西南地区综合干旱监测模型构建与验证

在全球极端天气事件越来越多的大背景下,准确监测西南干旱对区域农业可持续发展具有重要的现实意义。该文选取降水距平百分率（percentage of precipitation anomaly index,Pa）、标准化降水指数（standard precipitation index,SPI）、相对湿润指数（relative moisture index,MI）等3种气象类干旱监测模型以及植被供水指数（vegetation water supply index,VWSI）与归一化植被指数（normalized differential vegetation index,NDVI）等2种遥感类干旱...

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Bibliographic Details
Published in农业工程学报 Vol. 33; no. 5; pp. 102 - 107
Main Author 张建平 刘宗元 王靖 何永坤 罗红霞
Format Journal Article
LanguageChinese
Published 重庆市气象科学研究所,重庆,401147%浙江省地理信息中心,杭州,310000%中国农业大学资源与环境学院,北京,100193 2017
Subjects
干旱
模型
监测
西南地区
models
Southwest China
干旱
监测
drought
西南地区
模型
monitoring
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Summary:在全球极端天气事件越来越多的大背景下,准确监测西南干旱对区域农业可持续发展具有重要的现实意义。该文选取降水距平百分率（percentage of precipitation anomaly index,Pa）、标准化降水指数（standard precipitation index,SPI）、相对湿润指数（relative moisture index,MI）等3种气象类干旱监测模型以及植被供水指数（vegetation water supply index,VWSI）与归一化植被指数（normalized differential vegetation index,NDVI）等2种遥感类干旱监测模型,并分别与实测土壤湿度作相关分析,在此基础上选取相关系数最高的相对湿润指数与归一化植被指数为自变量建立综合干旱监测指数（comprehensive drought monitoring index,DI）。结果表明,综合干旱指数与土壤水分实测值有较好的相关性,监测精度可达88.38%;在不同海拔高度内,综合干旱指数的拟合效果比单一指数效果更好,精度更高;在分析2009-2010年西南特大干旱旱情发展的时空演变过程中,综合干旱监测结果与实际干旱情况有较好的空间一致性,监测效果佳。研究成果为西南丘陵山区干旱监测提供了一种新的方法。
Bibliography:Under the context of more frequent global extreme weather events,accurately monitoring the impact of drought on crop growth in Southwest China has important practical significance for the sustainable development of regional agriculture.Firstly,the study selected 3 types of meteorological drought monitoring models including the percentage of precipitation anomaly（Pa）,the standardized precipitation index（SPI）,and the relative moisture index（MI）and 2 types of remote sensing drought monitoring models including the vegetation supply water index（VSWI）and the normalized differential vegetation index（NDVI）.Secondly,the correlation analysis between 3 meteorological drought monitoring indices,2 remote sensing monitoring indices and soil relative moisture data was made by using a pixel-to-station paired correlation approach.Thirdly,MI and NDVI,which had the highest correlation coefficients with soil relative moisture,were selected to develop a comprehensive drought index（DI）finally.The new comprehensive DI makes full us
ISSN:1002-6819
DOI:10.11975/j.issn.1002-6819.2017.05.015