首页|日调节水电站对水文情势的再调节作用研究—以尼那—拉西瓦为例

日调节水电站对水文情势的再调节作用研究—以尼那—拉西瓦为例

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为明确日调节水电站对水文情势的再调节作用,文中根据贵德站 1954-2020 年逐日径流资料,采用水文变异诊断系统及水文指标变化范围法(IHA-RVA)对比分析多年调节能力和日调节能力水电站(龙羊峡水电站及尼那和拉西瓦水电站)对水文情势及生态影响.结果显示:贵德站年径流序列在1986 年发生显著突变;龙羊峡(具有多年调节能力的控制性水电站)运行后,水文情势整体改变度为88.51%,其中28 个指标发生了高度改变;日调节水电站(尼那和拉西瓦)的叠加运行后,水文情势整体改变度下降为 75.24%,其中高度改变的水文指标下降至15 个.结果表明日调节水电站(尼那和拉西瓦)发挥了显著的再调节作用,降低了龙羊峡对汛期月径流、极端流量等指标的影响,使径流整体更加趋近于天然时期,但流量的变化更加频繁,并且程度加剧.
Additional influence of daily regulatable hydroplant on hydrological regime:An example of Nina-Laxiwa
In order to clarify the re-regulation effect of daily regulatable hydroplants on the hydrological regime,based on the daily runoff data at Guide hydrographic station from 1954 to 2020,the hydrological variation diagnosis system and the indicators of hydrologic alteration-range of variability approach(IHA-RVA)were used to compare the effects of the multi-yearly regulatable and daily regulatable hydroplants(Longyangxia hydroplant and Nina and Laxiwa hydroplants)on the hydrological regime and the ecological environment.The results showed that the annual runoff series at Guide hydrographic station experienced a significant mutation in 1986.After the operation of Longyangxia hydroplant(a controllable hydroplant with multi-year regulating ability),the overall change rate of hydrological regime was88.51%,with28 indicators experiencing significant changes.After the superposition operation of the daily regulatable hydroplants(Nina and Laxiwa),the overall change rate of hydrological regime decreased to 75.24%,and the highly alternated hydrological indicators decreased to 15.The results show that the daily regulatable hydroplants(Nina and Laxiwa)has played a significant re-regulating role,reduced the impact of Longyangxia on the monthly runoff in flood season,the extreme flow,and other indicators,made the runoff alternation more similar to the natural period,but the flow changes are more frequent and the degree is intensified.

daily regulatable hydroplantcontrollable hydroplantindicators of hydrologic alteration-range of variability approach(IHA-RVA)hydrological regimeNina-Laxiwa hydroplants

李时、杨雪、李凤年、王盼、张梦园、秦毅

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中国电建集团西北勘测设计研究院有限公司,西安 710065

西安理工大学水利水电学院,西安 710048

西安理工大学西北旱区生态水利国家重点实验室,西安 710048

日调节水电站 控制性水电站 IHA-RVA法 水文情势 尼那-拉西瓦

国家自然科学基金项目陕西省教育厅重点科学研究计划项目西安理工大学博士科研启动项目

5220903521JT032256082016

2024

10.13448/j.cnki.jalre.2024.190

干旱区资源与环境
中国自然资源学会干旱半干旱地区研究委员会　内蒙古农业大学

干旱区资源与环境

CSSCICHSSCD北大核心
影响因子：1.492
ISSN：1003-7578
年,卷(期)：2024.38(9)