Ecohydraulic Assessment of Water Abstraction for Hydroelectric Power Generation in the Anegawa River, Japan
Ecohydraulic Assessment of Water Abstraction for Hydroelectric Power Generation in the Anegawa River, Japan
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DOI：
10.7132/jrcsa.25_1_7
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
S. Maeda;S. Ishizaki;A. Minagawa;Hisashi Kobayashi;Koshi Yoshida;H. Kuroda
中科院分区：
文献类型：
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作者：
S. Maeda;S. Ishizaki;A. Minagawa;Hisashi Kobayashi;Koshi Yoshida;H. Kuroda
：利用二维水动力模拟、日本姊川河中游河段的栖息地适宜性指数 (HSI)、加权可用面积 (WUA) 和加权适宜面积 (WSA) 评估了水力发电取水对河内鱼类栖息地的影响。研究河段受上游大坝流量调节和水力发电取水的影响。利用 2015 年和 2016 年的观测数据对非定常二维水动力模型进行了校准和验证。通过结合计算的水力变量和给定物种的适宜性指数，评估了成年虾虎鱼 (Rhinogobius Flumineus) 和黑鲢鱼 (Nipponocypris temminckii) 的栖息地质量。对空间HSI分布以及0.1~40 m 3 /s流量下的WUA和WSA变化的分析表明，虾虎鱼的WUA和WSA往往大于暗鲢鱼的WUA和WSA。在产卵月份，取水对虾虎鱼和黑鲢鱼产生相反的影响。这些结果，包括这里开发的流量曲线，可以为改善这条河流和其他日本河流的流态的未来管理提供信息。
: The influence of water abstraction for hydroelectric power generation on instream fish habitat was evaluated using a two-dimensional hydrodynamic simulation, the Habitat Suitability Index (HSI), Weighted Usable Area (WUA), and Weighted Suitable Area (WSA) in a midstream reach of the Anegawa River, Japan. The study reach is affected by upstream dam flow regulation and water withdrawal for hydropower generation. The unsteady two-dimensional hydrodynamic model was calibrated and validated with observed data from 2015 and 2016. The reach’s habitat quality was assessed for the adult goby ( Rhinogobius flumineus ) and dark chub ( Nipponocypris temminckii ) by combining computed hydraulic variables and suitability indices for the given species. Analysis of the spatial HSI distribution and the WUA and WSA variations under discharges ranging from 0.1 – 40 m 3 /s revealed that both WUA and WSA for goby tended to be larger than those of dark chub . Water abstraction had opposite effects on goby and dark chub during their spawning months. These results, including the flow curves developed here, could inform improved future management of the flow regime in this and other Japanese rivers.