| 大渡河干流已建梯级水电站生态基流目标回顾性评价 |
| Assessment of Ecological Base Flow Targets for Cascaded Hydropower Plants on Dadu River |
| 投稿时间：2023-11-28 修订日期：2024-01-03 |
| DOI：10.15928/j.1674-3075.202311280352 |
| 中文关键词:生态基流 回顾性评价 双指标控制法 大渡河 |
| 英文关键词:ecological base flow retrospective assessment double-indexed control method Dadu River |
| 基金项目:国家重点研发计划(2021YFC3200304); 水利部财政专项水资源管理项目(126202006000190003); 长江勘测规划设计研究有限责任公司自主创新项目(CX2020Z02)。 |
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| 中文摘要: |
| 以大渡河干流已建水利水电工程为研究对象开展回顾性评价，为推动后续生态基流研究和水资源管理提供参考。研究采用多种水文学方法，包括Tennant 法、Texas法、Q90法、多年最小月平均流量法和Northern Great Plains Resource Program （NGPRP）法，计算大渡河干流已建梯级水电站的生态基流目标值。根据计算结果中各控制断面的最小值、最大值和平均值，建立生态基流目标值的参考区间，分别对应底线、优和良好的标准线，并对大渡河干流已建梯级水电站生态基流目标进行了回顾性评价。结果表明，大多数断面的现行生态基流目标值均在最大和最小参考值区间范围，目标值设置基本合理。针对不同历史条件下或不同行业领域中存在的生态基流相关概念内涵和适用边界条件的不一致问题，以及拦河工程生态基流调度的实际问题，研究提出生态基流目标体系的双指标控制法，并提出了大渡河干流已建梯级水电站生态基流目标建议值建议双江口、猴子岩、深溪沟、龚嘴、铜街子的生态基流目标采用日均和瞬时双控值，分别设为121/52、160/78、327/188、366/149和366/236?m3/s，而沙湾和安谷均设为366?m3/s。 |
| 英文摘要: |
| Ecological flow is crucial for maintaining the structure and function of aquatic ecosystems in rivers and lakes, and the ecological base flow has been recognized as the minimum required to maintain the ecological function of aquatic ecosystems. The Dadu River basin is important for both hydropower development and biodiversity conservation in China and it is therefore important to conduct regular assessments of ecological base flow targets. In this study, five methods were used to calculate target values of ecological base flow for the cascaded hydropower plants on Dadu River, including Tennant, Texas, Q90, multi-year average monthly minimum flow, and the Northern Great Plains Resource Program (NGPRP). A reference range of ecological base flow targets was established based on the minimum, maximum and average values of each river reach, in order to meet the respective targets of bottom line, good status line and moderate status line for ecological base flow. The retrospective assessment of ecological base flow targets in Dadu River was then carried out using the three-line range system. Results show that the current ecological base flow is suitable in most control sections. Controversies about the connotations and applicable boundary conditions for ecological base flow resulting from different historical scenarios and industries make it difficult to regulate ecological base flow for hydraulic projects. We thus provide a double-indexed control method for meeting ecological base flow targets for cascaded hydropower plants on Dadu River. It is recommended that the ecological base flow targets for Shuangjiangkou, Houziyan, Shenxigou, Gongzui and Tongjiezi transects are set at daily and instantaneous dual control values of 121/52, 160/78, 327/188, 366/149 and 366/236 m3/s respectively, while Shawan and Angu transects are both set at 366 m3/s, respectively. Our study provides an effective method for retrospective evaluation of ecological base flow targets at the watershed scale, and guidance for future ecological base flow research and management. |
| 陈在妮,刘宏高,黄克威,李书飞,曲田,易燃,陶江平.2024.大渡河干流已建梯级水电站生态基流目标回顾性评价[J].水生态学杂志,45(1):50-57. |
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