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标准化降水蒸发指数的改进与适用性评价
引用本文:赵静,严登华,杨志勇,胡勇,翁白莎,宫博亚.标准化降水蒸发指数的改进与适用性评价[J].物理学报,2015,64(4):49202-049202.
作者姓名:赵静  严登华  杨志勇  胡勇  翁白莎  宫博亚
作者单位:1. 东华大学环境科学与工程学院, 上海 201620;2. 中国水利水电科学研究院水资源研究所, 北京 100038;3. 安徽省 · 淮委水利科学研究院, 合肥 230088
基金项目:国家科技支撑计划(批准号:2012BAC19B03,2013BAC10B01);国家自然科学基金(批准号:51279207,51409266)资助的课题~~
摘    要:针对标准化降水蒸发指数中Thornthwaite方法对干旱区估算误差较大的问题, 采用FAO Penman-Monteith方法计算潜在蒸发, 改进标准化降水蒸发指数计算方法. 应用1961–2013 年全国541个气象站点逐日观测资料, 从分布检验以及与标准化降水指数、Palmer干旱指数、实测土壤湿度等常用干旱指标一致性校核等方面, 评估改进前后标准化降水蒸发指数在区域和季节上的适用性. 结果表明: 改进蒸发能力计算方法能够显著提高标准化降水蒸发指数的区域和季节适用范围, 使标准化降水蒸发指数能够应用于全国不同季节的干旱评估, 改进了干旱区标准化降水蒸发指数冬季适用性不高的不足, 改进后的标准化降水蒸发指数在年尺度及月尺度上的干旱评估能力均得到改善, 满足我国以季节性干旱为主的干旱评估需求.

关 键 词:标准化降水蒸发指数  改进  Kolmogorov-Smirnov检验  校核
收稿时间:2014-08-23

Improvement and adaptability evaluation of standardized precipitation evapotranspiration index
Zhao Jing;Yan Deng-Hua;Yang Zhi-Yong;Hu Yong;Weng Bai-Sha;Gong Bo-Ya.Improvement and adaptability evaluation of standardized precipitation evapotranspiration index[J].Acta Physica Sinica,2015,64(4):49202-049202.
Authors:Zhao Jing;Yan Deng-Hua;Yang Zhi-Yong;Hu Yong;Weng Bai-Sha;Gong Bo-Ya
Institution:1. Environmental Science and Engineering Department, Donghua University, Shanghai 201620, China;2. Water Resources Department, China Institute of Water Resources and Hydropower Research, Beijing 100038, China;3. Anhui and Huaihe River Water Resources Research Institute, Hefei 230088, China
Abstract:In view of the question about larger estimate error in arid areas by using the Thornthwaite method of estimating potential evaporation in the process of calculating standardized precipitation evapotranspiration index, we use the FAO Penman-Monteith method instead of Thornthwaite method to improve the method of calculating the standardized precipitation evapotranspiration index. Based on the 1961-2013 daily meteorological data offered by 541 stations of Meteorology Bureau, the distribution of test and standardized rainfall index, Palmer drought severity index and soil moisture are used to analyze the consistency with standardized rainfall evaporation index when used to evaluate drought in the applicability of area and season. Result shows that the improvement on the method of evaporation capacity calculation can significantly expand the application of standardized precipitation evapotranspiration index in area and season, making standardized precipitation evapotranspiration index applied to national drought assessment well, making up the shortcomings in the applicability of standardized precipitation evapotranspiration index in winter at a short time scale level in arid region. In addition, both yearly time scale and monthly time scale of drought assessment ability about modified standardized precipitation evapotranspiration index are improved, meeting the demand for drought assessment in our country, which is given priority to seasonal drought.
Keywords:standardized precipitation evapotranspiration index  improvement  Kolmogorov-Smirnov nonparametric test  contrast
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