Title
Drought monitoring and analysis in China based on the Integrated Surface Drought Index (ISDI)
Abstract
Timely and accurate monitoring of the onset and evolution of drought in China are important to reduce losses from drought. The Integrated Surface Drought Index (ISDI) which originally established in mideast China shows a large potential for real-time regional drought monitoring. However, ISDI is still at the developmental stage, and the applicability of the index requires further examination especially for China with vast area, climatic conditions, complex topography, and land cover. Furthermore, ISDI model depends on the historical training data corresponding to the study area. ISDI application in China must be remodeled using the historical training data over China. In this paper, we remodeled ISDI over China based on previous work and evaluated its capability for near real-time drought monitoring. Using the Palmer Drought Severity Index (PDSI) as a dependent variable, ISDI integrates climate-based drought indices, satellite-based Vegetation Index (VI) and land surface temperature (LST) with other biophysical and elevation data to produce a 1-km regional drought condition map at 16-day intervals. Strong relationships were determined between the calculated ISDI and PDSI for spring, summer and autumn, and all of the correlation coefficients exceeded 0.8. The initial ISDI results demonstrated a good performance for monitoring droughts in southwestern China from 2009 to 2010, high temperatures and droughts in southern China in 2013, and floods in northeastern China in 2013. The higher spatial resolution and near real-time capability of ISDI can provide important inputs for drought management and mitigation in China.
Year
DOI
Venue
2015
10.1016/j.jag.2015.04.006
International Journal of Applied Earth Observation and Geoinformation
Keywords
Field
DocType
Drought monitoring,ISDI,Remote sensing,MODIS,Data mining
Training set,Land surface temperature,Vegetation Index,Hydrology,Remote sensing,China,Elevation,Climatology,Geography,Land cover
Journal
Volume
ISSN
Citations 
41
0303-2434
1
PageRank 
References 
Authors
0.39
5
6
Name
Order
Citations
PageRank
Jianjun Wu184.82
Lei Zhou210.73
Xinyu Mo310.39
Hongkui Zhou410.73
Jie Zhang5123.78
Ruijing Jia610.39