中国水利Issue(3)：43-49,7.DOI:10.3969/j.issn.1000-1123.2025.03.006
黄河流域上游干旱区河流水文情势变化研究
Changes in hydrological regime of rivers in the arid region of the upper Yellow River basin——a case study of the Zuli River
摘要
Abstract
The Zuli River is an important first-order tributary in the semi-arid to arid region of the upper Yellow River.Its annual maximum flood flow(AMFF)reflects environmental changes in and serves as a key factor in flood control and storm water resource utilization.Based on 64 years(1957-2020)of observed hydrological data from three hydrological stations along the main stream of the Zuli River,this study employs hydrological statistics,t-tests,Mann-Kendall non-parametric tests,and Morlet wavelet analysis to examine the spatial and temporal variations,change magnitude,abrupt changes,and periodic characteristics of the AMFF.The results indicate that the AMFF in the Zuli River basin shows a decreasing trend overall,with significant(P>0.1)to highly significant(P>0.05)changes observed after the 21st century.The annual change rates in the upper,middle,and lower reaches are-5.0 m3/s,-6.4 m3/s,and-10.5 m3/s,respectively.The coefficient of variation(CV)and the modulus of the AMFF decrease with increasing cumulative frequency of flood occurrences and basin area,with variations ranging between 80%and 88%.The changes in AMFF can be divided into two periods:Ⅰ-Oscillation Period(1957-2000)andⅡ-Significant Change Period(2001-2020),with abrupt change points occurring in the first decade of the 21st century across the upper,middle,and lower reaches.In the 20th century,there was a main cycle of 10～12 years for the AMFF;thereafter,no obvious and stable main cycles were observed,but regular shorter cycles of 4～8 years existed.Changes in conditions such as rising temperatures,decreased precipitation during the flood season,and land use evolution have altered the frequency and magnitude of flood events.关键词
祖厉河流域/水文情势/年最大洪峰流量/黄河上游/干旱区Key words
Zuli River basin/hydrological regime/annual maximum flood flow/upper Yellow River/arid region分类
建筑与水利引用本文复制引用
魏智,魏银璐,刘世华,吴锦奎..黄河流域上游干旱区河流水文情势变化研究[J].中国水利,2025,(3):43-49,7.基金项目
国家自然科学基金面上项目(41771084) （41771084）
甘肃省气象局科研项目(Ms2020-11). （Ms2020-11）
