Arid
DOI10.1007/s11269-017-1856-6
Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales
Merabti, Abdelaaziz1; Martins, Diogo S.2; Meddi, Mohamed1; Pereira, Luis S.3
通讯作者Pereira, Luis S.
来源期刊WATER RESOURCES MANAGEMENT
ISSN0920-4741
EISSN1573-1650
出版年2018
卷号32期号:3页码:1087-1100
英文摘要

The spatial and temporal variability of droughts were studied for the Northeast Algeria using SPI and RDI computed with monthly precipitation data from 123 rainfall stations and CFSR reanalysis monthly temperature data covering the period 1979-80 to 2013-14. The gridded temperature data was interpolated to all the locations having precipitation data, thus providing to compute SPI and RDI with the time scales of 3-, 6- and 12-month with the same observed rainfall data. Spatial and temporal patterns of droughts were obtained using Principal Component Analysis in S-Mode with Varimax rotation applied to both SPI and RDI. For all time scales of both indices, two principal components were retained identifying two sub-regions that are similar and coherent for all SPI and RDI time scales. Both components explained more than 70% and 74% of drought spatial variability of SPI and RDI, respectively. The identified sub-regions are similar and coherent for all SPI and RDI time scales. The Modified Mann-Kendall test was used to assess trends of the RPC scores, which have shown non-significant trends for decreasing drought occurrence and severity in both identified drought sub-regions and all time scales. Both indices have shown a coherent and similar behavior, however with RDI likely showing to identify more severe and moderate droughts in the southern and more arid sub-region which may be due to its ability to consider influences of global warming. Results for RDI are quite uniform relative to time scales and show smaller differences among the various climates when compared with SPI. Further assessments covering the NW and NE of Algeria using longer time series should be performed to better understand the behavior of both indices.


英文关键词PrincipalComponentAnalysis ModifiedMann-Kendall test Trendanalysis CFSR reanalysis products Spatial distribution of drought classes Climate warming
类型Article
语种英语
国家Algeria ; Portugal
收录类别SCI-E
WOS记录号WOS:000422982300016
WOS关键词STANDARDIZED PRECIPITATION INDEX ; TEMPORAL VARIABILITY ; CLIMATE-CHANGE ; IRRIGATION REQUIREMENTS ; CROP EVAPOTRANSPIRATION ; HOMOGENEOUS REGIONS ; TRENDS ; REGIONALIZATION ; FREQUENCY ; PATTERNS
WOS类目Engineering, Civil ; Water Resources
WOS研究方向Engineering ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/213691
作者单位1.Ecole Natl Super Hydraul Blida, Lab GEE, Blida, Algeria;
2.Univ Lisbon, IDL, Fac Ciencias, Lisbon, Portugal;
3.Univ Lisbon, Inst Super Agron, LEAF Linking Landscape Environm Agr & Food, Lisbon, Portugal
推荐引用方式
GB/T 7714
Merabti, Abdelaaziz,Martins, Diogo S.,Meddi, Mohamed,et al. Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales[J],2018,32(3):1087-1100.
APA Merabti, Abdelaaziz,Martins, Diogo S.,Meddi, Mohamed,&Pereira, Luis S..(2018).Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales.WATER RESOURCES MANAGEMENT,32(3),1087-1100.
MLA Merabti, Abdelaaziz,et al."Spatial and Time Variability of Drought Based on SPI and RDI with Various Time Scales".WATER RESOURCES MANAGEMENT 32.3(2018):1087-1100.
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