diverse modified forms, yet the spatial-temporal variability of ecological flow (EF) criteria has frequently been questioned, because the EF criteria are based on constant percentages of average periodic flow. To solve this problem, a modified Tennant method with EF criteria changing with flow regime is proposed in this research. The improved approach consists of four steps: (1) monthly and year-to-year flow variability considered, natural daily flow series are grouped into 12 monthly categories, and every category is subdivided into wet, normal and dry year groups; (2) taken the influence of extreme inter-annual flow events and uneven intra-annual distribution on average periodic flow into account, the median daily flow for every month and water year is taken as the ceiling of optimum EF; (3) spatial flow variability considered, the daily average streamflow with 90 % exceeding probability in monthly flow duration curves is taken as the lower limit of minimum EF; (4) the EF criteria from minimum to optimum are designed by using the idea of arithmetic progression from Tennant method, and the classification number is appropriately readjusted. Finally, to verify the rationality of the improved method, the EFs of a large river (Hanjiang River), a middle river (Meijiang River) and a small river (Panlonghe River) with different flow regimes are assessed and compared with common hydrological methods. The results show that the proposed approach is rational and has excellent monthly and inter-annual rich-poor variability and transferability in different riverine ecosystems. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • Changwen Li & Ling Kang, 2014. "A New Modified Tennant Method with Spatial-Temporal Variability," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 28(14), pages 4911-4926, November.
    • Handle: RePEc:spr:waterr:v:28:y:2014:i:14:p:4911-4926
    DOI: 10.1007/s11269-014-0746-4
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    References listed on IDEAS

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    1. K. Meijer & W. Krogt & E. Beek, 2012. "A New Approach to Incorporating Environmental Flow Requirements in Water Allocation Modeling," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(5), pages 1271-1286, March.
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    1. Aihong Fu & Yi Wang & Zhaoxia Ye, 2020. "Quantitative Determination of Some Parameters in the Tennant Method and Its Application to Sustainability: A Case Study of the Yarkand River, Xinjiang, China," Sustainability, MDPI, vol. 12(9), pages 1-12, May.
    2. Wentong Hu & Wenquan Gu & Donghao Miao & Dongguo Shao, 2022. "Research on the Ecological Flow and Water Replenishment Thresholds for Diversion Rivers Based on the MC-LOR Algorithm," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(14), pages 5353-5369, November.
    3. Xiaokuan Ni & Zengchuan Dong & Wei Xie & Shujun Wu & Mufeng Chen & Hongyi Yao & Wenhao Jia, 2022. "A Practical Approach for Environmental Flow Calculation to Support Ecosystem Management in Wujiang River, China," IJERPH, MDPI, vol. 19(18), pages 1-18, September.
    4. Pu Zhang & Yinglan A & Jianhua Wang & Huan Liu & Qin Yang & Zefan Yang & Qinghui Zeng & Peng Hu, 2023. "Analysis of Identification and Driving Factors of Ecological Base Flow Noncompliance in Major Rivers of China," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(1), pages 269-287, January.
    5. Lijun Jiao & Ruimin Liu & Linfang Wang & Lin Li & Leiping Cao, 2021. "Evaluating Spatiotemporal Variations in the Impact of Inter-basin Water Transfer Projects in Water-receiving Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(15), pages 5409-5429, December.
    6. Yiming Wei & Zengchuan Dong, 2021. "Application of a Novel Jaya Algorithm Based on Chaotic Sequence and Opposition-based Learning in the Multi-objective Optimal Operation of Cascade Hydropower Stations System," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(5), pages 1397-1413, March.

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