华北水利水电大学学报（自然科学版）2024，Vol.45Issue(5)：31-37,7.DOI:10.19760/j.ncwu.zk.2024051
乌江生态流量及其保障研究
Research on Ecological Flow and Its Guarantee in Wujiang River
摘要
Abstract
Ecological flows are the main driving force to maintain the healthy development of river and lake ecosystem.In order to clarify the flow required for ecological operation of Wujiang main stream,daily flow monitoring data of Wulong Sta-tion in the lower Wujiang River from 1956 to 2019 were selected,and the year of flow mutation at Wulong Station was de-termined by Mann-Kendall method and cumulative distance level method.The minimum ecological flow and suitable eco-logical flow in flood season and non-flood season were calculated by using the RVA method and the improved annual distri-bution method.In addition,the Tennant method was applied to verify the quantified mean ratio of the same period in the process of ecological flow calculation,and based on this,the ecological flow after mutation was studied.The results are as follows.Firstly,the year of mutation in flow at Wulong Station is consistent with the operating time of Pengshui hydropower station,both in 2009.After 2009,the average duration of high flow decreased by 5 days,the occurrence time was delayed by 4 days,the duration of low flow increased by 7 days,the occurrence time was advanced by 21 days,and the flow showed a decreasing trend.Secondly,the average values of minimum ecological flow in flood and non-flood season were 1 211.77 m3/s and 465.20 m3/s,which accounted for 52％ and 60％ of the multi-year average flow,respectively.The suitable ecological flow in flood and non-flood season is 2 194.67 m3/s and 684.05 m3/s respectively,which is 93％ and 89％ of the multi-year average flow respectively.The Tennant method verifies that the mean ratio of the same period basically meets the optimal requirements.Thirdly,the month with the lowest ecological flow guarantee is October,and the guarantee degrees for the minimum ecological flow and suitable ecological flow are 64％ and 53％,respectively.It is recommended to increase the scheduling strategy for the reservoirs adjacent to Wulong Station to ensure sufficient water supply in October.The results of the study can provide reference for ecological restoration and ecological environmental protection in the main stream of Wu-jiang River.关键词
生态流量计算/生态流量保障/最小生态流量/适宜生态流量/乌江Key words
ecological flow calculation/ecological flow protection/minimum ecological flow/suitable ecological flow/Wu-jiang River分类
建筑与水利引用本文复制引用
郭文献,王高振,朱志鹏,谷红梅,王鸿翔..乌江生态流量及其保障研究[J].华北水利水电大学学报（自然科学版）,2024,45(5):31-37,7.基金项目
国家自然科学基金项目(51679090) （51679090）
河南省高校科技创新人才支持计划项目(16HASTIT024) （16HASTIT024）
河南省科技攻关项目(162102110015) （162102110015）
华北水利水电大学研究生教育创新计划基金项目(YK220-02) （YK220-02）
贵州省水利厅 2020 年度水利科技项目(KT202008). （KT202008）
