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[1]LI Zhengqin,KE Haocheng,TIAN Jinhua,et al.Study on River Ecological Base Flow Based on Different Hydrology Methods[J].Research of Soil and Water Conservation,2023,30(04):177-183.[doi:10.13869/j.cnki.rswc.2023.04.011.]

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Study on River Ecological Base Flow Based on Different Hydrology Methods

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 177-183 Column: Public date: 2023-06-10

Title:: Study on River Ecological Base Flow Based on Different Hydrology Methods

Author(s):: LI Zhengqin¹, KE Haocheng¹, TIAN Jinhua², TIAN Menghan¹, LIANG Liang¹, LI Zhanbin³, LI Peng³; (1.Lanzhou University of Technology, Lanzhou 730050, China; 2.Gansu Institute of Soil and Water Conservation, Lanzhou 730020, China; 3.State Key Laboratory of Eco-Hydraulic in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China)

Keywords:: ecological base flow; improved annual distribution method; base flow ratio method; sudden change in hydrological sequence; Weihe River in Gansu Province

CLC:: P333

DOI:: 10.13869/j.cnki.rswc.2023.04.011.

Abstract:: [Objective] The aims of this study is to determine the recommended value of ecological base flow and reveal the applicability of different hydrographic methods for calculating the ecological base flow of the Weihe River in Gansu, and then to provide reference for the ecological base flow guarantee in the Weihe River in Gansu section. [Methods] Based on the monthly runoff data of Beidao hydrology station in recent 65 years, the ecological base flow values of the Weihe River in Gansu section were calculated and compared by using Tennant method, traditional annual spreading distribution method, improved annual spreading distribution method and base-flow ratio method. [Results] The ecological base flow of the control station in the Weihe River in Gansu calculated by Tennant method should be controlled between 1.12～12.38 m³/s. The ecological base flow calculated by traditional annual distribution method should be controlled within 0.72～4.13 m³/s. The ecological base flow calculated by improved annual distribution method should be controlled in the range of 1.48～8.19 m³/s. The ecological base flow calculated by base flow ratio method should be controlled between 1.76～12.37 m³/s. The average ecological base flow calculated by the three methods accounted for 16.89%, 6.59%, 12.69%, and 15.83% of the annual average flow, respectively. [Conclusion] The base flow proportion method and the improved annual distribution method have good effects on the allocation of base flow in non-flood season. The results of the base-flow ratio method can be used as the recommended values of the ecological base flow of the Weihe River in Gansu, and the study of ecological base flow guarantee should be strengthened in the future.

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Last Update: 2023-06-10