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首页> 外文期刊>Environmental earth sciences >Minimum instream flow requirement for the water-reduction section of diversion-type hydropower station: a case study of the Zagunao River, China
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Minimum instream flow requirement for the water-reduction section of diversion-type hydropower station: a case study of the Zagunao River, China

机译：引水式水电站减水段最小入河流量要求-以中国杂谷脑河为例

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Diversion-type hydroelectric exploitation can reduce instream flow and destroy river ecosystem continuity. Maintaining instream flow is considered an effective way to remediate the damages. The Physical Habitat Simulation (PHABSIM) system still probably remains as the most widespread habitat method used to establish instream flow standards or to link habitat variations with fish population dynamics. This study applies the PHABSIM models, which create a habitat-flow relationship, describing the physical habitat suitability of alternative instream flow releases. Selecting the water-reduction section of the Sangping Power Station on the Zagunao River as the research object, the hydraulic pressure at a cross section was obtained through habitat simulation. The Cyprinidae family of fish, dominant in this region, was targeted using velocity and depth suitability curves. The quantitative relationship between flow and suitable habitat area was established, with the minimum instream flow of the study area calculated as 30.0 m(3)/s, according to the weighted usable area-flow curve. The minimum instream flow of the study area was also estimated through common hydrologic and hydraulic methods. The resulting comparison indicated that the habitat simulation model achieved very similar results to those of the wetted perimeter method and achieved between "good" and "very good" levels using the Tennant method. The result indicates that the PHABSIM model is useful for optimizing the flow release schemes of hydropower stations in southwestern China. Moreover, it helps to analyze trade-offs between human and environmental water needs, resulting in solutions that minimize ecological integrity disturbances.
机译：引流式水力发电开发可减少流入流量并破坏河流生态系统的连续性。保持溪流流量被认为是补救损害的有效方法。物理栖息地模拟（PHABSIM）系统仍然可能仍然是最广泛的栖息地方法，用于建立河流流量标准或将栖息地变化与鱼类种群动态联系起来。这项研究应用了PHABSIM模型，该模型创建了栖息地-流量关系，描述了替代性河床流量释放的物理栖息地适用性。选择扎古瑙河桑平电站减水段为研究对象，通过生境模拟获得断面的水压。使用速度和深度适用性曲线确定了在该区域占优势的鲤科鱼类。建立了流量与合适的栖息地面积之间的定量关系，根据加权的可用面积-流量曲线，计算出研究区域的最小流入流量为30.0 m（3）/ s。还通过普通的水文和水力方法估算了研究区域的最小河道流量。所得的比较结果表明，栖息地模拟模型获得的结果与湿周法非常相似，并且使用Tennant方法获得了“良好”和“非常好”水平。结果表明，PHABSIM模型对于优化中国西南水电站的泄水方案是有用的。此外，它有助于分析人类与环境水需求之间的权衡，从而产生可将生态完整性扰动降至最低的解决方案。

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