长江科学院院报 ›› 2020, Vol. 37 ›› Issue (8): 29-34.DOI: 10.11988/ckyyb.20190462

• 水资源与环境 • 上一篇    下一篇

基于改进FDC法的小水电生态流量计算与生态调度研究

刘树锋1,2, 陈记臣1,2, 关帅1,2   

  1. 1.广东省水利水电科学研究院 河口水利技术国家地方联合工程实验室,广州 510635;
    2.广东省水动力学应用研究重点实验室,广州 510635
  • 收稿日期:2019-04-23 出版日期:2020-08-01 发布日期:2020-09-01
  • 通讯作者: 陈记臣(1991-),男,广西贺州人,工程师,硕士,主要从事水文水环境研究。E-mail:1006488690@qq.com
  • 作者简介:刘树锋(1978-),男,广东韶关人,高级工程师,博士,主要从事水文水资源研究。E-mail:35292308@qq.com
  • 基金资助:
    广东省水利科技创新项目(2017-12)

Ecological Flow Calculation and Ecological Operation of SmallHydropower Based on Modified Flow Duration Curve Method

LIU Shu-feng1,2, CHEN Ji-chen1,2, GUAN Shuai1,2   

  1. 1. State-Province Joint Engineering Laboratory of Estuarine Hydraulic Technology, Guangdong Research Instituteof Water Resources and Hydropower, Guangzhou 510635, China;
    2. Guangdong Provincial Key Laboratory ofHydrodynamics Application, Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635, China
  • Received:2019-04-23 Online:2020-08-01 Published:2020-09-01

摘要: 中小河流上的小水电在蓄水发电发挥经济效益的同时也会对环境产生一定的影响。为避免下游出现减脱水情况,小水电的生态流量计算和生态调度研究显得尤为重要。选取杨溪河上的横溪引水式水电站为例,运用降雨-径流深关系计算径流量,同时应用改进的流量-历时曲线(FDC)法计算丰、平、枯水年的生态流量,并进行生态调度研究。结果表明:依据韶关站的降雨-径流深关系,能够较为准确地求得横溪水电站的径流量;无调度情况下,横溪水电站的来水量在不同来水年均不能完全满足根据改进FDC法计算得到的生态流量要求;改进FDC法具有一定的推广适用性和合理性;通过生态调度后,横溪水电站不同来水年的过坝流量均能满足水生生态需求,而且能够使发电效益最大。研究可为促进水能的可持续开发、高效平衡发电效益与生态效益以及中小河流的健康管理提供参考。

关键词: 小水电, 生态流量, 生态调度, 流量历时曲线, 横溪水电站

Abstract: The water storage and power generation of small hydropower on small and medium-sized rivers not only brings about economic benefits but also affects the environment. The ecological flow calculation and ecological operation of small hydropower are particularly important to refrain from dehydration in the downstream. With Hengxi Hydropower Station on Yangxi River as a case study, we first of all calculate the runoff according to the relation between rainfall and runoff depth, and further calculate the ecological flow of wet year, flat year, and dry year respectively using the modified flow duration curve (FDC) method. Subsequently we calculate the ecological operation in consideration of ecological flow, power generation, and irrigation. Results reveal that we could accurately calculate the runoff of Hengxi Hydropower Station by using the relationship between rainfall and runoff depth. In the absence of operation, the inflow of Hengxi Hydropower Station could not fully meet the requirements of ecological flow calculated by the modified FDC method at each level year. The modified FDC method is applicable and rational. After ecological operation, the dam-crossing discharge of Hengxi Hydropower Station could meet the demand of aquatic ecology and maximize the benefit of power generation. The research results offer reference for promoting the sustainable development of hydropower, balancing the benefits of power generation and ecology, as well as the healthy management of small and medium-sized rivers.

Key words: small hydropower, ecological flow, ecological operation, flow duration curve, Hengxi Hydropower Station

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