Arid
DOI10.1016/j.jaridenv.2007.12.004
Using AVHRR-based vegetation indices for drought monitoring in the Northwest of Iran
Bajgiran, Parinaz Rahimzadeh4; Darvishsefat, Ali A.1; Khalili, All2; Makhdoum, Majid F.3
通讯作者Bajgiran, Parinaz Rahimzadeh
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2008
卷号72期号:6页码:1086-1096
英文摘要

In order to evaluate the capability of NOAA-AVHRR data ford drought monitoring in the northwest of Iran having cold semi-arid climate, a study plan was designed involving the production of normalized difference vegetation index (NDVI) and vegetation condition index (VCI) indices and correlating their values to precipitation data. Raw AVHRR images were processed and geometric and radiometric corrections were performed. Seven-day maximum NDVI maps were produced and VCI was calculated using the maximum and minimum NDVI values for the same time period. Precipitation statistics from 19 synoptic meteorological stations were collected. The study covered a five-year time period with three consecutive months in the growing season. Pearson correlation was performed to correlate NDVI and VCI values to precipitation data. Different time lag schemes were tried and the highest correlation coefficients (r values) were obtained while correlating NDVI and VCI to three-month (current plus last two months) precipitation. Better agreement was observed between NDVI and precipitation as compared with that between VCI and precipitation in individual stations. Good correlations were also obtained between average NDVI and VCI of the study area and average three-month precipitation. The results indicated that NOAA-AVHRR derived NDVI well reflects precipitation fluctuations in the study area promising a possibility for early drought awareness necessary for drought risk management. (C) 2007 Elsevier Ltd. All rights reserved.


英文关键词remote sensing vegetation NDVI VCI precipitation time lag
类型Article
语种英语
国家Iran
收录类别SCI-E
WOS记录号WOS:000255980400018
WOS关键词AFRICAN SAHEL ; PRECIPITATION ; TEMPERATURE ; DYNAMICS ; NDVI ; USA
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/157938
作者单位1.Univ Tehran, Fac Nat Resources, Lab RS & GIS, Karaj, Iran;
2.Univ Tehran, Fac Agr, Tehran 14174, Iran;
3.Univ Tehran, Fac Nat Resources, Tehran 14174, Iran;
4.Univ Tehran, Fac Environm, Tehran, Iran
推荐引用方式
GB/T 7714
Bajgiran, Parinaz Rahimzadeh,Darvishsefat, Ali A.,Khalili, All,et al. Using AVHRR-based vegetation indices for drought monitoring in the Northwest of Iran[J],2008,72(6):1086-1096.
APA Bajgiran, Parinaz Rahimzadeh,Darvishsefat, Ali A.,Khalili, All,&Makhdoum, Majid F..(2008).Using AVHRR-based vegetation indices for drought monitoring in the Northwest of Iran.JOURNAL OF ARID ENVIRONMENTS,72(6),1086-1096.
MLA Bajgiran, Parinaz Rahimzadeh,et al."Using AVHRR-based vegetation indices for drought monitoring in the Northwest of Iran".JOURNAL OF ARID ENVIRONMENTS 72.6(2008):1086-1096.
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