水资源与水工程学报2024，Vol.35Issue(1)：82-89,8.DOI:10.11705/j.issn.1672-643X.2024.01.10
基于复合事件指数的西北地区高温干旱复合事件风险评估
Risk assessment of compound dry-hot events in northwest China based on compound event indexes
摘要
Abstract
Two compound dry-hot event indexes,i.e.,standardized compound event indicator(SCEI)and blended dry and hot events index(BDHI),were calculated based on the standardized precipitation index(SPI)and the standardized temperature index(STI).Then,the performance of SCEIand BDHIin monitoring the compound dry-hot events over northwest China was evaluated,by which the risk changes of compound dry-hot events were analyzed based on the severity,area coverage percentage and frequen-cy.The results show that the BDHIhas a better performance in monitoring the compound dry-hot events over northwest China than SCEI,due to its coverage of diverse correlations between different dry and hot conditions;whereas the SCEI may misjudge the hot and wet conditions as compound dry-hot events.The severity,area coverage percentage and frequency of compound dry-hot events were higher during the period of 1994-2022 than that of 1982-1993 over northwest China.During the period of 1994-2022,the area proportions of compound dry-hot events with the light,moderate,and severe categories were 35%,25%,and 10%,respectively.Notably,the central part of Xinjiang,northern and eastern Gansu,southern Qinghai,and most of Shaanxi have hardly experienced compound dry-hot events above the severe level during the period of 1982-1993;however,the frequency of these events has significant-ly increased in these areas during the period of 1994-2022.关键词
高温干旱复合事件/风险评估/复合事件指数/西北地区Key words
compound dry-hot events/risk assessment,compound event index/northwest China分类
天文与地球科学引用本文复制引用
钱潭锐,逯家彤,粟晓玲,吴海江..基于复合事件指数的西北地区高温干旱复合事件风险评估[J].水资源与水工程学报,2024,35(1):82-89,8.基金项目
国家自然科学基金项目(52079111) （52079111）
水利部重大科技项目(SKS-2022018) （SKS-2022018）
中央高校基本科研业务费专项资金项目(2023HHZX004) （2023HHZX004）
西北农林科技大学2023年大学生创新创业训练计划项目(202310712084) （202310712084）
