摘要
以中国西北内陆开都-孔雀河流域(以下简称开孔河流域)为研究区,采用1979~2016年该流域的逐日气象观测资料和逐月径流数据,计算了5种气象水文干旱指数:温度降水均一化指标(TPI)、标准化降水蒸散发指数(SPEI)、径流距平百分比(Ra)、水文干湿指数(d_(i))和标准化径流指数(SRI),在比较了干旱指数评价效果的基础上,分析了不同时间尺度下该流域干旱的特征及气象干旱与水文干旱的关系。结果表明:SPEI反映的气象干旱情况比TPI更为接近实际;与Ra、di相比,SRI的评价结果与历史水文干旱情况更加吻合;SPEI与SRI间的相关性随着时间尺度的增大而先增加后略降低,在12个月时间尺度下达到最大;开孔河流域不同等级水文干旱出现的频率具有一定的稳定性,它不随SRI在不同时间尺度下的变化而显著变化。
The Kaidu-Kongqi River basin in the inland area of Northwest China(hereinafter referred to as the Kai-kong River Basin)was taken as the research area.Based on daily meteorological observation data and monthly runoff data of the basin from 1979 to 2016,five meteorological and hydrological drought indexes including temperature and precipitation homogenization index(TPI),standardized precipitation evapotranspiration index(SPEI),runoff anomaly percentage(Ra),hydrological dryness and wetness index(d_(i))and standardized runoff index(SRI)were calculated.On the basis of comparing the evaluation effects of drought indexes,the characteristics of drought at different time scales and the relationship between meteorological drought and hydrological drought were analyzed.The research results show that the meteorological drought situation reflected by SPEI is closer to reality than TPI.The hydrological drought degree reflected by the SRI is more consistent with the historical hydrological drought situation than Ra and di.The correlation between SPEI and SRI at different time scales is different.As the time scale increases,the correlation coefficient increases and then decreases slightly,and reaches the maximum on the 12-month time scale.The frequency of hydrological droughts at different levels in the Kaidu-Kongqi River Basin has a certain degree of stability,and it does not change significantly with the changing of SRI time scale.
作者
陈丽
徐长春
孙琪
罗映雪
楚智
张晋霞
CHEN Li;XU Chang-chun;SUN Qi;LUO Ying-xue;CHU Zhi;ZHANG Jin-xia(College of Resource and Environment Sciences,Xinjiang University,Urumqi 830046,China;Key Laboratory of Oasis Ecology,Ministry of Education,Xinjiang University,Urumqi 830046,China;Natural Resources and Planning Bureau of Renshou County,Meishan City,Sichuan Province,Meishan 620500,China)
出处
《江西农业学报》
CAS
2021年第8期71-77,共7页
Acta Agriculturae Jiangxi
基金
国家自然科学基金项目“基于水资源变化的干旱内陆区典型流域绿洲适宜规模研究”(41561023)。
