The Use of SPEI and TVDI to Assess Temporal-Spatial Variations in Drought Conditions in the Middle and Lower Reaches of the Yangtze River Basin, China
Joint Authors
Zhang, Liping
Chen, Shaodan
She, Dunxian
Liu, Xin
Guo, Mengyao
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-29
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Droughts represent the most complex and damaging type of natural disaster, and they have taken place with increased frequency in China in recent years.
Values of the standardized precipitation evapotranspiration index (SPEI) calculated using station-based meteorological data collected from 1961 to 2013 in the middle and lower reaches of the Yangtze River Basin (MLRYRB) are used to monitor droughts.
In addition, the SPEI is determined for different timescales (1, 3, 6, and 12 months) to characterize dry or wet conditions in this study area.
Moreover, remote sensing methods can cover large areas, and multispectral and temporal observations are provided by satellite sensors.
The temperature vegetation dryness index (TVDI) is selected to permit assessment of drought conditions.
In addition, the correlation between the SPEI and TVDI values is calculated.
The results show that the SPEI values over different timescales reflect complex variations in drought conditions and have been well applied in the MLRYRB.
Droughts occurred on an annual basis in 1963, 1966, 1971, 1978, 1979, 1986, 2001, 2011, and 2013, particularly 2011.
In addition, the regional average drought frequency in the study area during 1961–2013 is 30%, as determined using the SPEI.
An analysis of the correlation between the monthly values of the TVDI and the SPEI-3 shows that a negative relationship exists between the SPEI-3 and the TVDI.
That is, smaller TVDI values are associated with greater SPEI-3 values and reduced drought conditions, whereas larger TVDI values are associated with smaller SPEI-3 values and enhanced drought conditions.
Therefore, this study of the relationship between the SPEI and the TVDI can provide a basis for government to mitigate the effects of drought.
American Psychological Association (APA)
Chen, Shaodan& Zhang, Liping& Liu, Xin& Guo, Mengyao& She, Dunxian. 2018. The Use of SPEI and TVDI to Assess Temporal-Spatial Variations in Drought Conditions in the Middle and Lower Reaches of the Yangtze River Basin, China. Advances in Meteorology،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1119000
Modern Language Association (MLA)
Chen, Shaodan…[et al.]. The Use of SPEI and TVDI to Assess Temporal-Spatial Variations in Drought Conditions in the Middle and Lower Reaches of the Yangtze River Basin, China. Advances in Meteorology No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1119000
American Medical Association (AMA)
Chen, Shaodan& Zhang, Liping& Liu, Xin& Guo, Mengyao& She, Dunxian. The Use of SPEI and TVDI to Assess Temporal-Spatial Variations in Drought Conditions in the Middle and Lower Reaches of the Yangtze River Basin, China. Advances in Meteorology. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1119000
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119000