摘要
以天津地区为例，基于1954～2011年的月降雨和月气温等气象资料，比较分析了标准化降水指数（SPI）、帕默尔干旱指标（P㈣）和标准化降水蒸散发指数（SPEI）三种干旱指数在不同时间尺度的相关性，并探讨了在干旱事件评价中的应用效果。结果表明，不同时间尺度的SPI和SPEI相关性显著，PDSI与年尺度SPI、SPEI显著相关，SPEI对实际旱情的判断稍优于SPI和PDSI天津地区持续干旱在加剧，值得进一步关注。
Based on the meteorological data of monthly precipitation and monthly air temperature （1954-2011） in Tianjin region, the correlation of Standardized Precipitation Index （SPI）, Palmer Drought Severity Index （PDSI） and Standardized Precipitation Evapotranspiration Index （SPE1） are analyzed and compared on the different time scales. And the feasibility of three drought indices in Tianjin region is studied respectively. The results show that the SPI and the SPEI have obvious correlation on different time scales; the PDSI have good correlation with the SPI and the SPEI on annual scale; SEPI is more sensitive to the drought than that of SPI and PDSI. The durable drought in Tianjin region hadn＇t stopped the trend, deserving further attention.
出处
《水电能源科学》
北大核心
2013年第11期1-4,共4页
Water Resources and Power
基金
国家自然科学基金面上基金资助项目(41171220)
国家科技支撑计划课题基金资助项目(2012BAB03B03)
水利部公益行业经费资助项目(200901045)
关键词
标准化降水指数
标准化蒸散发指数
帕默尔干旱指标
天津地区
Standardized Precipitation Index
Standardized Precipitation Evapotranspiration Index
Palmer Drought Severity Index
Tianjin region
