摘要
通过收集拱坝河流域下游黄鹿坝水文站的实测径流量资料,采用数理统计法、滑动平均法、线性回归法、滑动T检验法、SNHT检验法对径流量的年内分配、年际变化、演变趋势及变异年份进行研究。结果表明:降水量、径流量年内分配极不均匀,年内分配变化较稳定,降水径流极值变化不对应;径流量的年内分配变差系数C_(v)随着时间推移整体出现减小趋势,年内分配随着年份延长越来越稳定,越来越均匀;径流量年际变差系数C_(v)=0.24,径流量的年际变化较稳定;径流量整体呈不显著减小趋势;径流量变异年份为1993年,变异不显著。研究可为流域水资源管理、水资源合理利用、河湖管理等提供数据支持,同时可为下一步气候变化及人类活动对径流量的影响打下基础。
By collecting measured runoff data from the downstream Huangluba Hydrological Station in the basin,this study analyzes the intra-annual distribution,interannual variation,evolution trend,and mutation years of runoff using methods such as mathematical statistics,moving average,linear regression,moving T-test,and SNHT test.The results show that:precipitation and runoff exhibit extremely uneven intra-annual distribution,with relatively stable patterns over time,but the extremes of precipitation and runoff do not always correspond;the intra-annual variation coefficient of runoff(C_(v))shows a general decreasing trend over time,indicating that the intra-annual distribution of runoff is becoming increasingly stable and uniform;the interannual variation coefficient of runoff is C_(v)=0.24,reflecting relatively stable interannual variation;overall,runoff shows a slight but statistically insignificant decreasing trend;the mutation year for runoff is identified as 1993,though the change is not significant.This research provides valuable data support for watershed water resource management,rational water use,and river-lake governance,and lays the foundation for further studies on the impact of climate change and human activities on runoff.
作者
胡亮
Hu Liang(Gansu Longnan Hydrology and Water Resources Survey Center,ChengXian 742500,Gansu)
出处
《陕西水利》
2025年第8期1-4,共4页
Shaanxi Water Resources
基金
2021年甘肃省水利科学试验研究及技术推广项目第53号。
关键词
径流量
时序变化
趋势
Runoff
temporal variation
trend
