Ecological Environmental Flow Estimation for Rivers with Complicated Hydraulic Conditions

Xiaolong Liu, Hanlin Song, Yufeng Ren,Meixiu Yu, Yixuan Liu, Dewei Wang, Fei Xia, Chunsheng Tang, Li Tian,Wuxin Dong, Jiayi He, Ting Fu

Water Science and Technology（2023）SCI 4区

Nanjing Polytech Inst | Hohai Univ | China Changjiang Power Co Ltd | Water Qual Dept | Jiangsu Bur Hydrol & Water Resources Survey

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Abstract

Estimating ecological environmental flow in tidal rivers is one of the major challenges for sustainable water resource management in estuaries and river basins. This paper presents an ecological environmental flow framework that was developed to accommodate highly dynamic medium tidal estuaries found along the Yellow Sea coast of China. The framework not only proposes a method of water quality-based ecological flow for tidal gate-controlled rivers but also proposes a method of water demand for scouring and silting to protect ports in coastal viscous sediment environments. The framework integrates the instream water requirements of water quality, sediment and basic ecological flow, and considers the temporal and spatial variation differences for the environmental flow requirements of tidal rivers. This study emphasizes the significance and necessity of continuous monitoring of ecological data in determining the environmental flow of tidal rivers. The output of this study could provide vital references for decision-making and management of the water resource allocation and ecological protection in tidal rivers.

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Key words

basic ecological flow,ecological environmental flow,hydrodynamic model,medium tidal estuary,sediment transport,water quality

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【要点】：本研究开发了一个适用于中国黄海南部复杂水力条件的中等潮汐河流的生态环境流量框架，提出了基于水质的适用于潮汐闸控河流的生态流量方法以及保护沿海粘性泥沙环境中港口的冲刷和淤积用水需求方法，强调了连续监测生态数据在确定潮汐河流环境流量中的重要性和必要性。

【方法】：本研究提出的方法结合了水质、泥沙和基本生态流的水内需求，并考虑了潮汐河流环境流量要求的时间和空间变化差异。

【实验】：本研究的结果可以为潮汐河流的水资源分配和生态保护决策和管理提供重要参考，实验使用了中国黄海南部的中等潮汐河流作为数据集，并通过连续监测生态数据来确定环境流量。