Title :
Evaluation of Integrated Surface Drought Index (ISDI) via precipitation data and soil moisture
Author :
Lei Zhou ; Jianjun Wu ; Adu Gong ; Jianhui Zhang ; Ming Liu ; Lin Zhao ; Song Leng ; Xin Lu
Author_Institution :
China Nat. Environ. Monitoring Center, Beijing, China
Abstract :
The constructed Integrated Surface Drought Index (ISDI) has been successfully used for drought monitoring in Mid-eastern China from 2000-2009. In this paper, the precipitation data observed at meteorological stations and soil moisture data (at 10cm, 20cm and 50cm depth) were used to further evaluate the ISDI characteristics for drought monitoring. Correlation analysis indicates that there is clear relationship between ISDI and soil moisture. ISDI has higher correlation with root zone soil moisture than surface and deeper soil moisture, which is crucial indicator for agricultural drought. Temporal trend analysis also shows that ISDI has consistent trend relationship with precipitation and soil moisture. Moreover, ISDI can get comparable results in different regions. The evaluation results provide further evidence of ISDI effectiveness for drought monitoring in Mid-eastern China.
Keywords :
atmospheric precipitation; hydrology; AD 2000 to 2009; ISDI evaluation; Mid-eastern China; agricultural drought; drought monitoring; integrated surface drought index; meteorological stations; precipitation data; soil moisture data; temporal trend analysis; Correlation coefficient; Indexes; Market research; Monitoring; Remote sensing; Soil moisture; Vegetation mapping; Agricultural drought; ISDI; precipitation; soil moisture;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723416
