| 基于VSWI和SPI的2000—2016年河南省干旱特征研究 |
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| 引用本文： | 刘晓璐,周廷刚,温莉,吴浪,张兰.基于VSWI和SPI的2000—2016年河南省干旱特征研究[J].干旱区地理,2018,41(5):984-991. |
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| 作者姓名： | 刘晓璐 周廷刚 温莉 吴浪 张兰 |
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| 作者单位： | 西南大学地理科学学院遥感大数据应用重庆工程研究中心, 重庆 400715 |
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| 基金项目： | 国务院三峡办三峡后续工作库区生态与生物多样性保护专项项目（500000201BB5200002） |
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| 摘 要： | 干旱是一种常见且严重的自然灾害，极大地影响着我国的农业生产。以河南省为例，利用MODIS产品植被指数和地表温度数据，构建表征区域干旱特征的植被供水指数（VSWIN、VSWIE），并与河南省16个国家级气象站点数据计算的2000-2016年不同时间尺度的标准化降水指数（SPI）进行对比分析。结果表明：VSWIE比VSWIN更适用于河南省干旱的研究；3个月和12个月尺度的SPI值与VSWI的相关性较高；从时间上看，河南省发生干旱频率较高，春旱和夏旱发生频率分别为0.33和0.30，总体干旱趋势更加明显，其中春旱最严重的是2000年，夏旱最严重的是2014年；从空间上来看，豫北和豫西地区比豫南干旱程度严重。
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| 关 键 词： | 植被供水指数 标准化降水指数 干旱监测 河南省 |
| 收稿时间： | 2018-02-13 |
Characteristics of drought in Henan Province from 2000 to 2016 based on VSWI and SPI |
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| LIU Xiao-lu,ZHOU Ting-gang,WEN Li,WU Lang,ZHANG Lan.Characteristics of drought in Henan Province from 2000 to 2016 based on VSWI and SPI[J].Arid Land Geography,2018,41(5):984-991. |
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| Authors: | LIU Xiao-lu ZHOU Ting-gang WEN Li WU Lang ZHANG Lan |
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| Affiliation: | Chongqing Engineering Research Center for Remote Sensing Big Data Application, School of Geographical Sciences, Southwest University, Chongqing 400715, China |
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| Abstract: | Drought is a common and serious natural disaster,and it seriously effects the agricultural production in China.This paper takes Henan Province,China,as an example,and uses MODIS products MOD13Q1 to obtain vegetation index (NDVI,EVI),and MODIS11A2 to obtain the surface temperature (Ts) data,then constructs the Vegetation Supply Water Index (VSWIN,VSWIE) which indicates the regional drought characteristics.Then,they are compared with the Standardized Precipitation Index (SPI) that is calculated by the data from 16 national weather stations in Henan province at different time scales form 2000 to 2016.Finally the comparison and analysis are carried out.The result shows that VSWIE is more suitable than VSWIN for drought study in Henan Province.The correlations between VSWI and the SPI value at 3 and 12 months scales are higher and more suitable for the drought study of Henan Province.In terms of time,the drought frequency of Henan Province is high,and the spring and summer drought frequencies are 0.33 and 0.30 respectively.The overall drought trend is even more obvious.The worst spring drought happened in 2000,and the worst summer drought occurred in 2014.From the view of space,the drought degree in the north and west of Henan Province is more serious than that in southern Henan.This study reveals the development characteristics of drought in Henan,and provides some useful information for the monitoring and early-warning of drought in Henan. |
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| Keywords: | VSWI SPI monitoring drought Henan Province |
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