基于年径流的水文干旱指标研究  

Hydrological Drought Index Based on Annual Runoff

作　　者：袁旭琦[1] 赵雪花[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《中国农村水利水电》2014年第9期115-117,122,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(40901018);山西省高等学校优秀青年学术带头人支持计划资助;青年团队启动项目(2013T039)

摘　　要：水文干旱是一种机理复杂、影响深远的干旱现象,相对于气象干旱往往受到的关注较少。基于偏态分布概率的方法,描述水文干旱过程,利用年径流计算水文干旱指标——标准径流指数,建立了评价水文干旱等级的标准。结果表明,修正后的标准径流指数能够准确反映汾河上游水文干旱的情况,优于常规指标,并且能为干旱预警提供依据。Hydrological drought is a complex and influential phenomenon of drought ;it tends to be less concerned with respect to me-teorological drought .In view of skewed probability distribution ,the process of hydrological drought is described .Hydrological drought index-Standardized Runoff Index is calculated with annual runoff dates ,and evaluation criteria of hydrological drought is es-tablished .The results show that the corrected Standard Runoff Index reflects the hydrological drought accurately in the upstream of the Fenhe River .By the way ,it provides a basis for drought warning at the early stage .

关 键 词：径流 标准降水指数 水文干旱 假设检验 

分 类 号：TV121.4[水利工程—水文学及水资源]