raybet体育在线 院报 ›› 2025, Vol. 42 ›› Issue (5): 57-64.DOI: 10.11988/ckyyb.20240930

• 水资源 • 上一篇    下一篇

基于IHA-RVA法的祖厉河流域水文情势变化分析

吕明侠1,2(), 王一博2()   

  1. 1 甘肃省定西水文水资源勘测中心,甘肃 定西 743000
    2 兰州大学 资源环境学院,兰州 730000
  • 收稿日期:2024-09-04 修回日期:2024-11-05 出版日期:2025-05-01 发布日期:2025-05-01
  • 通信作者:
    王一博(1970-),男,甘肃会宁人,教授,博士,研究方向为寒区旱区水文水资源。E-mail:
  • 作者简介:

    吕明侠(1989-),女,甘肃渭源人,工程师,硕士,研究方向为水文水资源。E-mail:

  • 基金资助:
    四川大学山区河流保护与治理全国重点实验室开放课题(SKHL2314); 甘肃省水利科学试验研究及推广计划项目(22GSLK030); 甘肃省水利科学试验研究及推广计划项目(25GSLK010); 国家重点研发计划项目(U2240226)

Hydrological Regime Alteration in Zuli River Basin Based on IHA-RVA Method

LÜ Ming-xia1,2(), WANG Yi-bo2()   

  1. 1 Dingxi Hydrological and Water Resources Survey Center of Gansu Province, Dingxi 743000, China
    2 College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
  • Received:2024-09-04 Revised:2024-11-05 Published:2025-05-01 Online:2025-05-01

摘要: 气候变化和人类活动强烈改变区域水文环境,迫切需要基于高精度实测数据对黄土高原水土流失区水文情势变化开展详细研究。基于日尺度的径流数据,运用水文指标变化范围(IHA-RVA)法对流域的水文情势改变程度进行了综合评估。结果表明:气候暖化和水土保持措施共同影响下祖厉河流域的年平均径流量呈显著下降趋势,在1996年发生突变,且水土保持措施的贡献大于气候变化贡献的3倍以上。径流突变前后,流域水文整体改变度为48%,属于中度改变。极端水文指标的改变度大于月均流量指标的改变度,低流量历时改变度最大达到95%,11月份月均流量改变度仅1%。径流突变后,不管是月均流量指标还是极端流量指标均呈现出年内分布的均匀化趋势。该研究为干旱的水土流失区生态环境保护及水资源规划管理提供方法依据和理论支撑。

关键词: IHA-RVA法, 水文情势变化, 水文改变度, 水土流失区, 祖厉河流域

Abstract:

[Objective] This study aims to investigate the hydrological regime alteration in rivers in the soil erosion region of the Loess Plateau under the combined influence of climate change and human activities.[Methods]Using daily runoff data, this study conducted a comprehensive evaluation of the degree of hydrological regime alteration in the basin using the Indicators of Hydrologic Alteration-Range of Variability Approach (IHA-RVA). [Results] Climate warming and soil-water conservation measures jointly led to a significant decrease in the annual average runoff in the Zuli River Basin, with an abrupt change occurring around 1995.Following the abrupt change of runoff, both monthly average flow and related extreme flow indicators exhibited a trend of uniform intra-annual distribution. The degree of change in extreme hydrological indicators was greater than that in monthly average flow indicators,with the change in low-flow duration reaching up to 95% and the change in monthly average flow in November being only 1%.The occurrence time of annual minimum flows advanced significantly,whereas the occurrence time of maximum flows was delayed. After the hydrological abrupt change,both the frequency and duration of high and low flows at the Jingyuan Station decreased significantly.The Zuli River Basin experienced more frequent flow changes,while the amplitude of these changes gradually diminished. After the abrupt change of runoff in the Zuli River Basin, the overall hydrological alteration degree was 48%, which was classified as moderate alteration. [Conclusions] Human activities, primarily driven by soil-water conservation measures, strongly influence the hydrological regime alteration in the Zuli River Basin. Following the abrupt change of runoff, a notable decrease in basin runoff is observed, accompanied by a trend towards more uniform intra-annual distribution. This study provides methodological frameworks and theoretical foundations for ecological conservation and water resource management in arid, soil erosion regions.

Key words: IHA-RVA method, hydrological regime alteration, degree of hydrological alteration, soil erosion region, Zuli River Basin

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